1. 07 Feb, 2015 1 commit
    • Stephen Boyd's avatar
      clkdev: Always allocate a struct clk and call __clk_get() w/ CCF · 73e0e496
      Stephen Boyd authored
      of_clk_get_by_clkspec() returns a struct clk pointer but it
      doesn't create a new handle for the consumers when we're using
      the common clock framework. Instead it just returns whatever the
      clk provider hands out. When the consumers go to call clk_put()
      we get an Oops.
      
      Unable to handle kernel paging request at virtual address 00200200
      pgd = c0004000
      [00200200] *pgd=00000000
      Internal error: Oops: 805 [#1] PREEMPT SMP ARM
      Modules linked in:
      CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.19.0-rc1-00104-ga251361a-dirty #992
      Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
      task: ee00b000 ti: ee088000 task.ti: ee088000
      PC is at __clk_put+0x24/0xd0
      LR is at clk_prepare_lock+0xc/0xec
      pc : [<c03eef38>]    lr : [<c03ec1f4>]    psr: 20000153
      sp : ee089de8  ip : 00000000  fp : 00000000
      r10: ee02f480  r9 : 00000001  r8 : 00000000
      r7 : ee031cc0  r6 : ee089e08  r5 : 00000000  r4 : ee02f480
      r3 : 00100100  r2 : 00200200  r1 : 0000091e  r0 : 00000001
      Flags: nzCv  IRQs on  FIQs off  Mode SVC_32  ISA ARM  Segment kernel
      Control: 10c5387d  Table: 4000404a  DAC: 00000015
      Process swapper/0 (pid: 1, stack limit = 0xee088238)
      Stack: (0xee089de8 to 0xee08a000)
      9de0:                   ee7c8f14 c03f0ec8 ee089e08 00000000 c0718dc8 00000001
      9e00: 00000000 c04ee0f0 ee7e0844 00000001 00000181 c04edb58 ee2bd320 00000000
      9e20: 00000000 c011dc5c ee16a1e0 00000000 00000000 c0718dc8 ee16a1e0 ee2bd1e0
      9e40: c0641740 ee16a1e0 00000000 ee2bd320 c0718dc8 ee1d3e10 ee1d3e10 00000000
      9e60: c0769a88 00000000 c0718dc8 00000000 00000000 c02c3124 c02c310c ee1d3e10
      9e80: c07b4eec 00000000 c0769a88 c02c1d0c ee1d3e10 c0769a88 ee1d3e44 00000000
      9ea0: c07091dc c02c1eb8 00000000 c0769a88 c02c1e2c c02c0544 ee005478 ee1676c0
      9ec0: c0769a88 ee3a4e80 c0760ce8 c02c150c c0669b90 c0769a88 c0746cd8 c0769a88
      9ee0: c0746cd8 ee2bc4c0 c0778c00 c02c24e0 00000000 c0746cd8 c0746cd8 c07091f0
      9f00: 00000000 c0008944 c04f405c 00000025 ee00b000 60000153 c074ab00 00000000
      9f20: 00000000 c074ab90 60000153 00000000 ef7fca5d c050860c 000000b6 c0036b88
      9f40: c065ecc4 c06bc728 00000006 00000006 c074ab30 ef7fca40 c0739bdc 00000006
      9f60: c0718dbc c0778c00 000000b6 c0718dc8 c06ed598 c06edd64 00000006 00000006
      9f80: c06ed598 c003b438 00000000 c04e64f4 00000000 00000000 00000000 00000000
      9fa0: 00000000 c04e64fc 00000000 c000e838 00000000 00000000 00000000 00000000
      9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
      9fe0: 00000000 00000000 00000000 00000000 00000013 00000000 c0c0c0c0 c0c0c0c0
      [<c03eef38>] (__clk_put) from [<c03f0ec8>] (of_clk_set_defaults+0xe0/0x2c0)
      [<c03f0ec8>] (of_clk_set_defaults) from [<c02c3124>] (platform_drv_probe+0x18/0xa4)
      [<c02c3124>] (platform_drv_probe) from [<c02c1d0c>] (driver_probe_device+0x10c/0x22c)
      [<c02c1d0c>] (driver_probe_device) from [<c02c1eb8>] (__driver_attach+0x8c/0x90)
      [<c02c1eb8>] (__driver_attach) from [<c02c0544>] (bus_for_each_dev+0x54/0x88)
      [<c02c0544>] (bus_for_each_dev) from [<c02c150c>] (bus_add_driver+0xd4/0x1d0)
      [<c02c150c>] (bus_add_driver) from [<c02c24e0>] (driver_register+0x78/0xf4)
      [<c02c24e0>] (driver_register) from [<c07091f0>] (fimc_md_init+0x14/0x30)
      [<c07091f0>] (fimc_md_init) from [<c0008944>] (do_one_initcall+0x80/0x1d0)
      [<c0008944>] (do_one_initcall) from [<c06edd64>] (kernel_init_freeable+0x108/0x1d4)
      [<c06edd64>] (kernel_init_freeable) from [<c04e64fc>] (kernel_init+0x8/0xec)
      [<c04e64fc>] (kernel_init) from [<c000e838>] (ret_from_fork+0x14/0x3c)
      Code: ebfff4ae e5943014 e5942018 e3530000 (e5823000)
      
