[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>
diff --git a/drivers/misc/enclosure.c b/drivers/misc/enclosure.c
index 789d121..850706a 100644
--- a/drivers/misc/enclosure.c
+++ b/drivers/misc/enclosure.c
@@ -332,19 +332,25 @@
* 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);
diff --git a/drivers/scsi/ses.c b/drivers/scsi/ses.c
index e1b8c82..be593c8 100644
--- a/drivers/scsi/ses.c
+++ b/drivers/scsi/ses.c
@@ -616,18 +616,26 @@
return 0;
}
-static void ses_intf_remove(struct device *cdev,
- struct class_interface *intf)
+static void ses_intf_remove_component(struct scsi_device *sdev)
{
- struct scsi_device *sdev = to_scsi_device(cdev->parent);
+ struct enclosure_device *edev, *prev = NULL;
+
+ while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) {
+ prev = edev;
+ if (!enclosure_remove_device(edev, &sdev->sdev_gendev))
+ break;
+ }
+ if (edev)
+ put_device(&edev->edev);
+}
+
+static void ses_intf_remove_enclosure(struct scsi_device *sdev)
+{
struct enclosure_device *edev;
struct ses_device *ses_dev;
- if (!scsi_device_enclosure(sdev))
- return;
-
/* exact match to this enclosure */
- edev = enclosure_find(cdev->parent, NULL);
+ edev = enclosure_find(&sdev->sdev_gendev, NULL);
if (!edev)
return;
@@ -645,6 +653,17 @@
enclosure_unregister(edev);
}
+static void ses_intf_remove(struct device *cdev,
+ struct class_interface *intf)
+{
+ struct scsi_device *sdev = to_scsi_device(cdev->parent);
+
+ if (!scsi_device_enclosure(sdev))
+ ses_intf_remove_component(sdev);
+ else
+ ses_intf_remove_enclosure(sdev);
+}
+
static struct class_interface ses_interface = {
.add_dev = ses_intf_add,
.remove_dev = ses_intf_remove,
diff --git a/include/linux/enclosure.h b/include/linux/enclosure.h
index d77811e..90d1c21 100644
--- a/include/linux/enclosure.h
+++ b/include/linux/enclosure.h
@@ -122,7 +122,7 @@
enum enclosure_component_type, const char *);
int enclosure_add_device(struct enclosure_device *enclosure, int component,
struct device *dev);
-int enclosure_remove_device(struct enclosure_device *enclosure, int component);
+int enclosure_remove_device(struct enclosure_device *, struct device *);
struct enclosure_device *enclosure_find(struct device *dev,
struct enclosure_device *start);
int enclosure_for_each_device(int (*fn)(struct enclosure_device *, void *),
