From: Oliver Neukum <oneukum@suse.com>
Date: Wed, 17 Feb 2016 10:52:43 +0000 (+0100)
Subject: usb: hub: fix a typo in hub_port_init() leading to wrong logic
X-Git-Tag: firefly_0821_release~176^2~4^2~50^2~157
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=aa563cf3bc7ef570f449501ff7ab12f3b7080ff0;p=firefly-linux-kernel-4.4.55.git

usb: hub: fix a typo in hub_port_init() leading to wrong logic

commit 0d5ce778c43bf888328231bcdce05d5c860655aa upstream.

A typo of j for i led to a logic bug. To rule out future
confusion, the variable names are made meaningful.

Signed-off-by: Oliver Neukum <ONeukum@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index a44db86018c7..2a274884c7ea 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -4277,7 +4277,7 @@ hub_port_init(struct usb_hub *hub, struct usb_device *udev, int port1,
 {
 	struct usb_device	*hdev = hub->hdev;
 	struct usb_hcd		*hcd = bus_to_hcd(hdev->bus);
-	int			i, j, retval;
+	int			retries, operations, retval, i;
 	unsigned		delay = HUB_SHORT_RESET_TIME;
 	enum usb_device_speed	oldspeed = udev->speed;
 	const char		*speed;
@@ -4379,7 +4379,7 @@ hub_port_init(struct usb_hub *hub, struct usb_device *udev, int port1,
 	 * first 8 bytes of the device descriptor to get the ep0 maxpacket
 	 * value.
 	 */
-	for (i = 0; i < GET_DESCRIPTOR_TRIES; (++i, msleep(100))) {
+	for (retries = 0; retries < GET_DESCRIPTOR_TRIES; (++retries, msleep(100))) {
 		bool did_new_scheme = false;
 
 		if (use_new_scheme(udev, retry_counter)) {
@@ -4406,7 +4406,7 @@ hub_port_init(struct usb_hub *hub, struct usb_device *udev, int port1,
 			 * 255 is for WUSB devices, we actually need to use
 			 * 512 (WUSB1.0[4.8.1]).
 			 */
-			for (j = 0; j < 3; ++j) {
+			for (operations = 0; operations < 3; ++operations) {
 				buf->bMaxPacketSize0 = 0;
 				r = usb_control_msg(udev, usb_rcvaddr0pipe(),
 					USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
@@ -4432,7 +4432,7 @@ hub_port_init(struct usb_hub *hub, struct usb_device *udev, int port1,
 				 * reset. But only on the first attempt,
 				 * lest we get into a time out/reset loop
 				 */
-				if (r == 0  || (r == -ETIMEDOUT && j == 0))
+				if (r == 0  || (r == -ETIMEDOUT && retries == 0))
 					break;
 			}
 			udev->descriptor.bMaxPacketSize0 =
@@ -4464,7 +4464,7 @@ hub_port_init(struct usb_hub *hub, struct usb_device *udev, int port1,
 		 * authorization will assign the final address.
 		 */
 		if (udev->wusb == 0) {
-			for (j = 0; j < SET_ADDRESS_TRIES; ++j) {
+			for (operations = 0; operations < SET_ADDRESS_TRIES; ++operations) {
 				retval = hub_set_address(udev, devnum);
 				if (retval >= 0)
 					break;