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Commit eb227c55 authored by Nicolai Hähnle's avatar Nicolai Hähnle Committed by Dave Airlie
Browse files

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: default avatarNicolai Hähnle <Nicolai.Haehnle@amd.com>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent 21de54b3

include/drm/ttm/ttm_bo_driver.h

+2 −2
Original line number Diff line number Diff line
@@ -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