tree 464385f87b69a5536904db5d096362d0d30e5aca
parent e959ed9a44c5239863ca6db42cb37130bee3c7a3
author Christoph Hellwig <hch@lst.de> 1440677821 +0200
committer James Bottomley <JBottomley@Odin.com> 1440792898 -0700

scsi_dh: don't allow to detach device handlers at runtime

The I/O submission and completion paths call into the device handler
without any synchronization agains detachment.  So disallow detaching
device handlers at runtime.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <JBottomley@Odin.com>