1. 01 Aug, 2014 4 commits
  2. 25 Jul, 2014 1 commit
  3. 24 Jul, 2014 2 commits
  4. 23 Jul, 2014 5 commits
    • Minchan Kim's avatar
      zram: avoid lockdep splat by revalidate_disk · b4c5c609
      Minchan Kim authored
      Sasha reported lockdep warning [1] introduced by [2].
      
      It could be fixed by doing disk revalidation out of the init_lock.  It's
      okay because disk capacity change is protected by init_lock so that
      revalidate_disk always sees up-to-date value so there is no race.
      
      [1] https://lkml.org/lkml/2014/7/3/735
      [2] zram: revalidate disk after capacity change
      
      Fixes 2e32baea
      
       ("zram: revalidate disk after capacity change").
      Signed-off-by: default avatarMinchan Kim <minchan@kernel.org>
      Reported-by: default avatarSasha Levin <sasha.levin@oracle.com>
      Cc: "Alexander E. Patrakov" <patrakov@gmail.com>
      Cc: Nitin Gupta <ngupta@vflare.org>
      Cc: Jerome Marchand <jmarchan@redhat.com>
      Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
      CC: <stable@vger.kernel.org>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      b4c5c609
    • Stefan Richter's avatar
      firewire: ohci: disable MSI for VIA VT6315 again · d584a662
      Stefan Richter authored
      Revert half of commit d151f985:  If isochronous I/O is attempted with
      packets larget than 1 kByte, VIA VT6315 rev 01 immediately stops to generate
      any interrupts if MSI are used.  Fix this by going back to legacy interrupts.
      [Thread "Isochronous streaming with VT6315 OHCI",
      http://marc.info/?t=139049641500003
      
      ]
      
      With smaller packets, the loss of IRQs happens too but only very rarely ---
      rarely eneough that it was not yet possible for me to determine whether
      QUIRK_NO_MSI is an actual fix for this rare variation of this chip bug.
      
      I am keeping QUIRK_CYCLE_TIMER off of VT6315 rev >= 1 because this has been
      verified by myself with certainty.  On the other hand, I am also keeping
      QUIRK_CYCLE_TIMER on for VT6315 rev 0 because I don't know at this time
      whether this revision accesses Cycle Timer non-atomically like most of the
      other VIA OHCIs are known to do.
      Reported-by: default avatarRémy Bruno <remy-fw@remy.trinnov.com>
      Signed-off-by: default avatarStefan Richter <stefanr@s5r6.in-berlin.de>
      d584a662
    • Christian König's avatar
      drm/radeon: fix irq ring buffer overflow handling · e8c214d2
      Christian König authored
      
      
      We must mask out the overflow bit as well, otherwise
      the wptr will never match the rptr again and the interrupt
      handler will loop forever.
      Signed-off-by: default avatarChristian König <christian.koenig@amd.com>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
      Reviewed-by: default avatarMichel Dänzer <michel.daenzer@amd.com>
      e8c214d2
    • Tejun Heo's avatar
      libata: introduce ata_host->n_tags to avoid oops on SAS controllers · 1a112d10
      Tejun Heo authored
      1871ee13
      
       ("libata: support the ata host which implements a queue
      depth less than 32") directly used ata_port->scsi_host->can_queue from
      ata_qc_new() to determine the number of tags supported by the host;
      unfortunately, SAS controllers doing SATA don't initialize ->scsi_host
      leading to the following oops.
      
