1. 23 Oct, 2014 11 commits
    • Felipe Balbi's avatar
      usb: gadget: udc: core: fix kernel oops with soft-connect · bfa6b18c
      Felipe Balbi authored
      Currently, there's no guarantee that udc->driver
      will be valid when using soft_connect sysfs
      interface. In fact, we can very easily trigger
      a NULL pointer dereference by trying to disconnect
      when a gadget driver isn't loaded.
      
      Fix this bug:
      
      ~# echo disconnect > soft_connect
      [   33.685743] Unable to handle kernel NULL pointer dereference at virtual address 00000014
      [   33.694221] pgd = ed0cc000
      [   33.697174] [00000014] *pgd=ae351831, *pte=00000000, *ppte=00000000
      [   33.703766] Internal error: Oops: 17 [#1] SMP ARM
      [   33.708697] Modules linked in: xhci_plat_hcd xhci_hcd snd_soc_davinci_mcasp snd_soc_tlv320aic3x snd_soc_edma snd_soc_omap snd_soc_evm snd_soc_core dwc3 snd_compress snd_pcm_dmaengine snd_pcm snd_timer snd lis3lv02d_i2c matrix_keypad lis3lv02d dwc3_omap input_polldev soundcore
      [   33.734372] CPU: 0 PID: 1457 Comm: bash Not tainted 3.17.0-09740-ga93416e-dirty #345
      [   33.742457] task: ee71ce00 ti: ee68a000 task.ti: ee68a000
      [   33.748116] PC is at usb_udc_softconn_store+0xa4/0xec
      [   33.753416] LR is at mark_held_locks+0x78/0x90
      [   33.758057] pc : [<c04df128>]    lr : [<c00896a4>]    psr: 20000013
      [   33.758057] sp : ee68bec8  ip : c0c00008  fp : ee68bee4
      [   33.770050] r10: ee6b394c  r9 : ee68bf80  r8 : ee6062c0
      [   33.775508] r7 : 00000000  r6 : ee6062c0  r5 : 0000000b  r4 : ee739408
      [   33.782346] r3 : 00000000  r2 : 00000000  r1 : ee71d390  r0 : ee664170
      [   33.789168] Flags: nzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
      [   33.796636] Control: 10c5387d  Table: ad0cc059  DAC: 00000015
      [   33.802638] Process bash (pid: 1457, stack limit = 0xee68a248)
      [   33.808740] Stack: (0xee68bec8 to 0xee68c000)
      [   33.813299] bec0:                   0000000b c0411284 ee6062c0 00000000 ee68bef4 ee68bee8
      [   33.821862] bee0: c04112ac c04df090 ee68bf14 ee68bef8 c01c2868 c0411290 0000000b ee6b3940
      [   33.830419] bf00: 00000000 00000000 ee68bf4c ee68bf18 c01c1a24 c01c2818 00000000 00000000
      [   33.838990] bf20: ee61b940 ee2f47c0 0000000b 000ce408 ee68bf80 c000f304 ee68a000 00000000
      [   33.847544] bf40: ee68bf7c ee68bf50 c0152dd8 c01c1960 ee68bf7c c0170af8 ee68bf7c ee2f47c0
      [   33.856099] bf60: ee2f47c0 000ce408 0000000b c000f304 ee68bfa4 ee68bf80 c0153330 c0152d34
      [   33.864653] bf80: 00000000 00000000 0000000b 000ce408 b6e7fb50 00000004 00000000 ee68bfa8
      [   33.873204] bfa0: c000f080 c01532e8 0000000b 000ce408 00000001 000ce408 0000000b 00000000
      [   33.881763] bfc0: 0000000b 000ce408 b6e7fb50 00000004 0000000b 00000000 000c5758 00000000
      [   33.890319] bfe0: 00000000 bec2c924 b6de422d b6e1d226 40000030 00000001 75716d2f 00657565
      [   33.898890] [<c04df128>] (usb_udc_softconn_store) from [<c04112ac>] (dev_attr_store+0x28/0x34)
      [   33.907920] [<c04112ac>] (dev_attr_store) from [<c01c2868>] (sysfs_kf_write+0x5c/0x60)
      [   33.916200] [<c01c2868>] (sysfs_kf_write) from [<c01c1a24>] (kernfs_fop_write+0xd0/0x194)
      [   33.924773] [<c01c1a24>] (kernfs_fop_write) from [<c0152dd8>] (vfs_write+0xb0/0x1bc)
      [   33.932874] [<c0152dd8>] (vfs_write) from [<c0153330>] (SyS_write+0x54/0xb0)
      [   33.940247] [<c0153330>] (SyS_write) from [<c000f080>] (ret_fast_syscall+0x0/0x48)
      [   33.948160] Code: e1a01007 e12fff33 e5140004 e5143008 (e5933014)
      [   33.954625] ---[ end trace f849bead94eab7ea ]---
      
      Fixes: 2ccea03a (usb: gadget: introduce UDC Class)
      Cc: <stable@vger.kernel.org> # v3.1+
      Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
      bfa6b18c
    • Sebastian Andrzej Siewior's avatar
      usb: musb: musb_dsps: fix NULL pointer in suspend · f042e9cb
      Sebastian Andrzej Siewior authored
      So testing managed to configure musb in DMA mode but not load the
      matching cppi41 driver for DMA. This results in
      
      |musb-hdrc musb-hdrc.0.auto: Failed to request rx1.
      |musb-hdrc musb-hdrc.0.auto: musb_init_controller failed with status -517
      |platform musb-hdrc.0.auto: Driver musb-hdrc requests probe deferral
      
      which is "okay". Once the driver is loaded we re-try probing and
      everyone is happy. Until then if you try suspend say
          echo mem > /sys/power/state
      then you go boom
      
