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drm: Set crc->opened to false before setting crc source to NULL.

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to terminate the while-loop in drm_dp_aux_crc_work when
drm_dp_start/stop_crc are called in the hook to set crc source.

v3: set crc->opened to false without checking (Nick)
v2: Move spin_lock around entire crc->opened use (Daniel)

Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Harry Wentland <Harry.Wentland@amd.com>
Cc: Nick Kazlauskas <Nicholas.Kazlauskas@amd.com>
Signed-off-by: Dingchen Zhang <dingchen.zhang@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190726173743.11641-1-dingchen.zhang@amd.com
This commit is contained in:
Dingchen Zhang 2019-07-26 13:37:43 -04:00 committed by Alex Deucher
parent 72a848f5c4
commit 292f3e496b
1 changed files with 5 additions and 0 deletions
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5
drivers/gpu/drm/drm_debugfs_crc.c
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@ -258,6 +258,11 @@ static int crtc_crc_release(struct inode *inode, struct file *filep)
struct drm_crtc *crtc = filep->f_inode->i_private;
struct drm_crtc_crc *crc = &crtc->crc;
/* terminate the infinite while loop if 'drm_dp_aux_crc_work' running */
spin_lock_irq(&crc->lock);
crc->opened = false;
spin_unlock_irq(&crc->lock);
crtc->funcs->set_crc_source(crtc, NULL);
spin_lock_irq(&crc->lock);