From 34a78a4e1da1559415ec6894403439a85dbda29c Mon Sep 17 00:00:00 2001 From: Mike Isely Date: Sat, 9 Feb 2008 23:01:07 -0600 Subject: pvrusb2: Eliminate timer race during tear-down From: Mike Isely The pvrusb2 tear-down logic was clearing two timers before stopping its internal work queue. That left a tiny window open where the work queue might run after the timers are stopped, possibly starting them again. This could lead to dangling pointers and an oops. Solution: Kill the work queue first, then delete the timers. Signed-off-by: Mike Isely --- linux/drivers/media/video/pvrusb2/pvrusb2-hdw.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'linux/drivers') diff --git a/linux/drivers/media/video/pvrusb2/pvrusb2-hdw.c b/linux/drivers/media/video/pvrusb2/pvrusb2-hdw.c index b3120a1fc..85862f9e3 100644 --- a/linux/drivers/media/video/pvrusb2/pvrusb2-hdw.c +++ b/linux/drivers/media/video/pvrusb2/pvrusb2-hdw.c @@ -2134,13 +2134,13 @@ void pvr2_hdw_destroy(struct pvr2_hdw *hdw) { if (!hdw) return; pvr2_trace(PVR2_TRACE_INIT,"pvr2_hdw_destroy: hdw=%p",hdw); - del_timer_sync(&hdw->quiescent_timer); - del_timer_sync(&hdw->encoder_wait_timer); if (hdw->workqueue) { flush_workqueue(hdw->workqueue); destroy_workqueue(hdw->workqueue); hdw->workqueue = NULL; } + del_timer_sync(&hdw->quiescent_timer); + del_timer_sync(&hdw->encoder_wait_timer); if (hdw->fw_buffer) { kfree(hdw->fw_buffer); hdw->fw_buffer = NULL; -- cgit v1.2.3