1. 30 Mar, 2016 8 commits
  2. 29 Mar, 2016 3 commits
  3. 21 Mar, 2016 2 commits
  4. 20 Mar, 2016 1 commit
  5. 19 Mar, 2016 1 commit
    • Chris Wilson's avatar
      dma-buf, drm, ion: Propagate error code from dma_buf_start_cpu_access() · 18b862dc
      Chris Wilson authored
      Drivers, especially i915.ko, can fail during the initial migration of a
      dma-buf for CPU access. However, the error code from the driver was not
      being propagated back to ioctl and so userspace was blissfully ignorant
      of the failure. Rendering corruption ensues.
      
      Whilst fixing the ioctl to return the error code from
      dma_buf_start_cpu_access(), also do the same for
      dma_buf_end_cpu_access().  For most drivers, dma_buf_end_cpu_access()
      cannot fail. i915.ko however, as most drivers would, wants to avoid being
      uninterruptible (as would be required to guarrantee no failure when
      flushing the buffer to the device). As userspace already has to handle
      errors from the SYNC_IOCTL, take advantage of this to be able to restart
      the syscall across signals.
      
      This fixes a coherency issue for i915.ko as well as reducing the
      uninterruptible hold upon its BKL, the struct_mutex.
      
      Fixes commit c11e391d
      Author: Daniel Vetter <daniel.vetter@ffwll.ch>
      Date:   Thu Feb 11 20:04:51 2016 -0200
      
          dma-buf: Add ioctls to allow userspace to flush
      
      Testcase: igt/gem_concurrent_blit/*dmabuf*interruptible
      Testcase: igt/prime_mmap_coherency/ioctl-errors
      Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
      Cc: Tiago Vignatti <tiago.vignatti@intel.com>
      Cc: Stéphane Marchesin <marcheu@chromium.org>
      Cc: David Herrmann <dh.herrmann@gmail.com>
      Cc: Sumit Semwal <sumit.semwal@linaro.org>
      Cc: Daniel Vetter <daniel.vetter@intel.com>
      CC: linux-media@vger.kernel.org
      Cc: dri-devel@lists.freedesktop.org
      Cc: linaro-mm-sig@lists.linaro.org
      Cc: intel-gfx@lists.freedesktop.org
      Cc: devel@driverdev.osuosl.org
      Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
      Link: http://patchwork.freedesktop.org/patch/msgid/1458331359-2634-1-git-send-email-chris@chris-wilson.co.uk
      18b862dc
  6. 15 Mar, 2016 2 commits
  7. 13 Mar, 2016 2 commits
  8. 10 Mar, 2016 1 commit
  9. 08 Mar, 2016 6 commits
  10. 04 Mar, 2016 14 commits