mwifiex: send regulatory domain info to firmware only if alpha2 changed

On cfg80211 regulatory domain change, drivers gets alpha2 country
code or "00" in driver's notification handler.

In most cases, the pattern will be US, 00, US, 00, US, 00, US, ...
There is no need to send domain info to firmware in case of "00" or
with the same alpha2 country code.

Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/net/wireless/mwifiex/sta_ioctl.c b/drivers/net/wireless/mwifiex/sta_ioctl.c
index a09398fe9e2a..85f419825ecf 100644
--- a/drivers/net/wireless/mwifiex/sta_ioctl.c
+++ b/drivers/net/wireless/mwifiex/sta_ioctl.c
@@ -205,6 +205,14 @@ static int mwifiex_process_country_ie(struct mwifiex_private *priv,
                 return 0;
         }
 
+        if (!strncmp(priv->adapter->country_code, &country_ie[2], 2)) {
+                rcu_read_unlock();
+                wiphy_dbg(priv->wdev->wiphy,
+                          "11D: skip setting domain info in FW\n");
+                return 0;
+        }
+        memcpy(priv->adapter->country_code, &country_ie[2], 2);
+
         domain_info->country_code[0] = country_ie[2];
         domain_info->country_code[1] = country_ie[3];
         domain_info->country_code[2] = ' ';