[PATCH] libertas: region code values specified as 8bit

This patch strips away possible mess in regioncode (eg. on my card - 88W8305
chipset - I get 0x3031 instead of expected 0x0031 and as a result the driver
defaults to USA region which is obviously incorrect). Following patch fixes
the issue.

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/net/wireless/libertas/cmdresp.c b/drivers/net/wireless/libertas/cmdresp.c
index 4c36e63ae7b0..d64ad87db459 100644
--- a/drivers/net/wireless/libertas/cmdresp.c
+++ b/drivers/net/wireless/libertas/cmdresp.c
@@ -174,7 +174,11 @@ static int wlan_ret_get_hw_spec(wlan_private * priv,
         lbs_deb_cmd("GET_HW_SPEC: hardware interface 0x%x, hardware spec 0x%04x\n",
                hwspec->hwifversion, hwspec->version);
 
-        adapter->regioncode = le16_to_cpu(hwspec->regioncode);
+        /* Clamp region code to 8-bit since FW spec indicates that it should
+         * only ever be 8-bit, even though the field size is 16-bit.  Some firmware
+         * returns non-zero high 8 bits here.
+         */
+        adapter->regioncode = le16_to_cpu(hwspec->regioncode) & 0xFF;
 
         for (i = 0; i < MRVDRV_MAX_REGION_CODE; i++) {
                 /* use the region code to search for the index */