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[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>
This commit is contained in:
James Bottomley 2009-08-01 00:41:22 +00:00 committed by James Bottomley
parent 163f52b6cf
commit 43d8eb9cfd
3 changed files with 41 additions and 16 deletions
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22
drivers/misc/enclosure.c
View File

@ -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);

33
drivers/scsi/ses.c
View File

@ -616,18 +616,26 @@ static int ses_remove(struct device *dev)
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 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 scsi_device *sdev = to_scsi_device(cdev->parent);
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 @@ static void ses_intf_remove(struct device *cdev,
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,

2
include/linux/enclosure.h
View File

@ -122,7 +122,7 @@ enclosure_component_register(struct enclosure_device *, unsigned int,
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 *),