mwifiex: add get_antenna support for cfg80211

Since commit de3bb771f471 ("cfg80211: add more warnings for inconsistent
ops") the wireless core warns if a driver implements a cfg80211 callback
but doesn't implements the inverse operation.

The mwifiex driver defines a .set_antenna handler but not a .get_antenna
so this not only makes the core to print a warning when creating a new
wiphy but also the antenna isn't reported to user-space apps such as iw.

This patch queries the antenna to the firmware so is properly reported to
user-space. With this patch, the wireless core does not warn anymore and:

$ iw phy phy0 info | grep Antennas
        Available Antennas: TX 0x3 RX 0x3
        Configured Antennas: TX 0x3 RX 0x3

Signed-off-by: Shengzhen Li <szli@marvell.com>
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
[javier: expand the commit message]
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Tested-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/net/wireless/marvell/mwifiex/fw.h b/drivers/net/wireless/marvell/mwifiex/fw.h
index 8e4145abdbfa..cef72343f5b6 100644
--- a/drivers/net/wireless/marvell/mwifiex/fw.h
+++ b/drivers/net/wireless/marvell/mwifiex/fw.h
@@ -462,6 +462,9 @@ enum P2P_MODES {
 #define HostCmd_ACT_SET_RX              0x0001
 #define HostCmd_ACT_SET_TX              0x0002
 #define HostCmd_ACT_SET_BOTH            0x0003
+#define HostCmd_ACT_GET_RX              0x0004
+#define HostCmd_ACT_GET_TX              0x0008
+#define HostCmd_ACT_GET_BOTH            0x000c
 
 #define RF_ANTENNA_AUTO                 0xFFFF