From: Christian Lamparter <chunkeey@googlemail.com>
Date: Fri, 17 Sep 2010 20:47:28 +0000 (+0200)
Subject: carl9170: abort tasklet during usb reset
X-Git-Tag: v3.12-rc1~8399^2~265^2^2~50
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=cf6487d0d656994cc43851b8c2384741e220f7ac;p=kernel%2Fkernel-generic.git

carl9170: abort tasklet during usb reset

This patch prevents the tasklet code from
interfering while the firmware is down for
an unscheduled maintenance.

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/drivers/net/wireless/ath/carl9170/usb.c b/drivers/net/wireless/ath/carl9170/usb.c
index fde918d..1e7c274 100644
--- a/drivers/net/wireless/ath/carl9170/usb.c
+++ b/drivers/net/wireless/ath/carl9170/usb.c
@@ -367,6 +367,9 @@ static void carl9170_usb_tasklet(unsigned long data)
 {
 	struct ar9170 *ar = (struct ar9170 *) data;
 
+	if (!IS_INITIALIZED(ar))
+		return;
+
 	carl9170_usb_rx_work(ar);
 
 	/*