      Let's create a per-user handle here so that clk_put() can
      properly unlink it and free the handle. Now that we allocate a
      clk structure here we need to free it if __clk_get() fails so
      bury the __clk_get() call in __of_clk_get_from_provider(). We
      need to handle the same problem in clk_get_sys() so export
      __clk_free_clk() to clkdev.c and do the same thing, except let's
      use a union to make this code #ifdef free.
      
      This fixes the above crash, properly calls __clk_get() when
      of_clk_get_from_provider() is called, and cleans up the clk
      structure on the error path of clk_get_sys().
      
      Fixes: 035a61c3 "clk: Make clk API return per-user struct clk instances"
      Reported-by: default avatarSylwester Nawrocki <s.nawrocki@samsung.com>
      Reported-by: default avatarAlban Browaeys <alban.browaeys@gmail.com>
      Tested-by: default avatarSylwester Nawrocki <s.nawrocki@samsung.com>
      Tested-by: default avatarAlban Browaeys <prahal@yahoo.com>
      Reviewed-by: default avatarTomeu Vizoso <tomeu.vizoso@collabora.com>
      Signed-off-by: default avatarStephen Boyd <sboyd@codeaurora.org>
      Signed-off-by: default avatarMichael Turquette <mturquette@linaro.org>
      73e0e496
  2. 04 Feb, 2015 1 commit
  3. 03 Feb, 2015 2 commits
    • Stefan Wahren's avatar
      clk: mxs: Fix invalid 32-bit access to frac registers · 039e5970
      Stefan Wahren authored
      According to i.MX23 and i.MX28 reference manual [1],[2] the fractional
      clock control register is 32-bit wide, but is separated in 4 parts.
      So write instructions must not apply to more than 1 part at once.
      
      The clk init for the i.MX28 violates this restriction and all the other
      accesses on that register suggest that there isn't such a restriction.
      
      This patch restricts the access to this register to byte instructions and
      extends the comment in the init functions.
      
      Btw the imx23 init now uses a R-M-W sequence just like imx28 init
      to avoid any clock glitches.
      
      The changes has been tested with a i.MX23 and a i.MX28 board.
      
      [1] - http://cache.freescale.com/files/dsp/doc/ref_manual/IMX23RM.pdf
      [2] - http://cache.freescale.com/files/dsp/doc/ref_manual/MCIMX28RM.pdfSigned-off-by: default avatarStefan Wahren <stefan.wahren@i2se.com>
      Reviewed-by: default avatarMarek Vasut <marex@denx.de>
      Reviewed-by: default avatarFabio Estevam <fabio.estevam@freescale.com>
      Signed-off-by: default avatarMichael Turquette <mturquette@linaro.org>
      039e5970
    • Arnd Bergmann's avatar
      clk: omap: compile legacy omap3 clocks conditionally · 6793a30a
      Arnd Bergmann authored
      The 'ARM: OMAP3: legacy clock data move under clk driver' patch series
      causes build errors when CONFIG_OMAP3 is not set:
      
