mwifiex: fix corner case association failure

commit a6139b62 upstream.

This patch corrects the error case in association path by returning
-1. Earlier "media_connected" used to remain on in this error case
causing failure for further association attempts.
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Fixes: b887664d ('mwifiex: channel switch handling for station')
Signed-off-by: Cathy Luo <cluo@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
[ luis: backported to 3.16:
  - file rename: drivers/net/wireless/marvell/mwifiex/sta_ioctl.c ->
    drivers/net/wireless/mwifiex/sta_ioctl.c
  - adjusted context ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>

drivers/net/wireless/mwifiex/sta_ioctl.c

@@ -313,6 +313,7 @@ int mwifiex_bss_start(struct mwifiex_private *priv, struct cfg80211_bss *bss,
 			mwifiex_dbg(adapter, ERROR,
 				    "Attempt to reconnect on csa closed chan(%d)\n",
 				    bss_desc->channel);
+			ret = -1;
 			goto done;
 		}