scsi_dh: move 'dh_state' sysfs attribute to generic code
As scsi_dh.c is now always compiled in we should be moving
the 'dh_state' attribute to the generic code.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
diff --git a/drivers/scsi/scsi_dh.c b/drivers/scsi/scsi_dh.c
index e7649ed..54d446c 100644
--- a/drivers/scsi/scsi_dh.c
+++ b/drivers/scsi/scsi_dh.c
@@ -153,76 +153,11 @@
module_put(sdev->handler->module);
}
-/*
- * Functions for sysfs attribute 'dh_state'
- */
-static ssize_t
-store_dh_state(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct scsi_device *sdev = to_scsi_device(dev);
- struct scsi_device_handler *scsi_dh;
- int err = -EINVAL;
-
- if (sdev->sdev_state == SDEV_CANCEL ||
- sdev->sdev_state == SDEV_DEL)
- return -ENODEV;
-
- if (!sdev->handler) {
- /*
- * Attach to a device handler
- */
- scsi_dh = scsi_dh_lookup(buf);
- if (!scsi_dh)
- return err;
- err = scsi_dh_handler_attach(sdev, scsi_dh);
- } else {
- if (!strncmp(buf, "detach", 6)) {
- /*
- * Detach from a device handler
- */
- sdev_printk(KERN_WARNING, sdev,
- "can't detach handler %s.\n",
- sdev->handler->name);
- err = -EINVAL;
- } else if (!strncmp(buf, "activate", 8)) {
- /*
- * Activate a device handler
- */
- if (sdev->handler->activate)
- err = sdev->handler->activate(sdev, NULL, NULL);
- else
- err = 0;
- }
- }
-
- return err<0?err:count;
-}
-
-static ssize_t
-show_dh_state(struct device *dev, struct device_attribute *attr, char *buf)
-{
- struct scsi_device *sdev = to_scsi_device(dev);
-
- if (!sdev->handler)
- return snprintf(buf, 20, "detached\n");
-
- return snprintf(buf, 20, "%s\n", sdev->handler->name);
-}
-
-static struct device_attribute scsi_dh_state_attr =
- __ATTR(dh_state, S_IRUGO | S_IWUSR, show_dh_state,
- store_dh_state);
-
int scsi_dh_add_device(struct scsi_device *sdev)
{
struct scsi_device_handler *devinfo = NULL;
const char *drv;
- int err;
-
- err = device_create_file(&sdev->sdev_gendev, &scsi_dh_state_attr);
- if (err)
- return err;
+ int err = 0;
drv = scsi_dh_find_driver(sdev);
if (drv)
@@ -238,11 +173,6 @@
scsi_dh_handler_detach(sdev);
}
-void scsi_dh_remove_device(struct scsi_device *sdev)
-{
- device_remove_file(&sdev->sdev_gendev, &scsi_dh_state_attr);
-}
-
/*
* scsi_register_device_handler - register a device handler personality
* module.