lkml.org 
[lkml]   [2013]   [Jan]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[ 087/221] drm/i915; Only increment the user-pin-count after successfully pinning the bo
    Date
    3.7-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Chris Wilson <chris@chris-wilson.co.uk>

    commit 93be8788e648817d62fda33e2998eb6ca6ebf3a3 upstream.

    As along the error path we do not correct the user pin-count for the
    failure, we may end up with userspace believing that it has a pinned
    object at offset 0 (when interrupted by a signal for example).

    Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
    Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/gpu/drm/i915/i915_gem.c | 7 ++++---
    1 file changed, 4 insertions(+), 3 deletions(-)

    --- a/drivers/gpu/drm/i915/i915_gem.c
    +++ b/drivers/gpu/drm/i915/i915_gem.c
    @@ -3511,14 +3511,15 @@ i915_gem_pin_ioctl(struct drm_device *de
    goto out;
    }

    - obj->user_pin_count++;
    - obj->pin_filp = file;
    - if (obj->user_pin_count == 1) {
    + if (obj->user_pin_count == 0) {
    ret = i915_gem_object_pin(obj, args->alignment, true, false);
    if (ret)
    goto out;
    }

    + obj->user_pin_count++;
    + obj->pin_filp = file;
    +
    /* XXX - flush the CPU caches for pinned objects
    * as the X server doesn't manage domains yet
    */



    \
     
     \ /
      Last update: 2013-01-16 03:21    [W:4.092 / U:0.004 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site