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| author | Christoph Hellwig <hch@lst.de> | 2015-08-27 14:16:54 +0200 |
|---|---|---|
| committer | James Bottomley <JBottomley@Odin.com> | 2015-08-28 13:14:54 -0700 |
| commit | 1bab0de0274fbe8c8ac92179e6705584c55ed169 (patch) | |
| tree | 3a2bbd51706e6ec0a279cbc0011d996de7320aa7 /include/scsi | |
| parent | 36dd5acd196574d41de3e81d8264df475bbb7123 (diff) | |
| download | linux-stable-1bab0de0274fbe8c8ac92179e6705584c55ed169.tar.gz linux-stable-1bab0de0274fbe8c8ac92179e6705584c55ed169.tar.bz2 linux-stable-1bab0de0274fbe8c8ac92179e6705584c55ed169.zip | |
dm-mpath, scsi_dh: don't let dm detach device handlers
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>
Diffstat (limited to 'include/scsi')
| -rw-r--r-- | include/scsi/scsi_device.h | 1 | ||||
| -rw-r--r-- | include/scsi/scsi_dh.h | 5 |
2 files changed, 0 insertions, 6 deletions
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index 50c2a363bc8f..798d67994aeb 100644 --- a/include/scsi/scsi_device.h +++ b/include/scsi/scsi_device.h @@ -221,7 +221,6 @@ struct scsi_device_handler { struct scsi_dh_data { struct scsi_device_handler *scsi_dh; struct scsi_device *sdev; - struct kref kref; }; #define to_scsi_device(d) \ diff --git a/include/scsi/scsi_dh.h b/include/scsi/scsi_dh.h index 620c723ee8ed..99c9196fe606 100644 --- a/include/scsi/scsi_dh.h +++ b/include/scsi/scsi_dh.h @@ -59,7 +59,6 @@ enum { extern int scsi_dh_activate(struct request_queue *, activate_complete, void *); extern int scsi_dh_handler_exist(const char *); extern int scsi_dh_attach(struct request_queue *, const char *); -extern void scsi_dh_detach(struct request_queue *); extern const char *scsi_dh_attached_handler_name(struct request_queue *, gfp_t); extern int scsi_dh_set_params(struct request_queue *, const char *); #else @@ -77,10 +76,6 @@ static inline int scsi_dh_attach(struct request_queue *req, const char *name) { return SCSI_DH_NOSYS; } -static inline void scsi_dh_detach(struct request_queue *q) -{ - return; -} static inline const char *scsi_dh_attached_handler_name(struct request_queue *q, gfp_t gfp) { |