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17 May 2024, 09:02:56 UTC
Revision ff7c60c580d9722f820d85c9c58ca55ecc1ee7c4 authored by Daniel Vetter on 14 January 2013, 14:08:14 UTC, committed by Dave Airlie on 08 February 2013, 00:44:31 UTC 
drm/ttm: fix fence locking in ttm_buffer_object_transfer, 2nd try
 
This fixes up

commit e8e89622ed361c46bf90ba4828e685a8b603f7e5
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Tue Dec 18 22:25:11 2012 +0100

    drm/ttm: fix fence locking in ttm_buffer_object_transfer

which leaves behind a might_sleep in atomic context, since the
fence_lock spinlock is held over a kmalloc(GFP_KERNEL) call. The fix
is to revert the above commit and only take the lock where we need it,
around the call to ->sync_obj_ref.

v2: Fixup things noticed by Maarten Lankhorst:
- Brown paper bag locking bug.
- No need for kzalloc if we clear the entire thing on the next line.
- check for bo->sync_obj (totally unlikely race, but still someone
  else could have snuck in) and clear fbo->sync_obj if it's cleared
  already.

Reported-by: Dave Airlie <airlied@gmail.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
1 parent 6bacaa9
History
Tip revision: ff7c60c580d9722f820d85c9c58ca55ecc1ee7c4 authored by Daniel Vetter on 14 January 2013, 14:08:14 UTC
drm/ttm: fix fence locking in ttm_buffer_object_transfer, 2nd try
Tip revision: ff7c60c
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