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cdrom: protect cdrom_device_info list by mutex

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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 <akinobu.mita@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Akinobu Mita
2008-03-26 12:09:01 +01:00
committed by Jens Axboe
parent 3c3f4e012a
commit 032d8d90ba
1 changed files with 2 additions and 0 deletions
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2
drivers/cdrom/cdrom.c
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@@ -3427,6 +3427,7 @@ static void cdrom_update_settings(void)
{ {
struct cdrom_device_info *cdi; struct cdrom_device_info *cdi;
mutex_lock(&cdrom_mutex);
for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) { for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) {
if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY)) if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
cdi->options |= CDO_AUTO_CLOSE; cdi->options |= CDO_AUTO_CLOSE;
@@ -3445,6 +3446,7 @@ static void cdrom_update_settings(void)
else else
cdi->options &= ~CDO_CHECK_TYPE; cdi->options &= ~CDO_CHECK_TYPE;
} }
mutex_unlock(&cdrom_mutex);
} }
static int cdrom_sysctl_handler(ctl_table *ctl, int write, struct file * filp, static int cdrom_sysctl_handler(ctl_table *ctl, int write, struct file * filp,