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

[Kamal Mostafa]

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-3.8.y-queue branch of the 3.8.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-3.8.y-queue

This patch is scheduled to be released in version 3.8.13.16.

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

For more information about the 3.8.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

------

>From 3680a43b3c244395ecddc689b98e6e4bb0676271 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: Kamal Mostafa <kamal 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 4261e8e..8fdb04c 100644
--- a/drivers/net/wireless/rtlwifi/pci.c
+++ b/drivers/net/wireless/rtlwifi/pci.c
@@ -677,6 +677,8 @@ 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 */
@@ -1565,6 +1567,7 @@ 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);

@@ -1582,7 +1585,6 @@ 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