      drivers/clk/ti/dpll.c: In function 'ti_clk_register_dpll':
      drivers/clk/ti/dpll.c:199:31: error: 'omap3_dpll_ck_ops' undeclared (first use in this function)
        const struct clk_ops *ops = &omap3_dpll_ck_ops;
                                     ^
      drivers/clk/ti/dpll.c:199:31: note: each undeclared identifier is reported only once for each function it appears in
      drivers/clk/ti/dpll.c:259:10: error: 'omap3_dpll_per_ck_ops' undeclared (first use in this function)
         ops = &omap3_dpll_per_ck_ops;
                ^
      
      drivers/built-in.o: In function `ti_clk_register_gate':
      drivers/clk/ti/gate.c:179: undefined reference to `clkhwops_omap3430es2_dss_usbhost_wait'
      drivers/clk/ti/gate.c:179: undefined reference to `clkhwops_am35xx_ipss_module_wait'
      -in.o: In function `ti_clk_register_interface':
      drivers/clk/ti/interface.c:100: undefined reference to `clkhwops_omap3430es2_iclk_hsotgusb_wait'
      drivers/clk/ti/interface.c:100: undefined reference to `clkhwops_omap3430es2_iclk_dss_usbhost_wait'
      drivers/clk/ti/interface.c:100: undefined reference to `clkhwops_omap3430es2_iclk_ssi_wait'
      drivers/clk/ti/interface.c:100: undefined reference to `clkhwops_am35xx_ipss_wait'
      drivers/built-in.o: In function `ti_clk_register_composite':
      :(.text+0x3da768): undefined reference to `ti_clk_build_component_gate'
      
      In order to fix that problem, this patch makes the omap3 legacy code
      compiled only when both CONFIG_OMAP3 and CONFIG_ATAGS are set.
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Acked-by: default avatarTony Lindgren <tony@atomide.com>
      Signed-off-by: default avatarMichael Turquette <mturquette@linaro.org>
      6793a30a
  4. 02 Feb, 2015 19 commits
  5. 01 Feb, 2015 5 commits
    • Linus Torvalds's avatar
      Merge tag 'armsoc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc · fba7e994
      Linus Torvalds authored
      Pull ARM SoC fixes from Olof Johansson:
       "One more week's worth of fixes.  Worth pointing out here are:
      
         - A patch fixing detaching of iommu registrations when a device is
           removed -- earlier the ops pointer wasn't managed properly
         - Another set of Renesas boards get the same GIC setup fixup as
           others have in previous -rcs
         - Serial port aliases fixups for sunxi.  We did the same to tegra but
           we caught that in time before the merge window due to more machines
           being affected.  Here it took longer for anyone to notice.
         - A couple more DT tweaks on sunxi
         - A follow-up patch for the mvebu coherency disabling in last -rc
           batch"
      
      * tag 'armsoc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
        arm: dma-mapping: Set DMA IOMMU ops in arm_iommu_attach_device()
        ARM: shmobile: r8a7790: Instantiate GIC from C board code in legacy builds
        ARM: shmobile: r8a73a4: Instantiate GIC from C board code in legacy builds
        ARM: mvebu: don't set the PL310 in I/O coherency mode when I/O coherency is disabled
        ARM: sunxi: dt: Fix aliases
        ARM: dts: sun4i: Add simplefb node with de_fe0-de_be0-lcd0-hdmi pipeline
        ARM: dts: sun6i: ippo-q8h-v5: Fix serial0 alias
        ARM: dts: sunxi: Fix usb-phy support for sun4i/sun5i
      fba7e994
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input · 3441456b
      Linus Torvalds authored
      Pull input layer updates from Dmitry Torokhov:
       "Just a few quirks for PS/2 this time"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
        Input: elantech - add more Fujtisu notebooks to force crc_enabled
        Input: i8042 - add noloop quirk for Medion Akoya E7225 (MD98857)
        Input: synaptics - adjust min/max for Lenovo ThinkPad X1 Carbon 2nd
      3441456b
    • Linus Torvalds's avatar
      sched: don't cause task state changes in nested sleep debugging · 00845eb9
      Linus Torvalds authored
      Commit 8eb23b9f ("sched: Debug nested sleeps") added code to report
      on nested sleep conditions, which we generally want to avoid because the
      inner sleeping operation can re-set the thread state to TASK_RUNNING,
      but that will then cause the outer sleep loop not actually sleep when it
      calls schedule.
      
