forked from Minki/linux
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 <akinobu.mita@gmail.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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@ -3427,6 +3427,7 @@ static void cdrom_update_settings(void)
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{
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{
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struct cdrom_device_info *cdi;
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struct cdrom_device_info *cdi;
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mutex_lock(&cdrom_mutex);
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for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) {
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for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) {
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if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
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if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
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cdi->options |= CDO_AUTO_CLOSE;
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cdi->options |= CDO_AUTO_CLOSE;
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@ -3445,6 +3446,7 @@ static void cdrom_update_settings(void)
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else
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else
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cdi->options &= ~CDO_CHECK_TYPE;
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cdi->options &= ~CDO_CHECK_TYPE;
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}
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}
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mutex_unlock(&cdrom_mutex);
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}
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}
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static int cdrom_sysctl_handler(ctl_table *ctl, int write, struct file * filp,
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static int cdrom_sysctl_handler(ctl_table *ctl, int write, struct file * filp,
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