Patch "pinctrl: cherryview: Mask all interrupts on Intel_Strago based systems" has been added to the 4.14-stable tree

This is a note to let you know that I've just added the patch titled

pinctrl: cherryview: Mask all interrupts on Intel_Strago based systems

to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
pinctrl-cherryview-mask-all-interrupts-on-intel_strago-based-systems.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Mika Westerberg <[email protected]>
Date: Mon, 4 Dec 2017 12:11:02 +0300
Subject: pinctrl: cherryview: Mask all interrupts on Intel_Strago based systems

From: Mika Westerberg <[email protected]>

commit d2b3c353595a855794f8b9df5b5bdbe8deb0c413 upstream.

Guenter Roeck reported an interrupt storm on a prototype system which is based on Cyan Chromebook. The root cause turned out to be a incorrectly configured pin that triggers spurious interrupts. This will be fixed in coreboot but currently we need to prevent the interrupt storm from happening by masking all interrupts (but not GPEs) on those systems.

---
 drivers/pinctrl/intel/pinctrl-cherryview.c |   16 ++++++++++++++++
 1 file changed, 16 insertions(+)

@@ -1620,6 +1620,22 @@ static int chv_gpio_probe(struct chv_pin
 			clear_bit(i, chip->irq_valid_mask);
 	}
 
+	/*
+	 * The same set of machines in chv_no_valid_mask[] have incorrectly
+	 * configured GPIOs that generate spurious interrupts so we use
+	 * this same list to apply another quirk for them.
+	 *
+	 * See also https://bugzilla.kernel.org/show_bug.cgi?id=197953.
+	 */
+	if (!need_valid_mask) {
+		/*
+		 * Mask all interrupts the community is able to generate
+		 * but leave the ones that can only generate GPEs unmasked.
+		 */
+		chv_writel(GENMASK(31, pctrl->community->nirqs),
+			   pctrl->regs + CHV_INTMASK);
+	}
+
 	/* Clear all interrupts */
 	chv_writel(0xffff, pctrl->regs + CHV_INTSTAT);
 

Patches currently in stable-queue which might be from [email protected] are

queue-4.14/pinctrl-cherryview-mask-all-interrupts-on-intel_strago-based-systems.patch