summaryrefslogtreecommitdiff
path: root/drivers/usb/core/file.c
diff options
context:
space:
mode:
authorJoel Becker <joel.becker@oracle.com>2010-10-15 13:03:09 -0700
committerJoel Becker <joel.becker@oracle.com>2010-10-15 13:03:09 -0700
commitfc3718918f13ad72827d62d36ea0f5fb55090644 (patch)
tree4f9551256e02d08be37bab137f3d94182a67504c /drivers/usb/core/file.c
parent7bdb0d18bfd381cc5491eb95973ec5604b356c7e (diff)
parentd4396eafe402b710a8535137b3bf2abe6c059a15 (diff)
Merge branch 'globalheartbeat-2' of git://oss.oracle.com/git/smushran/linux-2.6 into ocfs2-merge-window
Conflicts: fs/ocfs2/ocfs2.h
Diffstat (limited to 'drivers/usb/core/file.c')
-rw-r--r--drivers/usb/core/file.c35
1 files changed, 16 insertions, 19 deletions
diff --git a/drivers/usb/core/file.c b/drivers/usb/core/file.c
index f06f5dbc8cdc..1e6ccef2cf0c 100644
--- a/drivers/usb/core/file.c
+++ b/drivers/usb/core/file.c
@@ -159,9 +159,9 @@ void usb_major_cleanup(void)
int usb_register_dev(struct usb_interface *intf,
struct usb_class_driver *class_driver)
{
- int retval = -EINVAL;
+ int retval;
int minor_base = class_driver->minor_base;
- int minor = 0;
+ int minor;
char name[20];
char *temp;
@@ -173,12 +173,17 @@ int usb_register_dev(struct usb_interface *intf,
*/
minor_base = 0;
#endif
- intf->minor = -1;
-
- dbg ("looking for a minor, starting at %d", minor_base);
if (class_driver->fops == NULL)
- goto exit;
+ return -EINVAL;
+ if (intf->minor >= 0)
+ return -EADDRINUSE;
+
+ retval = init_usb_class();
+ if (retval)
+ return retval;
+
+ dev_dbg(&intf->dev, "looking for a minor, starting at %d", minor_base);
down_write(&minor_rwsem);
for (minor = minor_base; minor < MAX_USB_MINORS; ++minor) {
@@ -186,20 +191,12 @@ int usb_register_dev(struct usb_interface *intf,
continue;
usb_minors[minor] = class_driver->fops;
-
- retval = 0;
+ intf->minor = minor;
break;
}
up_write(&minor_rwsem);
-
- if (retval)
- goto exit;
-
- retval = init_usb_class();
- if (retval)
- goto exit;
-
- intf->minor = minor;
+ if (intf->minor < 0)
+ return -EXFULL;
/* create a usb class device for this usb interface */
snprintf(name, sizeof(name), class_driver->name, minor - minor_base);
@@ -213,11 +210,11 @@ int usb_register_dev(struct usb_interface *intf,
"%s", temp);
if (IS_ERR(intf->usb_dev)) {
down_write(&minor_rwsem);
- usb_minors[intf->minor] = NULL;
+ usb_minors[minor] = NULL;
+ intf->minor = -1;
up_write(&minor_rwsem);
retval = PTR_ERR(intf->usb_dev);
}
-exit:
return retval;
}
EXPORT_SYMBOL_GPL(usb_register_dev);