[PATCH 3.8 114/166] rtlwifi: pci: Fix oops on driver unload

Kamal Mostafa
2014-01-15T21:52:08Z

From: Larry Finger <Larry.Finger@lwfinger.net>

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@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Kamal Mostafa <kamal@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