      |Unable to handle kernel NULL pointer dereference at virtual address 000003a4
      |pgd = cf50c000
      |[000003a4] *pgd=8f6a3831, *pte=00000000, *ppte=00000000
      |Internal error: Oops: 17 [#1] ARM
      |PC is at dsps_suspend+0x18/0x9c [musb_dsps]
      |LR is at dsps_suspend+0x18/0x9c [musb_dsps]
      |pc : [<bf08e268>] lr : [<bf08e268>] psr: a0000013
      |sp : cbd97e00 ip : c0af4394 fp : 00000000
      |r10: c0831d90 r9 : 00000002 r8 : cf6da410
      |r7 : c03ba4dc r6 : bf08f224 r5 : 00000000 r4 : cbc5fcd0
      |r3 : bf08e250 r2 : bf08f264 r1 : cf6da410 r0 : 00000000
      |[<bf08e268>] (dsps_suspend [musb_dsps]) from [<c03ba508>] (platform_pm_suspend+0x2c/0x54)
      |Code: e1a04000 e9900041 e2800010 eb4caa8e (e59053a4)
      
      because platform_get_drvdata(glue->musb) returns a NULL pointer as long as the
      device is not fully probed.
      Tested-by: default avatarGeorge Cherian <george.cherian@ti.com>
      Signed-off-by: default avatarSebastian Andrzej Siewior <bigeasy@linutronix.de>
      Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
      f042e9cb
    • Sebastian Andrzej Siewior's avatar
      usb: musb: dsps: start OTG timer on resume again · 53185b3a
      Sebastian Andrzej Siewior authored
      Commit 468bcc2a ("usb: musb: dsps: kill OTG timer on suspend") stopped
      the timer in suspend path but forgot the re-enable it in the resume
      path. This patch fixes the behaviour.
      
      Cc: <stable@vger.kernel.org> # v3.14+
      Fixes 468bcc2a "usb: musb: dsps: kill OTG timer on suspend"
      Signed-off-by: default avatarSebastian Andrzej Siewior <bigeasy@linutronix.de>
      Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
      53185b3a
    • Felipe Balbi's avatar
      usb: gadget: loopback: don't queue requests to bogus endpoints · e0857ce5
      Felipe Balbi authored
      A request allocated from e.g. ep1out cannot
      be queued to any other endpoint. This bug has
      been in f_loopback at least since mid-2011 and
      since nobody has really screamed about it, we're
      not backporting to any stable kernels.
      
      Debugged with MUSB since that's the only controller
      which complains about this case.
      Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
      e0857ce5
    • David Cohen's avatar
      usb: ffs: fix regression when quirk_ep_out_aligned_size flag is set · c0d31b3c
      David Cohen authored
      The commit '2e4c7553 usb: gadget: f_fs: add aio support' broke the
      quirk implemented to align buffer size to maxpacketsize on out endpoint.
      As result, functionfs does not work on Intel platforms using dwc3 driver
      (i.e. Bay Trail and Merrifield). This patch fixes the issue.
      
      This code is based on a previous Qiuxu's patch.
      
      Fixes: 2e4c7553 (usb: gadget: f_fs: add aio support)
      Cc: <stable@vger.kernel.org> # v3.16+
      Signed-off-by: default avatarDavid Cohen <david.a.cohen@linux.intel.com>
      Signed-off-by: default avatarQiuxu Zhuo <qiuxu.zhuo@intel.com>
      Acked-by: default avatarMichal Nazarewicz <mina86@mina86.com>
      Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
      c0d31b3c
    • Robert Baldyga's avatar
      usb: gadget: f_fs: remove redundant ffs_data_get() · a3058a5d
      Robert Baldyga authored
      During FunctionFS bind, ffs_data_get() function was called twice
      (in functionfs_bind() and in ffs_do_functionfs_bind()), while on unbind
      ffs_data_put() was called once (in functionfs_unbind() function).
      In result refcount never reached value 0, and ffs memory resources has
      been never released.
      
      Since ffs_data_get() call in ffs_do_functionfs_bind() is redundant
      and not neccessary, we remove it to have equal number of gets ans puts,
      and free allocated memory after refcount reach 0.
      
      Fixes: 5920cda6 (usb: gadget: FunctionFS: convert to new function
      	interface with backward compatibility)
      Cc: <stable@vger.kernel.org> # v3.14+
      Signed-off-by: default avatarRobert Baldyga <r.baldyga@samsung.com>
      Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
      a3058a5d
    • Geert Uytterhoeven's avatar
      usb: gadget: udc: USB_GADGET_XILINX should depend on HAS_DMA · f1113be1
      Geert Uytterhoeven authored
      If NO_DMA=y:
      
      drivers/built-in.o: In function `xudc_done':
      udc-xilinx.c:(.text+0x54f4d2): undefined reference to `usb_gadget_unmap_request'
      drivers/built-in.o: In function `xudc_dma_send':
      udc-xilinx.c:(.text+0x54f9f8): undefined reference to `dma_sync_single_for_cpu'
      drivers/built-in.o: In function `xudc_read_fifo':
      udc-xilinx.c:(.text+0x54ff4a): undefined reference to `dma_sync_single_for_cpu'
      drivers/built-in.o: In function `xudc_ep_queue':
      udc-xilinx.c:(.text+0x550e7c): undefined reference to `usb_gadget_map_request'
      Signed-off-by: default avatarGeert Uytterhoeven <geert@linux-m68k.org>
      Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
      f1113be1
    • Roger Quadros's avatar
      Revert "usb: dwc3: dwc3-omap: Disable/Enable only wrapper interrupts in prepare/complete" · b01ff5cb
      Roger Quadros authored
      This reverts commit 02dae36a.
      
      That commit is bogus in two ways:
      
      1) There's no way dwc3-omap's ->suspend() can cause any effect
      	on xhci's ->suspend(). Linux device driver model guarantees
      	that a parent's ->suspend() will only be called after all
      	children are suspended. dwc3-omap is the parent of the
      	parent of xhci.
      
      2) When implementing Deep Sleep states where context is lost,
      	USBOTGSS_IRQ0 register, well, looses context so we
      	_must_ rewrite it otherwise core IRQs will never be
      	reenabled and USB will appear to be dead.
      
      Fixes: 02dae36a (usb: dwc3: dwc3-omap: Disable/Enable only
      	wrapper interrupts in prepare/complete)
      Cc: <stable@vger.kernel.org> # v3.17
      Cc: George Cherian <george.cherian@ti.com>
      Signed-off-by: default avatarRoger Quadros <rogerq@ti.com>
      Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
      b01ff5cb
    • Felipe Balbi's avatar
      usb: gadget: composite: enable BESL support · a6615937
      Felipe Balbi authored
      According to USB 2.0 ECN Errata for Link Power
      Management (USB2-LPM-Errata-final.pdf), BESL
      must be enabled if LPM is enabled.
      
