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drm/ttm: fix documentation of ttm_bo_reserve 

Previously, the comment was inconsistent. EDEADLK is what the ww_mutex
mechanism really returns.

Signed-off-by: Nicolai Hähnle <Nicolai.Haehnle@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Nicolai Hähnle 2015-12-12 11:42:23 -05:00 committed by Dave Airlie
parent 21de54b3c4
commit eb227c554e
1 changed files with 2 additions and 2 deletions
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4
include/drm/ttm/ttm_bo_driver.h
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@ -826,10 +826,10 @@ static inline int __ttm_bo_reserve(struct ttm_buffer_object *bo,
* reserved, the validation sequence is checked against the validation
* sequence of the process currently reserving the buffer,
* and if the current validation sequence is greater than that of the process
* holding the reservation, the function returns -EAGAIN. Otherwise it sleeps
* holding the reservation, the function returns -EDEADLK. Otherwise it sleeps
* waiting for the buffer to become unreserved, after which it retries
* reserving.
* The caller should, when receiving an -EAGAIN error
* The caller should, when receiving an -EDEADLK error
* release all its buffer reservations, wait for @bo to become unreserved, and
* then rerun the validation with the same validation sequence. This procedure
* will always guarantee that the process with the lowest validation sequence