Patch "irqchip/atmel-aic: Fix wrong bit operation for IRQ priority" has been added to the 4.4-stable tree

Patch "irqchip/atmel-aic: Fix wrong bit operation for IRQ priority" has been added to the 4.4-stable tree

[gregkh]

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

    irqchip/atmel-aic: Fix wrong bit operation for IRQ priority

to the 4.4-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:
     irqchip-atmel-aic-fix-wrong-bit-operation-for-irq-priority.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 49f34134aea74f19ca016f055d25ee55ec359dee Mon Sep 17 00:00:00 2001
From: Milo Kim <milo.kim@ti.com>
Date: Wed, 13 Jan 2016 16:19:50 +0900
Subject: irqchip/atmel-aic: Fix wrong bit operation for IRQ priority

From: Milo Kim <milo.kim@ti.com>

commit 49f34134aea74f19ca016f055d25ee55ec359dee upstream.

Atmel AIC has common structure for SMR (Source Mode Register).

  bit[6:5] Interrupt source type
  bit[2:0] Priority level
  Other bits are unused.

To update new priority value, bit[2:0] should be cleared first and then
new priority level can be written. However, aic_common_set_priority()
helper clears source type bits instead of priority bits.
This patch fixes wrong mask bit operation.

Fixes: b1479ebb7720 "irqchip: atmel-aic: Add atmel AIC/AIC5 drivers"
Signed-off-by: Milo Kim <milo.kim@ti.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Ludovic Desroches <ludovic.desroches@atmel.com>
Cc: Nicholas Ferre <nicolas.ferre@atmel.com>
Link: http://lkml.kernel.org/r/1452669592-3401-2-git-send-email-milo.kim@ti.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/irqchip/irq-atmel-aic-common.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/irqchip/irq-atmel-aic-common.c
+++ b/drivers/irqchip/irq-atmel-aic-common.c
@@ -86,7 +86,7 @@ int aic_common_set_priority(int priority
 	    priority > AT91_AIC_IRQ_MAX_PRIORITY)
 		return -EINVAL;
 
-	*val &= AT91_AIC_PRIOR;
+	*val &= ~AT91_AIC_PRIOR;
 	*val |= priority;
 
 	return 0;


Patches currently in stable-queue which might be from milo.kim@ti.com are

queue-4.4/irqchip-atmel-aic-fix-wrong-bit-operation-for-irq-priority.patch