• Bart Van Assche's avatar
    scsi: Protect SCSI device state changes with a mutex · 0db6ca8a
    Bart Van Assche authored
    Serializing SCSI device state changes avoids that two state changes can
    occur concurrently, e.g. the state changes in scsi_target_block() and
    __scsi_remove_device(). This serialization is essential to make patch
    "Make __scsi_remove_device go straight from BLOCKED to DEL" work
    reliably.
    
    Enable this mechanism for all scsi_target_*block() callers but not for
    the scsi_internal_device_unblock() calls from the mpt3sas driver because
    that driver can call scsi_internal_device_unblock() from atomic context.
    Signed-off-by: default avatarBart Van Assche <bart.vanassche@sandisk.com>
    Cc: Christoph Hellwig <hch@lst.de>
    Cc: Hannes Reinecke <hare@suse.com>
    Cc: Johannes Thumshirn <jthumshirn@suse.de>
    Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
    0db6ca8a
sd.c 96.4 KB