libertas: Check return status of command functions

Return status of lbs_prepare_and_send_command and lbs_cmd_with_response
functions is not checked at some places. Those checks are added.

Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Acked-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 7 insertions, 3 deletions

diff --git a/drivers/net/wireless/libertas/wext.c b/drivers/net/wireless/libertas/wext.c
index 69dd19bf9558..4594841cd4af 100644
--- a/drivers/net/wireless/libertas/wext.c
+++ b/drivers/net/wireless/libertas/wext.c
@@ -832,7 +832,7 @@ static struct iw_statistics *lbs_get_wireless_stats(struct net_device *dev)
         u32 rssi_qual;
         u32 tx_qual;
         u32 quality = 0;
-        int stats_valid = 0;
+        int ret, stats_valid = 0;
         u8 rssi;
         u32 tx_retries;
         struct cmd_ds_802_11_get_log log;
@@ -881,7 +881,9 @@ static struct iw_statistics *lbs_get_wireless_stats(struct net_device *dev)
 
         memset(&log, 0, sizeof(log));
         log.hdr.size = cpu_to_le16(sizeof(log));
-        lbs_cmd_with_response(priv, CMD_802_11_GET_LOG, &log);
+        ret = lbs_cmd_with_response(priv, CMD_802_11_GET_LOG, &log);
+        if (ret)
+                goto out;
 
         tx_retries = le32_to_cpu(log.retry);
 
@@ -909,8 +911,10 @@ static struct iw_statistics *lbs_get_wireless_stats(struct net_device *dev)
         stats_valid = 1;
 
         /* update stats asynchronously for future calls */
-        lbs_prepare_and_send_command(priv, CMD_802_11_RSSI, 0,
+        ret = lbs_prepare_and_send_command(priv, CMD_802_11_RSSI, 0,
                                         0, 0, NULL);
+        if (ret)
+                lbs_pr_err("RSSI command failed\n");
 out:
         if (!stats_valid) {
                 priv->wstats.miss.beacon = 0;