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>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index ddfed81..676324a 100644 (file)
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -3033,7 +3033,7 @@ 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;
@@ -3135,7 +3135,7 @@ 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))) {
                if (USE_NEW_SCHEME(retry_counter) && !(hcd->driver->flags & HCD_USB3)) {
                        struct usb_device_descriptor *buf;
                        int r = 0;
@@ -3151,7 +3151,7 @@ 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,
@@ -3177,7 +3177,7 @@ 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 =
@@ -3209,7 +3209,7 @@ 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;