      However, that's actually valid traditional behavior, with the inner
      sleep being some fairly rare case (like taking a sleeping lock that
      normally doesn't actually need to sleep).
      
      And the debug code would actually change the state of the task to
      TASK_RUNNING internally, which makes that kind of traditional and
      working code not work at all, because now the nested sleep doesn't just
      sometimes cause the outer one to not block, but will cause it to happen
      every time.
      
      In particular, it will cause the cardbus kernel daemon (pccardd) to
      basically busy-loop doing scheduling, converting a laptop into a heater,
      as reported by Bruno Prémont.  But there may be other legacy uses of
      that nested sleep model in other drivers that are also likely to never
      get converted to the new model.
      
      This fixes both cases:
      
       - don't set TASK_RUNNING when the nested condition happens (note: even
         if WARN_ONCE() only _warns_ once, the return value isn't whether the
         warning happened, but whether the condition for the warning was true.
         So despite the warning only happening once, the "if (WARN_ON(..))"
         would trigger for every nested sleep.
      
       - in the cases where we knowingly disable the warning by using
         "sched_annotate_sleep()", don't change the task state (that is used
         for all core scheduling decisions), instead use '->task_state_change'
         that is used for the debugging decision itself.
      
      (Credit for the second part of the fix goes to Oleg Nesterov: "Can't we
      avoid this subtle change in behaviour DEBUG_ATOMIC_SLEEP adds?" with the
      suggested change to use 'task_state_change' as part of the test)
      Reported-and-bisected-by: default avatarBruno Prémont <bonbons@linux-vserver.org>
      Tested-by: default avatarRafael J Wysocki <rjw@rjwysocki.net>
      Acked-by: default avatarOleg Nesterov <oleg@redhat.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>,
      Cc: Ilya Dryomov <ilya.dryomov@inktank.com>,
      Cc: Mike Galbraith <umgwanakikbuti@gmail.com>
      Cc: Ingo Molnar <mingo@kernel.org>
      Cc: Peter Hurley <peter@hurleysoftware.com>,
      Cc: Davidlohr Bueso <dave@stgolabs.net>,
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      00845eb9
    • Rainer Koenig's avatar
      Input: elantech - add more Fujtisu notebooks to force crc_enabled · 47c1ffb2
      Rainer Koenig authored
      Add two more Fujitsu LIFEBOOK models that also ship with the Elantech
      touchpad and don't work with crc_disabled to the quirk list.
      Signed-off-by: default avatarRainer Koenig <Rainer.Koenig@ts.fujitsu.com>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
      47c1ffb2
    • Olof Johansson's avatar
      Merge tag 'renesas-soc-fixes3-for-v3.19' of... · 28111dda
      Olof Johansson authored
      Merge tag 'renesas-soc-fixes3-for-v3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into fixes
      
      Merge "Third Round of Renesas ARM Based SoC Fixes for v3.19" from Simon Horman:
      
      * Instantiate GIC from C board code in legacy builds on r8a7790 and r8a73a4
      
      * tag 'renesas-soc-fixes3-for-v3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
        ARM: shmobile: r8a7790: Instantiate GIC from C board code in legacy builds
        ARM: shmobile: r8a73a4: Instantiate GIC from C board code in legacy builds
      Signed-off-by: default avatarOlof Johansson <olof@lixom.net>
      28111dda
  6. 31 Jan, 2015 4 commits
  7. 30 Jan, 2015 8 commits