[media] videobuf2-core: take mmap_sem before calling __qbuf_userptr
(Changes since v2: dropped local variable as suggested by Laurent) Commit f035eb4e (videobuf2: fix lockdep warning) unfortunately removed the mmap_sem lock that is needed around the call to __qbuf_userptr. Amazingly nobody noticed this (especially me as the author) until Jan Kara pointed this out to me. Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com> Reported-by: NJan Kara <jack@suse.cz> Acked-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>
Showing
想要评论请 注册 或 登录