      This helps with USB30CV TD 9.21 LPM L1
      Suspend Resume Test.
      Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
      a6615937
    • Thomas Gleixner's avatar
      usb: musb: cppi41: restart hrtimer only if not yet done · d2e6d62c
      Thomas Gleixner authored
      commit c58d80f5 ("usb: musb: Ensure that cppi41 timer gets armed on
      premature DMA TX irq") fixed hrtimer scheduling bug. There is one left
      which does not trigger that often.
      The following scenario is still possible:
      
          lock(&x->lock);
          hrtimer_start(&x->t);
          unlock(&x->lock);
      
      expires:
          t->function();
                                      lock(&x->lock);
          lock(&x->lock);             if (!hrtimer_queued(&x->t))
                                              hrtimer_start(&x->t);
                                      unlock(&x->lock);
      
          if (!list_empty(x->early_tx_list))
                 ret = HRTIMER_RESTART;
      ->         hrtimer_forward_now(...)
          } else
                 ret = HRTIMER_NORESTART;
      
          unlock(&x->lock);
      
      and the timer callback returns HRTIMER_RESTART for an armed timer. This
      is wrong and we run into the BUG_ON() in __run_hrtimer().
      This can happens on SMP or PREEMPT-RT.
      The patch fixes the problem by only starting the timer if the timer is
      not yet queued.
      
      Cc: stable@vger.kernel.org
      Reported-by: default avatarTorben Hohn <torbenh@linutronix.de>
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      [bigeasy: collected information and created a patch + description based
                on it]
      Signed-off-by: default avatarSebastian Andrzej Siewior <bigeasy@linutronix.de>
      Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
      d2e6d62c
    • Felipe Balbi's avatar
      usb: dwc3: ep0: fix Data Phase for transfer sizes aligned to wMaxPacketSize · 36f84ffb
      Felipe Balbi authored
      According to Section 8.5.3.2 of the USB 2.0 specification,
      a USB device must terminate a Data Phase with either a
      short packet or a ZLP (if the previous transfer was
      a multiple of wMaxPacketSize).
      
      For reference, here's what the USB 2.0 specification, section
      8.5.3.2 says:
      
      "
      8.5.3.2 Variable-length Data Stage
      
      A control pipe may have a variable-length data phase
      in which the host requests more data than is contained
      in the specified data structure. When all of the data
      structure is returned to the host, the function should
      indicate that the Data stage is ended by returning a
      packet that is shorter than the MaxPacketSize for the
      pipe. If the data structure is an exact multiple of
      wMaxPacketSize for the pipe, the function will return
      a zero-length packet to indicate the end of the Data
      stage.
      "
      Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
      36f84ffb
  2. 20 Oct, 2014 19 commits
    • Felipe Balbi's avatar
      usb: dwc3: ep0: return early on NULL requests · 6856d30c
      Felipe Balbi authored
      if our list of requests is empty, return early.
      
      There's really nothing to be done in case our
      request list is empty anyway because the only
      situation where we our list is empty, is when
      we're transferring ZLPs.
      Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
      6856d30c
    • Alan Cox's avatar
      usb: dwc3: pci: Add PCI ID for Intel Braswell · 7d643664
      Alan Cox authored
      The device controller is the same but it has different PCI ID. Add this new
      ID to the driver's list of supported IDs.
      Signed-off-by: default avatarAlan Cox <alan@linux.intel.com>
      Signed-off-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
      Signed-off-by: default avatarHeikki Krogerus <heikki.krogerus@linux.intel.com>
      Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
      7d643664
    • Felipe Balbi's avatar
      usb: gadget: function: f_obex: fix Interface Descriptor Test · 3985f3ab
      Felipe Balbi authored
      On USB20CV's Interface Descriptor Test, a series
      of SetInterface/GetInterface requests are issued
      and gadget driver is required to always return
      correct alternate setting.
      
      In one step of the test, g_serial with f_obex
      was returning the wrong value (1 instead of 0).
      
      In order to fix this, we will now hold currently
      selected alternate setting inside our struct f_obex
      and just return that from our ->get_alt()
      implementation.
      
      Note that his also simplifies the code a bit.
      Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
      3985f3ab
    • Felipe Balbi's avatar
      usb: gadget: function: uac2: add a release method · de1e6e79
      Felipe Balbi authored
      devices are required to provide a release method. This
      patch fixes the following WARN():
      
