From c3d79a83ca10d2026fd1cce096cde2d8e316592e Mon Sep 17 00:00:00 2001
From: Qiang Yu <yuq825@gmail.com>
Date: Sun, 22 Sep 2019 15:49:00 +0800
Subject: dma-buf/resv: fix exclusive fence get
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Git-commit: c3d79a83ca10d2026fd1cce096cde2d8e316592e
Patch-mainline: v5.4-rc4
References: bsc#1152489
This causes kernel crash when testing lima driver.
Cc: Christian König <christian.koenig@amd.com>
Fixes: b8c036dfc66f ("dma-buf: simplify reservation_object_get_fences_rcu a bit")
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190922074900.853-1-yuq825@gmail.com
Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
---
drivers/dma-buf/dma-resv.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/dma-buf/dma-resv.c b/drivers/dma-buf/dma-resv.c
index 42a8f3f11681..709002515550 100644
--- a/drivers/dma-buf/dma-resv.c
+++ b/drivers/dma-buf/dma-resv.c
@@ -471,7 +471,7 @@ int dma_resv_get_fences_rcu(struct dma_resv *obj,
if (pfence_excl)
*pfence_excl = fence_excl;
else if (fence_excl)
- shared[++shared_count] = fence_excl;
+ shared[shared_count++] = fence_excl;
if (!shared_count) {
kfree(shared);
--
2.28.0