Patch "dma-buf/sw-sync: Fix the is-signaled test to handle u32 wraparound" has been added to the 4.9-stable tree

[<gregkh@linuxfoundation.org>]

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

    dma-buf/sw-sync: Fix the is-signaled test to handle u32 wraparound

to the 4.9-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:
     dma-buf-sw-sync-fix-the-is-signaled-test-to-handle-u32-wraparound.patch
and it can be found in the queue-4.9 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 61894b02716f122dd7662d5d89f5b2245ca551e2 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Thu, 29 Jun 2017 13:59:25 +0100
Subject: dma-buf/sw-sync: Fix the is-signaled test to handle u32 wraparound

From: Chris Wilson <chris@chris-wilson.co.uk>

commit 61894b02716f122dd7662d5d89f5b2245ca551e2 upstream.

Use the canonical __dma_fence_is_later() to compare the fence seqno
against the timeline seqno to check if the fence is signaled.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Sean Paul <seanpaul@chromium.org>
Cc: Gustavo Padovan <gustavo@padovan.org>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170629125930.821-2-chris@chris-wilson.co.uk
[s/dma_fence/fence/g - gregkh]
Cc: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/dma-buf/sw_sync.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/dma-buf/sw_sync.c
+++ b/drivers/dma-buf/sw_sync.c
@@ -219,7 +219,7 @@ static bool timeline_fence_signaled(stru
 {
 	struct sync_timeline *parent = fence_parent(fence);
 
-	return (fence->seqno > parent->value) ? false : true;
+	return !__fence_is_later(fence->seqno, parent->value);
 }
 
 static bool timeline_fence_enable_signaling(struct fence *fence)


Patches currently in stable-queue which might be from chris@chris-wilson.co.uk are

queue-4.9/dma-buf-sw-sync-fix-the-is-signaled-test-to-handle-u32-wraparound.patch
queue-4.9/dma-fence-clear-fence-status-during-dma_fence_init.patch
queue-4.9/dma-buf-sw-sync-fix-locking-around-sync_timeline-lists.patch
queue-4.9/dma-fence-wrap-querying-the-fence-status.patch
queue-4.9/dma-buf-sw_sync-clean-up-list-before-signaling-the-fence.patch
queue-4.9/dma-buf-sw-sync-reduce-irqsave-irqrestore-from-known-context.patch
queue-4.9/dma-buf-sw_sync-move-timeline_fence_ops-around.patch
queue-4.9/dma-buf-sw-sync-prevent-user-overflow-on-timeline-advance.patch
queue-4.9/dma-fence-introduce-drm_fence_set_error-helper.patch
queue-4.9/dma-buf-sw_sync-force-signal-all-unsignaled-fences-on-dying-timeline.patch
queue-4.9/dma-buf-sw-sync-use-an-rbtree-to-sort-fences-in-the-timeline.patch
queue-4.9/dma-buf-sw-sync-sync_pt-is-private-and-of-fixed-size.patch
queue-4.9/dma-buf-dma-fence-extract-__dma_fence_is_later.patch