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Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_cursor.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_cursor.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_cursor.c b/drivers/gpu/drm/radeon/radeon_cursor.c index 0d67674b64b..b097d5b4ff3 100644 --- a/drivers/gpu/drm/radeon/radeon_cursor.c +++ b/drivers/gpu/drm/radeon/radeon_cursor.c @@ -246,8 +246,14 @@ int radeon_crtc_cursor_move(struct drm_crtc *crtc, int i = 0; struct drm_crtc *crtc_p; - /* avivo cursor image can't end on 128 pixel boundary or + /* + * avivo cursor image can't end on 128 pixel boundary or * go past the end of the frame if both crtcs are enabled + * + * NOTE: It is safe to access crtc->enabled of other crtcs + * without holding either the mode_config lock or the other + * crtc's lock as long as write access to this flag _always_ + * grabs all locks. */ list_for_each_entry(crtc_p, &crtc->dev->mode_config.crtc_list, head) { if (crtc_p->enabled) |