linux-kernel - [PATCH 4.5 055/238] usb: hub: fix a typo in hub_port

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Message-Id: <20160410183459.507963730@linuxfoundation.org>
Date:	Sun, 10 Apr 2016 11:33:52 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Oliver Neukum <ONeukum@...e.com>
Subject: [PATCH 4.5 055/238] usb: hub: fix a typo in hub_port_init() leading to wrong logic

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

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

From: Oliver Neukum <oneukum@...e.com>

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@...e.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/usb/core/hub.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -4292,7 +4292,7 @@ hub_port_init(struct usb_hub *hub, struc
 {
 	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;
@@ -4394,7 +4394,7 @@ hub_port_init(struct usb_hub *hub, struc
 	 * 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)) {
@@ -4421,7 +4421,7 @@ hub_port_init(struct usb_hub *hub, struc
 			 * 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,
@@ -4447,7 +4447,7 @@ hub_port_init(struct usb_hub *hub, struc
 				 * 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 =
@@ -4479,7 +4479,7 @@ hub_port_init(struct usb_hub *hub, struc
 		 * 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;