[PATCH 4.0 069/148] staging: vt6655: lock MACvWriteBSSIDAddress.

From	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Newsgroups	linux.kernel
Subject	[PATCH 4.0 069/148] staging: vt6655: lock MACvWriteBSSIDAddress.
Date	2015-06-03 14:50 +0200
Message-ID	<pxghm-1gO-59@gated-at.bofh.it> (permalink)
References	<pxfOh-E4-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw

4.0-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Malcolm Priestley <tvboxspy@gmail.com>

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@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/staging/vt6655/device_main.c |    9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

--- a/drivers/staging/vt6655/device_main.c
+++ b/drivers/staging/vt6655/device_main.c
@@ -1414,9 +1414,16 @@ static void vnt_bss_info_changed(struct
 
 	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;
 


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next | Find similar | Unroll thread

Thread

[PATCH 4.0 069/148] staging: vt6655: lock MACvWriteBSSIDAddress. Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2015-06-03 14:50 +0200

csiph-web