[PATCH 4.9 02/87] usbip: usbip_host: delete device from busid_table after rebind

[Greg Kroah-Hartman]

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Shuah Khan (Samsung OSG) <shuah@xxxxxxxxxx>

commit 1e180f167d4e413afccbbb4a421b48b2de832549 upstream.

Device is left in the busid_table after unbind and rebind. Rebind
initiates usb bus scan and the original driver claims the device.
After rescan the device should be deleted from the busid_table as
it no longer belongs to usbip_host.

Fix it to delete the device after device_attach() succeeds.

Signed-off-by: Shuah Khan (Samsung OSG) <shuah@xxxxxxxxxx>
Cc: stable <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/usb/usbip/stub_main.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/drivers/usb/usbip/stub_main.c
+++ b/drivers/usb/usbip/stub_main.c
@@ -201,6 +201,9 @@ static ssize_t rebind_store(struct devic
 	if (!bid)
 		return -ENODEV;
 
+	/* mark the device for deletion so probe ignores it during rescan */
+	bid->status = STUB_BUSID_OTHER;
+
 	/* device_attach() callers should hold parent lock for USB */
 	if (bid->udev->dev.parent)
 		device_lock(bid->udev->dev.parent);
@@ -212,6 +215,9 @@ static ssize_t rebind_store(struct devic
 		return ret;
 	}
 
+	/* delete device from busid_table */
+	del_match_busid((char *) buf);
+
 	return count;
 }