diff options
| author | Christoph Hellwig <hch@lst.de> | 2015-08-27 14:16:55 +0200 |
|---|---|---|
| committer | James Bottomley <JBottomley@Odin.com> | 2015-08-28 13:14:55 -0700 |
| commit | 566079c849cfe538e908c44ac11a9c4638db8f91 (patch) | |
| tree | 02c85d770138d16929a764fd0cbea8628dbc54b9 /drivers/scsi | |
| parent | 1bab0de0274fbe8c8ac92179e6705584c55ed169 (diff) | |
dm-mpath, scsi_dh: request scsi_dh modules in scsi_dh, not dm-mpath
This way we can reused the same code any attachment method, not just those
requested from dm-mpath.
[jejb: fixup checkpatch error]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Acked-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/device_handler/scsi_dh.c | 36 |
1 files changed, 19 insertions, 17 deletions
diff --git a/drivers/scsi/device_handler/scsi_dh.c b/drivers/scsi/device_handler/scsi_dh.c index 869b5bd1ad25..3dfef5b0d298 100644 --- a/drivers/scsi/device_handler/scsi_dh.c +++ b/drivers/scsi/device_handler/scsi_dh.c @@ -29,7 +29,7 @@ static DEFINE_SPINLOCK(list_lock); static LIST_HEAD(scsi_dh_list); -static struct scsi_device_handler *get_device_handler(const char *name) +static struct scsi_device_handler *__scsi_dh_lookup(const char *name) { struct scsi_device_handler *tmp, *found = NULL; @@ -44,6 +44,19 @@ static struct scsi_device_handler *get_device_handler(const char *name) return found; } +static struct scsi_device_handler *scsi_dh_lookup(const char *name) +{ + struct scsi_device_handler *dh; + + dh = __scsi_dh_lookup(name); + if (!dh) { + request_module(name); + dh = __scsi_dh_lookup(name); + } + + return dh; +} + /* * device_handler_match_function - Match a device handler to a device * @sdev - SCSI device to be tested @@ -158,7 +171,8 @@ store_dh_state(struct device *dev, struct device_attribute *attr, /* * Attach to a device handler */ - if (!(scsi_dh = get_device_handler(buf))) + scsi_dh = scsi_dh_lookup(buf); + if (!scsi_dh) return err; err = scsi_dh_handler_attach(sdev, scsi_dh); } else { @@ -322,8 +336,7 @@ static int scsi_dh_notifier_remove(struct device *dev, void *data) */ int scsi_register_device_handler(struct scsi_device_handler *scsi_dh) { - - if (get_device_handler(scsi_dh->name)) + if (__scsi_dh_lookup(scsi_dh->name)) return -EBUSY; if (!scsi_dh->attach || !scsi_dh->detach) @@ -350,7 +363,7 @@ EXPORT_SYMBOL_GPL(scsi_register_device_handler); int scsi_unregister_device_handler(struct scsi_device_handler *scsi_dh) { - if (!get_device_handler(scsi_dh->name)) + if (!__scsi_dh_lookup(scsi_dh->name)) return -ENODEV; bus_for_each_dev(&scsi_bus_type, NULL, scsi_dh, @@ -455,17 +468,6 @@ int scsi_dh_set_params(struct request_queue *q, const char *params) EXPORT_SYMBOL_GPL(scsi_dh_set_params); /* - * scsi_dh_handler_exist - Return TRUE(1) if a device handler exists for - * the given name. FALSE(0) otherwise. - * @name - name of the device handler. - */ -int scsi_dh_handler_exist(const char *name) -{ - return (get_device_handler(name) != NULL); -} -EXPORT_SYMBOL_GPL(scsi_dh_handler_exist); - -/* * scsi_dh_attach - Attach device handler * @q - Request queue that is associated with the scsi_device * the handler should be attached to @@ -478,7 +480,7 @@ int scsi_dh_attach(struct request_queue *q, const char *name) struct scsi_device_handler *scsi_dh; int err = 0; - scsi_dh = get_device_handler(name); + scsi_dh = scsi_dh_lookup(name); if (!scsi_dh) return -EINVAL; |