      [   42.611159] ------------[ cut here ]------------
      [   42.616025] WARNING: CPU: 0 PID: 1453 at drivers/base/core.c:250 device_release+0x94/0xa0()
      [   42.624820] Device 'snd_uac2.0' does not have a release() function, it is broken and must be fixed.
      [   42.634328] Modules linked in: usb_f_uac2 g_audio(-) libcomposite configfs xhci_hcd snd_soc_davinci_mcasp snd_soc_edma snd_soc_tlv320aic3x snd_soc_omap snd_soc_evm snd_soc_core dwc3 snd_compress omapdrm snd_pcm_dmaengine snd_pcm snd_timer snd fb_sys_fops lis3lv02d_i2c matrix_keypad dwc3_omap lis3lv02d panel_dpi input_polldev soundcore
      [   42.665687] CPU: 0 PID: 1453 Comm: modprobe Tainted: G      D        3.17.0-rc6-00448-g9f3d0ec-dirty #188
      [   42.675756] [<c0017338>] (unwind_backtrace) from [<c0012fdc>] (show_stack+0x20/0x24)
      [   42.683911] [<c0012fdc>] (show_stack) from [<c0647fbc>] (dump_stack+0x8c/0xa4)
      [   42.691526] [<c0647fbc>] (dump_stack) from [<c0049950>] (warn_slowpath_common+0x7c/0xa0)
      [   42.700004] [<c0049950>] (warn_slowpath_common) from [<c00499b4>] (warn_slowpath_fmt+0x40/0x48)
      [   42.709194] [<c00499b4>] (warn_slowpath_fmt) from [<c0405f7c>] (device_release+0x94/0xa0)
      [   42.717794] [<c0405f7c>] (device_release) from [<c032e8e8>] (kobject_cleanup+0x4c/0x7c)
      [   42.726189] [<c032e8e8>] (kobject_cleanup) from [<c032e7c8>] (kobject_put+0x60/0x90)
      [   42.734316] [<c032e7c8>] (kobject_put) from [<c0406320>] (put_device+0x24/0x28)
      [   42.741995] [<c0406320>] (put_device) from [<c040c008>] (platform_device_unregister+0x2c/0x30)
      [   42.751061] [<c040c008>] (platform_device_unregister) from [<bf2b6b70>] (afunc_unbind+0x2c/0x68 [usb_f_uac2])
      [   42.761523] [<bf2b6b70>] (afunc_unbind [usb_f_uac2]) from [<bf29dbec>] (remove_config.isra.8+0xe8/0x100 [libcomposite])
      [   42.772868] [<bf29dbec>] (remove_config.isra.8 [libcomposite]) from [<bf29f9a4>] (__composite_unbind+0x48/0xb0 [libcomposite])
      [   42.784855] [<bf29f9a4>] (__composite_unbind [libcomposite]) from [<bf29fa28>] (composite_unbind+0x1c/0x20 [libcomposite])
      [   42.796446] [<bf29fa28>] (composite_unbind [libcomposite]) from [<c04d229c>] (usb_gadget_remove_driver+0x78/0xb0)
      [   42.807224] [<c04d229c>] (usb_gadget_remove_driver) from [<c04d2348>] (usb_gadget_unregister_driver+0x74/0xb8)
      [   42.817742] [<c04d2348>] (usb_gadget_unregister_driver) from [<bf29db00>] (usb_composite_unregister+0x1c/0x20 [libcomposite])
      [   42.829632] [<bf29db00>] (usb_composite_unregister [libcomposite]) from [<bf2b1084>] (audio_driver_exit+0x14/0x1c [g_audio])
      [   42.841430] [<bf2b1084>] (audio_driver_exit [g_audio]) from [<c00c0fe0>] (SyS_delete_module+0x120/0x1b0)
      [   42.851415] [<c00c0fe0>] (SyS_delete_module) from [<c000ed40>] (ret_fast_syscall+0x0/0x48)
      [   42.860075] ---[ end trace bb22e678d8d6db7b ]---
      root@saruman:~#
      Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
      de1e6e79
    • Felipe Balbi's avatar
      usb: gadget: function: uac2: prevent double ep disable · f3bb7b29
      Felipe Balbi authored
      without this check, f_uac2 would try to disable
      the same endpoint twice. Fix that.
      Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
      f3bb7b29
    • Felipe Balbi's avatar
      usb: gadget: function: uac2: add wMaxPacketSize to ep desc · 703a303c
      Felipe Balbi authored
      Endpoint descriptors should pass wMaxPacketSize. Note
      that this also fixes USB20CV Other Speed Endpoint
      Descriptor Tests.
      Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
      703a303c
    • Felipe Balbi's avatar
      usb: gadget: function: uvc: disable endpoints on ->disable() · e3122f5f
      Felipe Balbi authored
      when our ->disable() method is called, we must
      make sure to teardown all our resources, including
      endpoints.
      Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
      e3122f5f
    • Felipe Balbi's avatar
      usb: gadget: function: uvc: manage our video control endpoint · 62e37078
      Felipe Balbi authored
      just like any other endpoint, we must enable/disable
      our video control endpoint based on calls to our
      ->set_alt() method.
      Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
      62e37078
    • Felipe Balbi's avatar
      usb: gadget: function: acm: make f_acm pass USB20CV Chapter9 · 52ec49a5
      Felipe Balbi authored
      During Halt Endpoint Test, our interrupt endpoint
      will be disabled, which will clear out ep->desc
      to NULL. Unless we call config_ep_by_speed() again,
      we will not be able to enable this endpoint which
      will make us fail that test.
      
      Fixes: f9c56cdd (usb: gadget: Clear usb_endpoint_descriptor
      	inside the struct usb_ep on disable)
      Cc: <stable@vger.kernel.org> # v3.4+
      Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
      52ec49a5
    • Felipe Balbi's avatar
      usb: gadget: function: uvc: return correct alt-setting · e975be28
      Felipe Balbi authored
      If our alternate setting has been selected, we must
      return that on a subsequent Get Interface request
      even if we're not streaming.
      Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
      e975be28
    • Felipe Balbi's avatar
      usb: gadget: function: uvc: make sure to balance ep enable/disable · c92bae75
      Felipe Balbi authored
      If a set_alt() to the same alternate setting that's
      already selected is received, functions are required
      to reset the interface state, this means we must disable
      all endpoints and reenable them again.
      
      This is also documented on our kdoc for struct usb_function
      
      * @set_alt: (REQUIRED) Reconfigures altsettings; function drivers may
      *	initialize usb_ep.driver data at this time (when it is used).
      *	Note that setting an interface to its current altsetting resets
      *	interface state, and that all interfaces have a disabled state.
      Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
      c92bae75
    • Felipe Balbi's avatar
      usb: gadget: function: uvc: conditionally dequeue · d7577b38
      Felipe Balbi authored
      We shouldn't try to dequeue a NULL pointer.
      Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
      d7577b38
    • Felipe Balbi's avatar
      usb: dwc3: gadget: fix set_halt() bug with pending transfers · 7a608559
      Felipe Balbi authored
      According to our Gadget Framework API documentation,
      ->set_halt() *must* return -EAGAIN if we have pending
      transfers (on either direction) or FIFO isn't empty (on
      TX endpoints).
      
      Fix this bug so that the mass storage gadget can be used
      without stall=0 parameter.
      
      This patch should be backported to all kernels since v3.2.
      
