[SCSI] ch: handle class_device_create failure properly
When class_device_create fails, ch_probe needs to fail too.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/drivers/scsi/ch.c b/drivers/scsi/ch.c
index cead0f5..765f2fc 100644
--- a/drivers/scsi/ch.c
+++ b/drivers/scsi/ch.c
@@ -913,29 +913,37 @@
static int ch_probe(struct device *dev)
{
struct scsi_device *sd = to_scsi_device(dev);
+ struct class_device *class_dev;
scsi_changer *ch;
-
+
if (sd->type != TYPE_MEDIUM_CHANGER)
return -ENODEV;
-
+
ch = kzalloc(sizeof(*ch), GFP_KERNEL);
if (NULL == ch)
return -ENOMEM;
ch->minor = ch_devcount;
sprintf(ch->name,"ch%d",ch->minor);
+
+ class_dev = class_device_create(ch_sysfs_class, NULL,
+ MKDEV(SCSI_CHANGER_MAJOR, ch->minor),
+ dev, "s%s", ch->name);
+ if (IS_ERR(class_dev)) {
+ printk(KERN_WARNING "ch%d: class_device_create failed\n",
+ ch->minor);
+ kfree(ch);
+ return PTR_ERR(class_dev);
+ }
+
mutex_init(&ch->lock);
ch->device = sd;
ch_readconfig(ch);
if (init)
ch_init_elem(ch);
- class_device_create(ch_sysfs_class, NULL,
- MKDEV(SCSI_CHANGER_MAJOR,ch->minor),
- dev, "s%s", ch->name);
-
sdev_printk(KERN_INFO, sd, "Attached scsi changer %s\n", ch->name);
-
+
spin_lock(&ch_devlist_lock);
list_add_tail(&ch->list,&ch_devlist);
ch_devcount++;
