From 032d8d90ba23e1770604bbb1102ec77f5aa8ae44 Mon Sep 17 00:00:00 2001 From: Akinobu Mita Date: Wed, 26 Mar 2008 12:09:01 +0100 Subject: cdrom: protect cdrom_device_info list by mutex This patch protects the list of cdrom_device_info by cdrom_mutex when the file in /proc/sys/dev/cdrom/ is written. Signed-off-by: Akinobu Mita Signed-off-by: Jens Axboe --- drivers/cdrom/cdrom.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/cdrom') diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c index fbcf4b3f8d0e..326ef1b4a4ea 100644 --- a/drivers/cdrom/cdrom.c +++ b/drivers/cdrom/cdrom.c @@ -3427,6 +3427,7 @@ static void cdrom_update_settings(void) { struct cdrom_device_info *cdi; + mutex_lock(&cdrom_mutex); for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) { if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY)) cdi->options |= CDO_AUTO_CLOSE; @@ -3445,6 +3446,7 @@ static void cdrom_update_settings(void) else cdi->options &= ~CDO_CHECK_TYPE; } + mutex_unlock(&cdrom_mutex); } static int cdrom_sysctl_handler(ctl_table *ctl, int write, struct file * filp, -- cgit v1.2.2