rt2800usb:fix hang during firmware load

The device 057c:8501 (AVM Fritz! WLAN v2 rev. B) boots into a state that does
not actually require loading a firmware file. The vendors driver finds out
about this by checking a firmware state register, so this patch adds this here.

Finally, with this patch applied, my wifi dongle actually becomes
useful (scan + connect to wpa network works).

Signed-off-by: Michael Braun <michael-dev@fami-braun.de>
Acked-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2800usb.c b/drivers/net/wireless/rt2x00/rt2800usb.c
index 11583ca3facb..e11dab2216c6 100644
--- a/drivers/net/wireless/rt2x00/rt2800usb.c
+++ b/drivers/net/wireless/rt2x00/rt2800usb.c
@@ -278,8 +278,13 @@ static int rt2800usb_write_firmware(struct rt2x00_dev *rt2x00dev,
         /*
          * Write firmware to device.
          */
-        rt2x00usb_register_multiwrite(rt2x00dev, FIRMWARE_IMAGE_BASE,
-                                      data + offset, length);
+        if (rt2800usb_autorun_detect(rt2x00dev)) {
+                rt2x00_info(rt2x00dev,
+                            "Firmware loading not required - NIC in AutoRun mode\n");
+        } else {
+                rt2x00usb_register_multiwrite(rt2x00dev, FIRMWARE_IMAGE_BASE,
+                                              data + offset, length);
+        }
 
         rt2x00usb_register_write(rt2x00dev, H2M_MAILBOX_CID, ~0);
         rt2x00usb_register_write(rt2x00dev, H2M_MAILBOX_STATUS, ~0);