[4.2.y-ckt stable] Patch "rtlwifi: rtl8821ae: Fix lockups on boot" 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: rtl8821ae: Fix lockups on boot

to the linux-4.2.y-queue branch of the 4.2.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-4.2.y-queue

This patch is scheduled to be released in version 4.2.8-ckt2.

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

For more information about the 4.2.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

---8<------------------------------------------------------------

>From 6006b89e6affe12ca52b48067b70bc856ca658d4 Mon Sep 17 00:00:00 2001
From: Larry Finger <Larry.Finger at lwfinger.net>
Date: Tue, 10 Nov 2015 10:46:11 -0600
Subject: rtlwifi: rtl8821ae: Fix lockups on boot

commit eeec5d0ef7ee54a75e09e861c3cc44177b8752c7 upstream.

In commit 54328e64047a5 ("rtlwifi: rtl8821ae: Fix system lockups on boot"),
an attempt was made to fix a regression introduced in commit 1277fa2ab2f9
("rtlwifi: Remove the clear interrupt routine from all drivers").
Unfortunately, there were logic errors in that patch that prevented
affected boxes from booting even after that patch was applied.

The actual cause of the original problem is unknown as none of the
developers have systems that are affected.

Fixes: 54328e64047a ("rtlwifi: rtl8821ae: Fix system lockups on boot")
Signed-off-by: Larry Finger <Larry.Finger at lwfinger.net>
Signed-off-by: Kalle Valo <kvalo at codeaurora.org>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 drivers/net/wireless/rtlwifi/rtl8821ae/hw.c | 2 +-
 drivers/net/wireless/rtlwifi/rtl8821ae/sw.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/rtlwifi/rtl8821ae/hw.c b/drivers/net/wireless/rtlwifi/rtl8821ae/hw.c
index 6e9418e..bbb789f 100644
--- a/drivers/net/wireless/rtlwifi/rtl8821ae/hw.c
+++ b/drivers/net/wireless/rtlwifi/rtl8821ae/hw.c
@@ -2272,7 +2272,7 @@ void rtl8821ae_enable_interrupt(struct ieee80211_hw *hw)
 	struct rtl_priv *rtlpriv = rtl_priv(hw);
 	struct rtl_pci *rtlpci = rtl_pcidev(rtl_pcipriv(hw));

-	if (!rtlpci->int_clear)
+	if (rtlpci->int_clear)
 		rtl8821ae_clear_interrupt(hw);/*clear it here first*/

 	rtl_write_dword(rtlpriv, REG_HIMR, rtlpci->irq_mask[0] & 0xFFFFFFFF);
diff --git a/drivers/net/wireless/rtlwifi/rtl8821ae/sw.c b/drivers/net/wireless/rtlwifi/rtl8821ae/sw.c
index 8ee141a..142bdff 100644
--- a/drivers/net/wireless/rtlwifi/rtl8821ae/sw.c
+++ b/drivers/net/wireless/rtlwifi/rtl8821ae/sw.c
@@ -448,7 +448,7 @@ MODULE_PARM_DESC(fwlps, "Set to 1 to use FW control power save (default 1)\n");
 MODULE_PARM_DESC(msi, "Set to 1 to use MSI interrupts mode (default 1)\n");
 MODULE_PARM_DESC(debug, "Set debug level (0-5) (default 0)");
 MODULE_PARM_DESC(disable_watchdog, "Set to 1 to disable the watchdog (default 0)\n");
-MODULE_PARM_DESC(int_clear, "Set to 1 to disable interrupt clear before set (default 0)\n");
+MODULE_PARM_DESC(int_clear, "Set to 0 to disable interrupt clear before set (default 1)\n");

 static SIMPLE_DEV_PM_OPS(rtlwifi_pm_ops, rtl_pci_suspend, rtl_pci_resume);

--
1.9.1