cdrom: protect cdrom_device_info list by mutex (032d8d90) · Commits · 戴 / test

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:

drivers/cdrom/cdrom.c

+2 −0

Original line number	Original line	Diff line number	Diff line
	@@ -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,