Patch "irqchip/gicv3: Handle loop timeout proper" has been added to the 4.8-stable tree

Patch "irqchip/gicv3: Handle loop timeout proper" has been added to the 4.8-stable tree

[gregkh]

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

    irqchip/gicv3: Handle loop timeout proper

to the 4.8-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-gicv3-handle-loop-timeout-proper.patch
and it can be found in the queue-4.8 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 d102eb5c1ac5e6743b1c6d145c06a25d98ad1375 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Fri, 14 Oct 2016 10:26:21 +0300
Subject: irqchip/gicv3: Handle loop timeout proper

From: Dan Carpenter <dan.carpenter@oracle.com>

commit d102eb5c1ac5e6743b1c6d145c06a25d98ad1375 upstream.

The timeout loop terminates when the loop count is zero, but the decrement
of the count variable is post check. So count is -1 when we check for the
timeout and therefor the error message is supressed.

Change it to predecrement, so the error message is emitted.

[ tglx: Massaged changelog ]

Fixes: a2c225101234 ("irqchip: gic-v3: Refactor gic_enable_redist to support both enabling and disabling")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: kernel-janitors@vger.kernel.org
Cc: Jason Cooper <jason@lakedaemon.net>
Link: http://lkml.kernel.org/r/20161014072534.GA15168@mwanda
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/irqchip/irq-gic-v3.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -153,7 +153,7 @@ static void gic_enable_redist(bool enabl
 			return;	/* No PM support in this redistributor */
 	}
 
-	while (count--) {
+	while (--count) {
 		val = readl_relaxed(rbase + GICR_WAKER);
 		if (enable ^ (bool)(val & GICR_WAKER_ChildrenAsleep))
 			break;


Patches currently in stable-queue which might be from dan.carpenter@oracle.com are

queue-4.8/scsi-zfcp-spin_lock_irqsave-is-not-nestable.patch
queue-4.8/irqchip-gicv3-handle-loop-timeout-proper.patch