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authorChristoph Hellwig <hch@lst.de>2015-08-27 14:16:54 +0200
committerJames Bottomley <JBottomley@Odin.com>2015-08-28 13:14:54 -0700
commit1bab0de0274fbe8c8ac92179e6705584c55ed169 (patch)
tree3a2bbd51706e6ec0a279cbc0011d996de7320aa7 /include/scsi
parent36dd5acd196574d41de3e81d8264df475bbb7123 (diff)
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.h1
-rw-r--r--include/scsi/scsi_dh.h5
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)
{

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