      Cc: <stable@vger.kernel.org> # v3.2+
      Suggested-by: default avatarAlan Stern <stern@rowland.harvard.edu>
      Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
      7a608559
    • Felipe Balbi's avatar
      usb: dwc3: gadget: hold the lock through set_wedge()'s life · 95aa4e8d
      Felipe Balbi authored
      Instead of releasing the lock and calling locked
      versions of our set_halt() methods, let's hold
      the lock all the way through and call unlocked
      versions of those functions.
      Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
      95aa4e8d
    • Felipe Balbi's avatar
      usb: dwc3: gadget: move isoc endpoint check to unlocked set_halt · 5ad02fb8
      Felipe Balbi authored
      __dwc3_gadget_ep_set_halt() is the function which
      handles the actual halt feature. In order to cope
      with some extra cleanup comming as a follow-up patch
      let's move the isochronous endpoint check there too.
      Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
      5ad02fb8
    • Felipe Balbi's avatar
      usb: dwc3: ep0: hold our lock in dwc3_gadget_ep0_set_halt · 33fb691b
      Felipe Balbi authored
      dwc3_gadget_ep0_set_halt() will be called without
      locks held in some cases, so we must hold the lock
      on our own. While at that, also add a version without
      locks to be called in certain conditions.
      Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
      33fb691b
    • Felipe Balbi's avatar
      usb: dwc3: trace: don't dereference pointers · 4ac4fc93
      Felipe Balbi authored
      The way trace works is that it won't decode strings
      until we read the actual trace. Because of that, we
      can't make assumptions of pointers still being valid
      at the time we read the trace. In order to avoid that,
      just copy all fields from every struct pointer we need
      for our traces.
      
      Ths patch fixes the following bug:
      
      [ 2940.039229] Unable to handle kernel paging request at virtual address 814efa9e
      [ 2940.046904] pgd = ec3dc000
      [ 2940.049737] [814efa9e] *pgd=00000000
      [ 2940.053552] Internal error: Oops: 5 [#1] SMP ARM
      [ 2940.058379] Modules linked in: usb_f_acm u_serial g_serial usb_f_uac2 libcomposite configfs xhci_hcd dwc3 udc_core matrix_keypad dwc3_omap lis3lv02d_i2c lis3lv02d input_polldev [last unloaded: g_audio]
      [ 2940.077238] CPU: 0 PID: 3020 Comm: tail Tainted: G        W
      3.17.0-rc5-dirty #1097
      [ 2940.085596] task: ed1b1040 ti: ed07c000 task.ti: ed07c000
      [ 2940.091258] PC is at strnlen+0x18/0x68
      [ 2940.095177] LR is at 0xfffffffe
      [ 2940.098454] pc : [<c0356df8>]    lr : [<fffffffe>]    psr: a0000013
      [ 2940.098454] sp : ed07ddb0  ip : ed07ddc0  fp : ed07ddbc
      [ 2940.110445] r10: c070ff70  r9 : ed07de70  r8 : 00000000
      [ 2940.115906] r7 : 814efa9e  r6 : ffffffff  r5 : ed4b6087  r4 : ed4b50c7
      [ 2940.122726] r3 : 00000000  r2 : 814efa9e  r1 : ffffffff  r0 : 814efa9e
      [ 2940.129546] Flags: NzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM Segment user
      [ 2940.137000] Control: 10c5387d  Table: ac3dc059  DAC: 00000015
      [ 2940.143006] Process tail (pid: 3020, stack limit = 0xed07c248)
      [ 2940.149098] Stack: (0xed07ddb0 to 0xed07e000)
      [ 2940.153660] dda0:                                     ed07dde4 ed07ddc0 c0359628 c0356dec
      [ 2940.162203] ddc0: 00000000 ed4b50c7 bf03ae9c ed4b6087 bf03ae9e 00000002 ed07de3c ed07dde8
      [ 2940.170740] dde0: c035ab50 c0359600 ffffffff ffffffff ff0a0000 ffffffff ed07de30 ed4b5088
      [ 2940.179275] de00: ed4b50c7 00000fc0 ff0a0004 ffffffff ed4b5088 ed4b5088 00000000 00001000
      [ 2940.187810] de20: 00001008 00000fc0 ed4b5088 00000000 ed07de68 ed07de40 c00f1e64 c035a9c4
      [ 2940.196341] de40: bf03dae0 ed07de70 ed4b4000 ec25b280 ed4b4000 ec25b280 bf03dae0 ed07de9c
      [ 2940.204886] de60: ed07de78 bf033324 c00f1e0c bf03ae9c 814efa9e ed428bc0 814eca3e 00000000
      [ 2940.213428] de80: 814eba3e ed4b4000 03bd1201 c0c34790 ed07ded4 ed07dea0 c00edc0c bf0332d0
      [ 2940.221994] dea0: 000002c7 ed07df10 ed07decc ed07deb8 ed4b4000 0000209c ec278ac0 00000000
      [ 2940.230536] dec0: 00002000 ec0db340 ed07def4 ed07ded8 c00ee7ec c00eda90 c00ee7b0 ec278ac0
      [ 2940.239075] dee0: ed4b4000 000002d5 ed07df44 ed07def8 c018b8d0 c00ee7bc c0166d3c ec278af0
      [ 2940.247621] df00: 0001f090 ed07df78 000002c7 00000000 000002c8 00000000 00000000 ec0db340
      [ 2940.256173] df20: 0001f090 ed07df78 ec0db340 00002000 0001f090 00000000 ed07df74 ed07df48
      [ 2940.264729] df40: c0166e98 c018b5f4 00000001 c018535c 000168c1 00000000 ec0db340 ec0db340
      [ 2940.273284] df60: 00002000 0001f090 ed07dfa4 ed07df78 c01675c4 c0166e0c 000168c1 00000000
      [ 2940.281829] df80: 00002000 0000000a 0001f090 00000003 c000f064 ed07c000 00000000 ed07dfa8
      [ 2940.290365] dfa0: c000ede0 c0167584 00002000 0000000a 00000003 0001f090 00002000 00000000
      [ 2940.298909] dfc0: 00002000 0000000a 0001f090 00000003 7fffe000 0001e1e0 00002004 0000002f
      [ 2940.307445] dfe0: 00000000 beed38ec 000104c8 b6e6397c 40000010 00000003 00000000 00000000
      [ 2940.315992] [<c0356df8>] (strnlen) from [<c0359628>] (string.isra.8+0x34/0xe8)
      [ 2940.323534] [<c0359628>] (string.isra.8) from [<c035ab50>] (vsnprintf+0x198/0x3fc)
      [ 2940.331461] [<c035ab50>] (vsnprintf) from [<c00f1e64>] (trace_seq_printf+0x68/0x94)
      [ 2940.339494] [<c00f1e64>] (trace_seq_printf) from [<bf033324>] (ftrace_raw_output_dwc3_log_request+0x60/0x78 [dwc3])
      [ 2940.350424] [<bf033324>] (ftrace_raw_output_dwc3_log_request [dwc3]) from [<c00edc0c>] (print_trace_line+0x188/0x418)
      [ 2940.361507] [<c00edc0c>] (print_trace_line) from [<c00ee7ec>] (s_show+0x3c/0x12c)
      [ 2940.369330] [<c00ee7ec>] (s_show) from [<c018b8d0>] (seq_read+0x2e8/0x4a0)
      [ 2940.376519] [<c018b8d0>] (seq_read) from [<c0166e98>] (vfs_read+0x98/0x158)
      [ 2940.383796] [<c0166e98>] (vfs_read) from [<c01675c4>] (SyS_read+0x4c/0xa0)
      [ 2940.390981] [<c01675c4>] (SyS_read) from [<c000ede0>] (ret_fast_syscall+0x0/0x48)
      [ 2940.398792] Code: e24cb004 e3510000 e241e001 0a000011 (e5d01000)
      [ 2940.406980] ---[ end trace d8b38370fbb531f3 ]---
      Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
      4ac4fc93
    • Linus Torvalds's avatar
      Linux 3.18-rc1 · f114040e
      Linus Torvalds authored
      f114040e
    • Linus Torvalds's avatar
      Merge tag 'arm-soc-fixes-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc · 4d3639ac
      Linus Torvalds authored
      Pull ARM SoC fixes from Olof Johansson:
       "A batch of fixes that have come in during the merge window.
      