       BUG: unable to handle kernel NULL pointer dereference at 0000000000000058
       IP: [<ffffffff814e0618>] ata_qc_new_init+0x188/0x1b0
       PGD 0
       Oops: 0002 [#1] SMP
       Modules linked in: isci libsas scsi_transport_sas mgag200 drm_kms_helper ttm
       CPU: 1 PID: 518 Comm: udevd Not tainted 3.16.0-rc6+ #62
       Hardware name: Intel Corporation S2600CO/S2600CO, BIOS SE5C600.86B.02.02.0002.122320131210 12/23/2013
       task: ffff880c1a00b280 ti: ffff88061a000000 task.ti: ffff88061a000000
       RIP: 0010:[<ffffffff814e0618>]  [<ffffffff814e0618>] ata_qc_new_init+0x188/0x1b0
       RSP: 0018:ffff88061a003ae8  EFLAGS: 00010012
       RAX: 0000000000000001 RBX: ffff88000241ca80 RCX: 00000000000000fa
       RDX: 0000000000000020 RSI: 0000000000000020 RDI: ffff8806194aa298
       RBP: ffff88061a003ae8 R08: ffff8806194a8000 R09: 0000000000000000
       R10: 0000000000000000 R11: ffff88000241ca80 R12: ffff88061ad58200
       R13: ffff8806194aa298 R14: ffffffff814e67a0 R15: ffff8806194a8000
       FS:  00007f3ad7fe3840(0000) GS:ffff880627620000(0000) knlGS:0000000000000000
       CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
       CR2: 0000000000000058 CR3: 000000061a118000 CR4: 00000000001407e0
       Stack:
        ffff88061a003b20 ffffffff814e96e1 ffff88000241ca80 ffff88061ad58200
        ffff8800b6bf6000 ffff880c1c988000 ffff880619903850 ffff88061a003b68
        ffffffffa0056ce1 ffff88061a003b48 0000000013d6e6f8 ffff88000241ca80
       Call Trace:
        [<ffffffff814e96e1>] ata_sas_queuecmd+0xa1/0x430
        [<ffffffffa0056ce1>] sas_queuecommand+0x191/0x220 [libsas]
        [<ffffffff8149afee>] scsi_dispatch_cmd+0x10e/0x300
        [<ffffffff814a3bc5>] scsi_request_fn+0x2f5/0x550
        [<ffffffff81317613>] __blk_run_queue+0x33/0x40
        [<ffffffff8131781a>] queue_unplugged+0x2a/0x90
        [<ffffffff8131ceb4>] blk_flush_plug_list+0x1b4/0x210
        [<ffffffff8131d274>] blk_finish_plug+0x14/0x50
        [<ffffffff8117eaa8>] __do_page_cache_readahead+0x198/0x1f0
        [<ffffffff8117ee21>] force_page_cache_readahead+0x31/0x50
        [<ffffffff8117ee7e>] page_cache_sync_readahead+0x3e/0x50
        [<ffffffff81172ac6>] generic_file_read_iter+0x496/0x5a0
        [<ffffffff81219897>] blkdev_read_iter+0x37/0x40
        [<ffffffff811e307e>] new_sync_read+0x7e/0xb0
        [<ffffffff811e3734>] vfs_read+0x94/0x170
        [<ffffffff811e43c6>] SyS_read+0x46/0xb0
        [<ffffffff811e33d1>] ? SyS_lseek+0x91/0xb0
        [<ffffffff8171ee29>] system_call_fastpath+0x16/0x1b
       Code: 00 00 00 88 50 29 83 7f 08 01 19 d2 83 e2 f0 83 ea 50 88 50 34 c6 81 1d 02 00 00 40 c6 81 17 02 00 00 00 5d c3 66 0f 1f 44 00 00 <89> 14 25 58 00 00 00
      
      Fix it by introducing ata_host->n_tags which is initialized to
      ATA_MAX_QUEUE - 1 in ata_host_init() for SAS controllers and set to
      scsi_host_template->can_queue in ata_host_register() for !SAS ones.
      As SAS hosts are never registered, this will give them the same
      ATA_MAX_QUEUE - 1 as before.  Note that we can't use
      scsi_host->can_queue directly for SAS hosts anyway as they can go
      higher than the libata maximum.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Reported-by: default avatarMike Qiu <qiudayu@linux.vnet.ibm.com>
      Reported-by: default avatarJesse Brandeburg <jesse.brandeburg@gmail.com>
      Reported-by: default avatarPeter Hurley <peter@hurleysoftware.com>
      Reported-by: default avatarPeter Zijlstra <peterz@infradead.org>
      Tested-by: default avatarAlexey Kardashevskiy <aik@ozlabs.ru>
      Fixes: 1871ee13 ("libata: support the ata host which implements a queue depth less than 32")
      Cc: Kevin Hao <haokexin@gmail.com>
      Cc: Dan Williams <dan.j.williams@intel.com>
      Cc: stable@vger.kernel.org
      1a112d10
    • Chris Wilson's avatar
      drm/i915: Simplify i915_gem_release_all_mmaps() · eedd10f4
      Chris Wilson authored
      An object can only have an active gtt mapping if it is currently bound
      into the global gtt. Therefore we can simply walk the list of all bound
      objects and check the flag upon those for an active gtt mapping.
      
      From commit 48018a57
      Author: Paulo Zanoni <paulo.r.zanoni@intel.com>
      Date:   Fri Dec 13 15:22:31 2013 -0200
      
          drm/i915: release the GTT mmaps when going into D3
      
      Also note that the WARN is inappropriate for this function as GPU
      activity is orthogonal to GTT mmap status. Rather it is the caller that
      relies upon this condition and so it should assert that the GPU is idle
      itself.
      
      References: https://bugs.freedesktop.org/show_bug.cgi?id=80081
      
      Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
      Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
      Cc: Rodrigo Vivi <rodrigo.vivi@gmail.com>
      Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
      Reviewed-by: default avatarPaulo Zanoni <paulo.r.zanoni@intel.com>
      Tested-by: default avatarPaulo Zanoni <paulo.r.zanoni@intel.com>
      [danvet: cherry-pick from -next to -fixes.]
      Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
      eedd10f4
  5. 22 Jul, 2014 2 commits
  6. 21 Jul, 2014 5 commits
  7. 20 Jul, 2014 5 commits
  8. 18 Jul, 2014 5 commits
  9. 17 Jul, 2014 11 commits