[3.19.y-ckt stable] Patch "staging: vt6655: lock MACvWriteBSSIDAddress." has been added to staging queue

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

    staging: vt6655: lock MACvWriteBSSIDAddress.

to the linux-3.19.y-queue branch of the 3.19.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.19.y-queue

This patch is scheduled to be released in version 3.19.8-ckt2.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.19.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

------

>From a4bb18ed2b4e7dfb7ccf4b15145c0a1e2c3bcd00 Mon Sep 17 00:00:00 2001
From: Malcolm Priestley <tvboxspy at gmail.com>
Date: Tue, 21 Apr 2015 22:33:02 +0100
Subject: staging: vt6655: lock MACvWriteBSSIDAddress.

commit 664a5c1d1e33cd89cb7883e8c74638cc482b5da7 upstream.

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

lock call with spin_lock_irqsave.

Signed-off-by: Malcolm Priestley <tvboxspy at gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 drivers/staging/vt6655/device_main.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/vt6655/device_main.c b/drivers/staging/vt6655/device_main.c
index 6815c45..b7f6d95 100644
--- a/drivers/staging/vt6655/device_main.c
+++ b/drivers/staging/vt6655/device_main.c
@@ -1443,9 +1443,16 @@ static void vnt_bss_info_changed(struct ieee80211_hw *hw,

 	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;

--
1.9.1