1. 07 Dec, 2011 3 commits
  2. 06 Dec, 2011 5 commits
  3. 05 Dec, 2011 28 commits
  4. 04 Dec, 2011 1 commit
    • Linus Torvalds's avatar
      x86: Fix boot failures on older AMD CPU's · 8e8da023
      Linus Torvalds authored
      People with old AMD chips are getting hung boots, because commit
      bcb80e53 ("x86, microcode, AMD: Add microcode revision to
      /proc/cpuinfo") moved the microcode detection too early into
      "early_init_amd()".
      
      At that point we are *so* early in the booth that the exception tables
      haven't even been set up yet, so the whole
      
      	rdmsr_safe(MSR_AMD64_PATCH_LEVEL, &c->microcode, &dummy);
      
      doesn't actually work: if the rdmsr does a GP fault (due to non-existant
      MSR register on older CPU's), we can't fix it up yet, and the boot fails.
      
      Fix it by simply moving the code to a slightly later point in the boot
      (init_amd() instead of early_init_amd()), since the kernel itself
      doesn't even really care about the microcode patchlevel at this point
      (or really ever: it's made available to user space in /proc/cpuinfo, and
      updated if you do a microcode load).
      Reported-tested-and-bisected-by: default avatarLarry Finger <Larry.Finger@lwfinger.net>
      Tested-by: default avatarBob Tracy <rct@gherkin.frus.com>
      Acked-by: default avatarBorislav Petkov <borislav.petkov@amd.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      8e8da023
  5. 03 Dec, 2011 1 commit
    • Konrad Rzeszutek Wilk's avatar
      xen/pm_idle: Make pm_idle be default_idle under Xen. · e5fd47bf
      Konrad Rzeszutek Wilk authored
      The idea behind commit d91ee586 ("cpuidle: replace xen access to x86
      pm_idle and default_idle") was to have one call - disable_cpuidle()
      which would make pm_idle not be molested by other code.  It disallows
      cpuidle_idle_call to be set to pm_idle (which is excellent).
      
      But in the select_idle_routine() and idle_setup(), the pm_idle can still
      be set to either: amd_e400_idle, mwait_idle or default_idle.  This
      depends on some CPU flags (MWAIT) and in AMD case on the type of CPU.
      
      In case of mwait_idle we can hit some instances where the hypervisor
      (Amazon EC2 specifically) sets the MWAIT and we get:
      
        Brought up 2 CPUs
        invalid opcode: 0000 [#1] SMP
      
        Pid: 0, comm: swapper Not tainted 3.1.0-0.rc6.git0.3.fc16.x86_64 #1
        RIP: e030:[<ffffffff81015d1d>]  [<ffffffff81015d1d>] mwait_idle+0x6f/0xb4
        ...
        Call Trace:
         [<ffffffff8100e2ed>] cpu_idle+0xae/0xe8
         [<ffffffff8149ee78>] cpu_bringup_and_idle+0xe/0x10
        RIP  [<ffffffff81015d1d>] mwait_idle+0x6f/0xb4
         RSP <ffff8801d28ddf10>
      
      In the case of amd_e400_idle we don't get so spectacular crashes, but we
      do end up making an MSR which is trapped in the hypervisor, and then
      follow it up with a yield hypercall.  Meaning we end up going to
      hypervisor twice instead of just once.
      
      The previous behavior before v3.0 was that pm_idle was set to
      default_idle regardless of select_idle_routine/idle_setup.
      
      We want to do that, but only for one specific case: Xen.  This patch
      does that.
      
      Fixes RH BZ #739499 and Ubuntu #881076
      Reported-by: default avatarStefan Bader <stefan.bader@canonical.com>
      Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      e5fd47bf
  6. 02 Dec, 2011 2 commits
    • Linus Torvalds's avatar
      Merge branch 'usb-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb · af968e29
      Linus Torvalds authored
      * 'usb-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (21 commits)
        usb: ftdi_sio: add PID for Propox ISPcable III
        Revert "xHCI: reset-on-resume quirk for NEC uPD720200"
        xHCI: fix bug in xhci_clear_command_ring()
        usb: gadget: fsl_udc: fix dequeuing a request in progress
        usb: fsl_mxc_udc.c: Remove compile-time dependency of MX35 SoC type
        usb: fsl_mxc_udc.c: Fix build issue by including missing header file
        USB: fsl_udc_core: use usb_endpoint_xfer_isoc to judge ISO XFER
        usb: udc: Fix gadget driver's speed check in various UDC drivers
        usb: gadget: fix g_serial regression
        usb: renesas_usbhs: fixup driver speed
        usb: renesas_usbhs: fixup gadget.dev.driver when udc_stop.
        usb: renesas_usbhs: fixup signal the driver that cable was disconnected
        usb: renesas_usbhs: fixup device_register timing
        usb: musb: PM: fix context save/restore in suspend/resume path
        USB: linux-cdc-acm.inf: add support for the acm_ms gadget
        EHCI : Fix a regression in the ISO scheduler
        xHCI: reset-on-resume quirk for NEC uPD720200
        USB: whci-hcd: fix endian conversion in qset_clear()
        USB: usb-storage: unusual_devs entry for Kingston DT 101 G2
        usb: option: add SIMCom SIM5218
        ...
      af968e29
    • Linus Torvalds's avatar
      Merge branch 'staging-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging · f9143eae
      Linus Torvalds authored
      * 'staging-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
        Staging: comedi: fix integer overflow in do_insnlist_ioctl()
        Revert "Staging: comedi: integer overflow in do_insnlist_ioctl()"
        Staging: comedi: integer overflow in do_insnlist_ioctl()
        Staging: comedi: fix signal handling in read and write
        Staging: comedi: fix mmap_count
        staging: comedi: fix oops for USB DAQ devices.
        staging: comedi: usbduxsigma: Fixed wrong range for the analogue channel.
        staging:rts_pstor:Complete scanning_done variable
        staging: usbip: bugfix for deadlock
      f9143eae