commit 664a5c1d1e33cd89cb7883e8c74638cc482b5da7
author Malcolm Priestley <tvboxspy@gmail.com> Tue Apr 21 22:33:02 2015 +0100
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> Fri May 08 14:35:23 2015 +0200
tree a369a563f427727f8a7e0de83c862e217c14a71f
parent 032ed34a84263cdb396e4318fed6a92ed50add26

staging: vt6655: lock MACvWriteBSSIDAddress.

This function selects page 1 and cause intermittent problems on
interrupt handler.

lock call with spin_lock_irqsave.

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Cc: <stable@vger.kernel.org> # v3.19+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vt6655/device_main.c

diff --git a/drivers/staging/vt6655/device_main.c b/drivers/staging/vt6655/device_main.c
index b386047..0343ae3 100644
--- a/drivers/staging/vt6655/device_main.c
+++ b/drivers/staging/vt6655/device_main.c
@@ -1417,9 +1417,16 @@
 
 	priv->current_aid = conf->aid;
 
-	if (changed & BSS_CHANGED_BSSID)
+	if (changed & BSS_CHANGED_BSSID) {
+		unsigned long flags;
+
+		spin_lock_irqsave(&priv->lock, flags);
+
 		MACvWriteBSSIDAddress(priv->PortOffset, (u8 *)conf->bssid);
 
+		spin_unlock_irqrestore(&priv->lock, flags);
+	}
+
 	if (changed & BSS_CHANGED_BASIC_RATES) {
 		priv->basic_rates = conf->basic_rates;