        Some of them are defconfig updates for things that have now landed,
        some errata additions and a few general scattered fixes.
      
        There's also a qcom DT update that adds support for SATA on AP148, and
        basic support for Sony Xperia Z1 and CM-QS600 platforms that seemed
        isolated enough that we could merge it even if it's late"
      
      * tag 'arm-soc-fixes-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
        MAINTAINERS: corrected bcm2835 search
        ARM: dts: Explicitly set dr_mode on exynos5420-arndale-octa
        ARM: dts: Explicitly set dr_mode on exynos Peach boards
        ARM: dts: qcom: add CM-QS600 board
        ARM: dts: qcom: Add initial DTS file for Sony Xperia Z1 phone
        ARM: dts: qcom: Add SATA support on IPQ8064/AP148
        MAINTAINERS: Update Santosh Shilimkar's email id
        ARM: sunxi_defconfig: enable CONFIG_REGULATOR
        ARM: dts: Disable smc91x on n900 until bootloader dependency is removed
        ARM: omap2plus_defconfig: Enable ARM erratum 430973 for omap3
        ARM: exynos_defconfig: enable USB gadget support
        ARM: exynos_defconfig: Enable Maxim 77693 and I2C GPIO drivers
        ARM: mm: Fix ifdef around cpu_*_do_[suspend, resume] ops
        ARM: EXYNOS: Fix build with PM_SLEEP=n and ARM_EXYNOS_CPUIDLE=n
        ARM: SAMSUNG: Restore Samsung PM Debug functionality
        ARM: dts: Fix pull setting in sd4_width8 pin group for exynos4x12
        ARM: exynos_defconfig: Enable SBS battery support
        ARM: exynos_defconfig: Enable Control Groups support
        ARM: exynos_defconfig: Enable Atmel maXTouch support
        ARM: exynos_defconfig: Enable MAX77802
      4d3639ac
  3. 19 Oct, 2014 10 commits
    • Linus Torvalds's avatar
      Merge git://git.infradead.org/users/eparis/audit · ab074ade
      Linus Torvalds authored
      Pull audit updates from Eric Paris:
       "So this change across a whole bunch of arches really solves one basic
        problem.  We want to audit when seccomp is killing a process.  seccomp
        hooks in before the audit syscall entry code.  audit_syscall_entry
        took as an argument the arch of the given syscall.  Since the arch is
        part of what makes a syscall number meaningful it's an important part
        of the record, but it isn't available when seccomp shoots the
        syscall...
      
        For most arch's we have a better way to get the arch (syscall_get_arch)
        So the solution was two fold: Implement syscall_get_arch() everywhere
        there is audit which didn't have it.  Use syscall_get_arch() in the
        seccomp audit code.  Having syscall_get_arch() everywhere meant it was
        a useless flag on the stack and we could get rid of it for the typical
        syscall entry.
      
        The other changes inside the audit system aren't grand, fixed some
        records that had invalid spaces.  Better locking around the task comm
        field.  Removing some dead functions and structs.  Make some things
        static.  Really minor stuff"
      
      * git://git.infradead.org/users/eparis/audit: (31 commits)
        audit: rename audit_log_remove_rule to disambiguate for trees
        audit: cull redundancy in audit_rule_change
        audit: WARN if audit_rule_change called illegally
        audit: put rule existence check in canonical order
        next: openrisc: Fix build
        audit: get comm using lock to avoid race in string printing
        audit: remove open_arg() function that is never used
        audit: correct AUDIT_GET_FEATURE return message type
        audit: set nlmsg_len for multicast messages.
        audit: use union for audit_field values since they are mutually exclusive
        audit: invalid op= values for rules
        audit: use atomic_t to simplify audit_serial()
        kernel/audit.c: use ARRAY_SIZE instead of sizeof/sizeof[0]
        audit: reduce scope of audit_log_fcaps
        audit: reduce scope of audit_net_id
        audit: arm64: Remove the audit arch argument to audit_syscall_entry
        arm64: audit: Add audit hook in syscall_trace_enter/exit()
        audit: x86: drop arch from __audit_syscall_entry() interface
        sparc: implement is_32bit_task
        sparc: properly conditionalize use of TIF_32BIT
        ...
      ab074ade
    • Olof Johansson's avatar
      Merge tag 'qcom-dt-for-3.18-3' of... · 57764512
      Olof Johansson authored
      Merge tag 'qcom-dt-for-3.18-3' of git://git.kernel.org/pub/scm/linux/kernel/git/galak/linux-qcom into fixes
      
