From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kulikov Vasiliy Date: Tue, 27 Jul 2010 18:42:40 +0000 Subject: [PATCH] dvb: siano: free spinlock before schedule() Message-Id: <1280256161-7971-1-git-send-email-segooon@gmail.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: kernel-janitors@vger.kernel.org Cc: Mauro Carvalho Chehab , Douglas Schilling Landgraf , Jiri Kosina , Roel Kluin , Andrew Morton , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org Calling schedule() holding spinlock with disables irqs is improper. As spinlock protects list coredev->buffers, it can be unlocked untill wakeup. This bug was introduced in a9349315f65cd6a16e8fab1f6cf0fd40f379c4db. Signed-off-by: Kulikov Vasiliy --- drivers/media/dvb/siano/smscoreapi.c | 6 ++++-- 1 files changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/media/dvb/siano/smscoreapi.c b/drivers/media/dvb/siano/smscoreapi.c index 7f2c94a..d93468c 100644 --- a/drivers/media/dvb/siano/smscoreapi.c +++ b/drivers/media/dvb/siano/smscoreapi.c @@ -1113,9 +1113,11 @@ struct smscore_buffer_t *smscore_getbuffer(struct smscore_device_t *coredev) */ prepare_to_wait(&coredev->buffer_mng_waitq, &wait, TASK_INTERRUPTIBLE); - - if (list_empty(&coredev->buffers)) + if (list_empty(&coredev->buffers)) { + spin_unlock_irqrestore(&coredev->bufferslock, flags); schedule(); + spin_lock_irqsave(&coredev->bufferslock, flags); + } finish_wait(&coredev->buffer_mng_waitq, &wait); -- 1.7.0.4