scsi: sd: change allow_restart to bool in sysfs interface
/sys/class/scsi_disk/0:2:0:0/allow_restart can be changed to 0 unexpectedly by writing an invalid string such as the following: echo asdf > /sys/class/scsi_disk/0:2:0:0/allow_restart Signed-off-by: Nweiping zhang <zhangweiping@didichuxing.com> Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>
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