USB: ti_usb_3410_5052: fix big-endian firmware handling

commit e877dd2f2581628b7119df707d4cf03d940cff49 upstream.

Fix endianess bugs in firmware handling introduced by commits cb7a7c6a
("ti_usb_3410_5052: add Multi-Tech modem support") and 05a3d905
("ti_usb_3410_5052: support alternate firmware") which made the driver
use the wrong firmware for certain devices on big-endian machines.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/serial/ti_usb_3410_5052.c b/drivers/usb/serial/ti_usb_3410_5052.c
index 3f8e663..2575779 100644 (file)
--- a/drivers/usb/serial/ti_usb_3410_5052.c
+++ b/drivers/usb/serial/ti_usb_3410_5052.c
@@ -1687,12 +1687,13 @@ static int ti_download_firmware(struct ti_device *tdev)
 
        dbg("%s\n", __func__);
        /* try ID specific firmware first, then try generic firmware */
-       sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
-           dev->descriptor.idProduct);
+       sprintf(buf, "ti_usb-v%04x-p%04x.fw",
+                       le16_to_cpu(dev->descriptor.idVendor),
+                       le16_to_cpu(dev->descriptor.idProduct));
        if ((status = request_firmware(&fw_p, buf, &dev->dev)) != 0) {
                buf[0] = '\0';
-               if (dev->descriptor.idVendor == MTS_VENDOR_ID) {
-                       switch (dev->descriptor.idProduct) {
+               if (le16_to_cpu(dev->descriptor.idVendor) == MTS_VENDOR_ID) {
+                       switch (le16_to_cpu(dev->descriptor.idProduct)) {
                        case MTS_CDMA_PRODUCT_ID:
                                strcpy(buf, "mts_cdma.fw");
                                break;