[3.5.y.z extended stable] Patch "rtlwifi: pci: Fix oops on driver unload" has been added to staging queue

[Luis Henriques]

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

    rtlwifi: pci: Fix oops on driver unload

to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue

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

For more information about the 3.5.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From e3bbab92f4820dbe24bc30c544640faaa497121d Mon Sep 17 00:00:00 2001
From: Larry Finger <Larry.Finger at lwfinger.net>
Date: Wed, 11 Dec 2013 17:13:10 -0600
Subject: rtlwifi: pci: Fix oops on driver unload

commit 9278db6279e28d4d433bc8a848e10b4ece8793ed upstream.

On Fedora systems, unloading rtl8192ce causes an oops. This patch fixes the
problem reported at https://bugzilla.redhat.com/show_bug.cgi?id=852761.

Signed-off-by: Larry Finger <Larry.Finger at lwfinger.net>
Signed-off-by: John W. Linville <linville at tuxdriver.com>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 drivers/net/wireless/rtlwifi/pci.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/rtlwifi/pci.c b/drivers/net/wireless/rtlwifi/pci.c
index 2062ea1..4c4226f 100644
--- a/drivers/net/wireless/rtlwifi/pci.c
+++ b/drivers/net/wireless/rtlwifi/pci.c
@@ -679,6 +679,8 @@ static void _rtl_pci_rx_interrupt(struct ieee80211_hw *hw)
 	};
 	int index = rtlpci->rx_ring[rx_queue_idx].idx;

+	if (rtlpci->driver_is_goingto_unload)
+		return;
 	/*RX NORMAL PKT */
 	while (count--) {
 		/*rx descriptor */
@@ -1555,6 +1557,7 @@ static void rtl_pci_stop(struct ieee80211_hw *hw)
 	 */
 	set_hal_stop(rtlhal);

+	rtlpci->driver_is_goingto_unload = true;
 	rtlpriv->cfg->ops->disable_interrupt(hw);
 	cancel_work_sync(&rtlpriv->works.lps_leave_work);

@@ -1572,7 +1575,6 @@ static void rtl_pci_stop(struct ieee80211_hw *hw)
 	ppsc->rfchange_inprogress = true;
 	spin_unlock_irqrestore(&rtlpriv->locks.rf_ps_lock, flags);

-	rtlpci->driver_is_goingto_unload = true;
 	rtlpriv->cfg->ops->hw_disable(hw);
 	/* some things are not needed if firmware not available */
 	if (!rtlpriv->max_fw_size)
--
1.8.3.2