From 913f5fc209247b607b1994a710315966f4f9d358 Mon Sep 17 00:00:00 2001 From: Marcin Slusarz Date: Tue, 10 Jun 2008 15:18:16 -0300 Subject: [PATCH] V4L/DVB (8022): saa7134: fix race between opening and closing the device decrementing dev->empress_users should be done as last action of ts_release, because it sleeps and write access to dev->empress_started is not protected in any way (additionally closing thread could mute audio after opening thread unmuted it) Signed-off-by: Marcin Slusarz Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/saa7134/saa7134-empress.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/media/video/saa7134/saa7134-empress.c b/drivers/media/video/saa7134/saa7134-empress.c index 94b2585bdf5..1c8cd0ef4a6 100644 --- a/drivers/media/video/saa7134/saa7134-empress.c +++ b/drivers/media/video/saa7134/saa7134-empress.c @@ -112,7 +112,6 @@ static int ts_release(struct inode *inode, struct file *file) videobuf_stop(&dev->empress_tsq); videobuf_mmap_free(&dev->empress_tsq); - dev->empress_users--; /* stop the encoder */ ts_reset_encoder(dev); @@ -121,6 +120,8 @@ static int ts_release(struct inode *inode, struct file *file) saa_writeb(SAA7134_AUDIO_MUTE_CTRL, saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6)); + dev->empress_users--; + return 0; } -- 2.20.1