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drm: Clean up pending events in the core

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There's really no reason to not do so, instead of replicating this
for every use-case and every driver. Now we can't just nuke the events,
since that would still mean that all drm_event users would need to know
when that has happened, since calling e.g. drm_send_event isn't allowed
any more. Instead just unlink them from the file, and detect this case
and handle it appropriately in all functions.

v2: Adjust existing kerneldoc too.

v3: Improve wording of the kerneldoc and split out vblank cleanup (Laurent).

Cc: Alex Deucher <[email protected]>
Cc: Laurent Pinchart <[email protected]>
Acked-by: Daniel Stone <[email protected]>
Reviewed-by: Alex Deucher <[email protected]> (v1)
Reviewed-by: Laurent Pinchart <[email protected]>
Signed-off-by: Daniel Vetter <[email protected]>
Link: http://patchwork.freedesktop.org/patch/msgid/[email protected]
This commit is contained in:
Daniel Vetter 2016-01-25 22:16:43 +01:00
commit 681047b486
2 changed files with 31 additions and 1 deletions
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2
include/drm/drmP.h
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@ -283,6 +283,7 @@ struct drm_ioctl_desc {
struct drm_pending_event {
struct drm_event *event;
struct list_head link;
struct list_head pending_link;
struct drm_file *file_priv;
pid_t pid; /* pid of requester, no guarantee it's valid by the time
we deliver the event, for tracing only */
@ -346,6 +347,7 @@ struct drm_file {
struct list_head blobs;
wait_queue_head_t event_wait;
struct list_head pending_event_list;
struct list_head event_list;
int event_space;