      Merge "qcom DT changes for v3.18-3" from Kumar Gala:
      
      Qualcomm ARM Based Device Tree Updates for v3.18-3
      
      * Added Board support for CM-QS600 and Sony Xperia Z1 phone
      * Added SATA support on IPQ8064/AP148
      
      * tag 'qcom-dt-for-3.18-3' of git://git.kernel.org/pub/scm/linux/kernel/git/galak/linux-qcom:
        ARM: dts: qcom: add CM-QS600 board
        ARM: dts: qcom: Add initial DTS file for Sony Xperia Z1 phone
        ARM: dts: qcom: Add SATA support on IPQ8064/AP148
      57764512
    • Olof Johansson's avatar
      Merge tag 'samsung-fixes-2' of... · e29c6486
      Olof Johansson authored
      Merge tag 'samsung-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into fixes
      
      Pull more fixes from Kukjin Kim:
      
      2nd Samsung fixes for v3.18
      - Explicitly set dr_mode on exynos5800-peach-pi, exynos5420-peach-pit
        and exynos5420-arndale-octa boards, because the USB dwc3 controller
        will not work properly without dr_mode as host on above boards if
        the USB host and gadget are enabled in kernel configuration both.
      
      * tag 'samsung-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
        ARM: dts: Explicitly set dr_mode on exynos5420-arndale-octa
        ARM: dts: Explicitly set dr_mode on exynos Peach boards
      Signed-off-by: default avatarOlof Johansson <olof@lixom.net>
      e29c6486
    • Scott Branden's avatar
      MAINTAINERS: corrected bcm2835 search · 9209bec4
      Scott Branden authored
      Corrected bcm2835 maintainer info by using N: to specify any files with
      bcm2835 in are directed to the proper maintainer.
      Also corrected minor mispelling of ARCHITECTURE in 2 comment locations.
      Signed-off-by: default avatarScott Branden <sbranden@broadcom.com>
      Signed-off-by: default avatarStephen Warren <swarren@wwwdotorg.org>
      Signed-off-by: default avatarOlof Johansson <olof@lixom.net>
      9209bec4
    • Linus Torvalds's avatar
      Merge tag 'ntb-3.18' of git://github.com/jonmason/ntb · 61ed53de
      Linus Torvalds authored
      Pull ntb (non-transparent bridge) updates from Jon Mason:
       "Add support for Haswell NTB split BARs, a debugfs entry for basic
        debugging info, and some code clean-ups"
      
      * tag 'ntb-3.18' of git://github.com/jonmason/ntb:
        ntb: Adding split BAR support for Haswell platforms
        ntb: use errata flag set via DID to implement workaround
        ntb: conslidate reading of PPD to move platform detection earlier
        ntb: move platform detection to separate function
        NTB: debugfs device entry
      61ed53de
    • Linus Torvalds's avatar
      Merge branch 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux · 278f1d07
      Linus Torvalds authored
      Pull i2c updates from Wolfram Sang:
       "Highlights from the I2C subsystem for 3.18:
      
         - new drivers for Axxia AM55xx, and Hisilicon hix5hd2 SoC.
      
         - designware driver gained AMD support, exynos gained exynos7 support
      
        The rest is usual driver stuff.  Hopefully no lowlights this time"
      
      * 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
        i2c: i801: Add Device IDs for Intel Sunrise Point PCH
        i2c: hix5hd2: add i2c controller driver
        i2c-imx: Disable the clock on probe failure
        i2c: designware: Add support for AMD I2C controller
        i2c: designware: Rework probe() to get clock a bit later
        i2c: designware: Default to fast mode in case of ACPI
        i2c: axxia: Add I2C driver for AXM55xx
        i2c: exynos: add support for HSI2C module on Exynos7
        i2c: mxs: detect No Slave Ack on SELECT in PIO mode
        i2c: cros_ec: Remove EC_I2C_FLAG_10BIT
        i2c: cros-ec-tunnel: Add of match table
        i2c: rcar: remove sign-compare flaw
        i2c: ismt: Use minimum descriptor size
        i2c: imx: Add arbitration lost check
        i2c: rk3x: Remove unlikely() annotations
        i2c: rcar: check for no IRQ in rcar_i2c_irq()
        i2c: rcar: make rcar_i2c_prepare_msg() *void*
        i2c: rcar: simplify check for last message
        i2c: designware: add support of platform data to set I2C mode
        i2c: designware: add support of I2C standard mode
      278f1d07
    • Linus Torvalds's avatar
      Merge tag 'sound-fix-3.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound · d590c6cd
      Linus Torvalds authored
      Pull sound fixes from Takashi Iwai:
       "Here are a collection of small fixes after 3.18 merge.
      
        The urgent one is the fix for kernel panics with linked PCM substream
        triggered by the recent nonatomic PCM ops support.  Other two fixes
        (emu10k1 and bebob) are stable fixes, and one easy PCI ID addition for
        a new Intel HD-audio controller"
      
      * tag 'sound-fix-3.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
        ALSA: hda_intel: Add Device IDs for Intel Sunrise Point PCH
        ALSA: emu10k1: Fix deadlock in synth voice lookup
        ALSA: pcm: Fix referred substream in snd_pcm_action_group() unlock loop
        ALSA: bebob: Fix failure to detect source of clock for Terratec Phase 88
      d590c6cd
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input · fb378df5
      Linus Torvalds authored
      Pull second round of input updates from Dmitry Torokhov:
       "Mostly simple bug fixes, although we do have one brand new driver for
        Microchip AR1021 i2c touchscreen.
      
