mwifiex: correct antenna number with high bits reserved

High bits of antenna number are reserved in hardware spec,
using low 4 bits represent supported antenna.

Signed-off-by: Cathy Luo <cluo@marvell.com>
Signed-off-by: Xinming Hu <huxm@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/net/wireless/marvell/mwifiex/cmdevt.c b/drivers/net/wireless/marvell/mwifiex/cmdevt.c
index 874660052055..7014f440e6f8 100644
--- a/drivers/net/wireless/marvell/mwifiex/cmdevt.c
+++ b/drivers/net/wireless/marvell/mwifiex/cmdevt.c
@@ -1529,7 +1529,8 @@ int mwifiex_ret_get_hw_spec(struct mwifiex_private *priv,
 
         adapter->fw_release_number = le32_to_cpu(hw_spec->fw_release_number);
         adapter->fw_api_ver = (adapter->fw_release_number >> 16) & 0xff;
-        adapter->number_of_antenna = le16_to_cpu(hw_spec->number_of_antenna);
+        adapter->number_of_antenna =
+                        le16_to_cpu(hw_spec->number_of_antenna) & 0xf;
 
         if (le32_to_cpu(hw_spec->dot_11ac_dev_cap)) {
                 adapter->is_hw_11ac_capable = true;