Patch "irqchip/gic-v3-its: Add missing cache flushes" has been added to the 4.1-stable tree

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

irqchip/gic-v3-its: Add missing cache flushes

to the 4.1-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-gic-v3-its-add-missing-cache-flushes.patch
and it can be found in the queue-4.1 subdirectory.

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

From: Marc Zyngier <[email protected]>
Date: Sun, 13 Sep 2015 12:14:32 +0100
Subject: irqchip/gic-v3-its: Add missing cache flushes

From: Marc Zyngier <[email protected]>

commit 5a9a8915c8888b615521b17d70a4342187eae60b upstream.

When the ITS is configured for non-cacheable transactions, make sure that the allocated, zeroed memory is flushed to the Point of Coherency, allowing the ITS to observe the zeros instead of random garbage (or even get its own data overwritten by zeros being evicted from the cache...).

---
 drivers/irqchip/irq-gic-v3-its.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

@@ -921,8 +921,10 @@ retry_baser:
 			 * non-cacheable as well.
 			 */
 			shr = tmp & GITS_BASER_SHAREABILITY_MASK;
-			if (!shr)
+			if (!shr) {
 				cache = GITS_BASER_nC;
+				__flush_dcache_area(base, alloc_size);
+			}
 			goto retry_baser;
 		}
 

@@ -1163,6 +1165,8 @@ static struct its_device *its_create_dev
 		return NULL;
 	}
 
+	__flush_dcache_area(itt, sz);
+
 	dev->its = its;
 	dev->itt = itt;
 	dev->nr_ites = nr_ites;

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

queue-4.1/arm-kvm-fix-incorrect-device-to-ipa-mapping.patch queue-4.1/irqchip-gic-v3-its-add-missing-cache-flushes.patch queue-4.1/arm-kvm-disable-virtual-timer-even-if-the-guest-is-not-using-it.patch queue-4.1/irqchip-atmel-aic5-use-per-chip-mask-caches-in-mask-unmask.patch