dm-mpath, scsi_dh: don't let dm detach device handlers

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While allowing dm-mpath to attach device handlers is a functionality we need
for backwards compatibility reason there is no reason to reference count
them and detach them if dm-mpath stops using the device for some reason.

If the device handler works for the given device it can just stay attached,
and we can take the retain_hw_handler codepath.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Mike Snitzer <snitzer@redhat.com>
Acked-by: Hannes Reinecke <hare@Suse.de>
Signed-off-by: James Bottomley <JBottomley@Odin.com>

...

This commit is contained in:

Christoph Hellwig 2015-08-27 14:16:54 +02:00 • committed by James Bottomley

parent 36dd5acd19

commit 1bab0de027

4 changed files with 28 additions and 95 deletions

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21

drivers/md/dm-mpath.c

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98

drivers/scsi/device_handler/scsi_dh.c

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1

include/scsi/scsi_device.h

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5

include/scsi/scsi_dh.h

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