        Also there is the change to stop trying to use i8042 active
        multiplexing by default (it is still possible to activate it via
        i8042.nomux=0 on boxes that implement it)"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
        Input: xpad - add Thrustmaster as Xbox 360 controller vendor
        Input: xpad - add USB ID for Thrustmaster Ferrari 458 Racing Wheel
        Input: max77693-haptic - fix state check in imax77693_haptic_disable()
        Input: xen-kbdfront - free grant table entry in xenkbd_disconnect_backend
        Input: alps - fix v4 button press recognition
        Input: i8042 - disable active multiplexing by default
        Input: i8042 - add noloop quirk for Asus X750LN
        Input: synaptics - gate forcepad support by DMI check
        Input: Add Microchip AR1021 i2c touchscreen
        Input: cros_ec_keyb - add of match table
        Input: serio - avoid negative serio device numbers
        Input: avoid negative input device numbers
        Input: automatically set EV_ABS bit in input_set_abs_params
        Input: adp5588-keys - cancel workqueue in failure path
        Input: opencores-kbd - switch to using managed resources
        Input: evdev - fix EVIOCG{type} ioctl
      fb378df5
    • Linus Torvalds's avatar
      Merge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband · 2eb7f910
      Linus Torvalds authored
      Pull infiniband/RDMA updates from Roland Dreier:
       - large set of iSER initiator improvements
       - hardware driver fixes for cxgb4, mlx5 and ocrdma
       - small fixes to core midlayer
      
      * tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: (47 commits)
        RDMA/cxgb4: Fix ntuple calculation for ipv6 and remove duplicate line
        RDMA/cxgb4: Add missing neigh_release in find_route
        RDMA/cxgb4: Take IPv6 into account for best_mtu and set_emss
        RDMA/cxgb4: Make c4iw_wr_log_size_order static
        IB/core: Fix XRC race condition in ib_uverbs_open_qp
        IB/core: Clear AH attr variable to prevent garbage data
        RDMA/ocrdma: Save the bit environment, spare unncessary parenthesis
        RDMA/ocrdma: The kernel has a perfectly good BIT() macro - use it
        RDMA/ocrdma: Don't memset() buffers we just allocated with kzalloc()
        RDMA/ocrdma: Remove a unused-label warning
        RDMA/ocrdma: Convert kernel VA to PA for mmap in user
        RDMA/ocrdma: Get vlan tag from ib_qp_attrs
        RDMA/ocrdma: Add default GID at index 0
        IB/mlx5, iser, isert: Add Signature API additions
        Target/iser: Centralize ib_sig_domain setting
        IB/iser: Centralize ib_sig_domain settings
        IB/mlx5: Use extended internal signature layout
        IB/iser: Set IP_CSUM as default guard type
        IB/iser: Remove redundant assignment
        IB/mlx5: Use enumerations for PI copy mask
        ...
      2eb7f910
    • Linus Torvalds's avatar
      Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 1f6075f9
      Linus Torvalds authored
      Pull more perf updates from Ingo Molnar:
       "A second (and last) round of late coming fixes and changes, almost all
        of them in perf tooling:
      
        User visible tooling changes:
      
         - Add period data column and make it default in 'perf script' (Jiri
           Olsa)
      
         - Add a visual cue for toggle zeroing of samples in 'perf top'
           (Taeung Song)
      
         - Improve callchains when using libunwind (Namhyung Kim)
      
        Tooling fixes and infrastructure changes:
      
         - Fix for double free in 'perf stat' when using some specific invalid
           command line combo (Yasser Shalabi)
      
         - Fix off-by-one bugs in map->end handling (Stephane Eranian)
      
         - Fix off-by-one bug in maps__find(), also related to map->end
           handling (Namhyung Kim)
      
         - Make struct symbol->end be the first addr after the symbol range,
           to make it match the convention used for struct map->end.  (Arnaldo
           Carvalho de Melo)
      
         - Fix perf_evlist__add_pollfd() error handling in 'perf kvm stat
           live' (Jiri Olsa)
      
         - Fix python test build by moving callchain_param to an object linked
           into the python binding (Jiri Olsa)
      
         - Document sysfs events/ interfaces (Cody P Schafer)
      
         - Fix typos in perf/Documentation (Masanari Iida)
      
         - Add missing 'struct option' forward declaration (Arnaldo Carvalho
           de Melo)
      
         - Add option to copy events when queuing for sorting across cpu
           buffers and enable it for 'perf kvm stat live', to avoid having
           events left in the queue pointing to the ring buffer be rewritten
           in high volume sessions.  (Alexander Yarygin, improving work done
           by David Ahern):
      
         - Do not include a struct hists per perf_evsel, untangling the
           histogram code from perf_evsel, to pave the way for exporting a
           minimalistic tools/lib/api/perf/ library usable by tools/perf and
           initially by the rasd daemon being developed by Borislav Petkov,
           Robert Richter and Jean Pihet.  (Arnaldo Carvalho de Melo)
      
         - Make perf_evlist__open(evlist, NULL, NULL), i.e. without cpu and
           thread maps mean syswide monitoring, reducing the boilerplate for
           tools that only want system wide mode.  (Arnaldo Carvalho de Melo)
      
         - Move exit stuff from perf_evsel__delete to perf_evsel__exit, delete
           should be just a front end for exit + free (Arnaldo Carvalho de
           Melo)
      
         - Add support to new style format of kernel PMU event.  (Kan Liang)
      
        and other misc fixes"
      
      * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (45 commits)
        perf script: Add period as a default output column
        perf script: Add period data column
        perf evsel: No need to drag util/cgroup.h
        perf evlist: Add missing 'struct option' forward declaration
        perf evsel: Move exit stuff from __delete to __exit
        kprobes/x86: Remove stale ARCH_SUPPORTS_KPROBES_ON_FTRACE define
        perf kvm stat live: Enable events copying
        perf session: Add option to copy events when queueing
        perf Documentation: Fix typos in perf/Documentation
        perf trace: Use thread_{,_set}_priv helpers
        perf kvm: Use thread_{,_set}_priv helpers
        perf callchain: Create an address space per thread
        perf report: Set callchain_param.record_mode for future use
        perf evlist: Fix for double free in tools/perf stat
        perf test: Add test case for pmu event new style format
        perf tools: Add support to new style format of kernel PMU event
        perf tools: Parse the pmu event prefix and suffix
        Revert "perf tools: Default to cpu// for events v5"
        perf Documentation: Remove Ruplicated docs for powerpc cpu specific events
        perf Documentation: sysfs events/ interfaces
        ...
      1f6075f9