[SCSI] ses: add support for enclosure component hot removal

Right at the moment, hot removal of a device within an enclosure does
nothing (because the intf_remove only copes with enclosure removal not
with component removal). Fix this by adding a function to remove the
component.  Also needed to fix the prototype of
enclosure_remove_device, since we know the device we've removed but
not the internal component number

Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 14 insertions, 8 deletions

diff --git a/drivers/misc/enclosure.c b/drivers/misc/enclosure.c
index 789d12128c24..850706a5e553 100644
--- a/drivers/misc/enclosure.c
+++ b/drivers/misc/enclosure.c
@@ -332,19 +332,25 @@ EXPORT_SYMBOL_GPL(enclosure_add_device);
  * Returns zero on success or an error.
  *
  */
-int enclosure_remove_device(struct enclosure_device *edev, int component)
+int enclosure_remove_device(struct enclosure_device *edev, struct device *dev)
 {
         struct enclosure_component *cdev;
+        int i;
 
-        if (!edev || component >= edev->components)
+        if (!edev || !dev)
                 return -EINVAL;
 
-        cdev = &edev->component[component];
-
-        device_del(&cdev->cdev);
-        put_device(cdev->dev);
-        cdev->dev = NULL;
-        return device_add(&cdev->cdev);
+        for (i = 0; i < edev->components; i++) {
+                cdev = &edev->component[i];
+                if (cdev->dev == dev) {
+                        enclosure_remove_links(cdev);
+                        device_del(&cdev->cdev);
+                        put_device(dev);
+                        cdev->dev = NULL;
+                        return device_add(&cdev->cdev);
+                }
+        }
+        return -ENODEV;
 }
 EXPORT_SYMBOL_GPL(enclosure_remove_device);