From: Dmitry Osipenko <digetx@gmail.com>
Date: Mon, 23 Apr 2018 09:54:56 +0000 (+0300)
Subject: gpu: host1x: Fix dma_free_wc() argument in the error path
X-Git-Tag: v4.19~774^2~7^2~24
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=27db6a0073f162cdb15975c9d29d159d772b1ec0;p=platform%2Fkernel%2Flinux-rpi.git

gpu: host1x: Fix dma_free_wc() argument in the error path

If IOVA allocation or IOMMU mapping fails, dma_free_wc() is invoked with
size=0 because of a typo, that triggers "kernel BUG at mm/vmalloc.c:124!".

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
---

diff --git a/drivers/gpu/host1x/cdma.c b/drivers/gpu/host1x/cdma.c
index 28541b2..cf6caa9 100644
--- a/drivers/gpu/host1x/cdma.c
+++ b/drivers/gpu/host1x/cdma.c
@@ -127,7 +127,7 @@ static int host1x_pushbuffer_init(struct push_buffer *pb)
 iommu_free_iova:
 	__free_iova(&host1x->iova, alloc);
 iommu_free_mem:
-	dma_free_wc(host1x->dev, pb->alloc_size, pb->mapped, pb->phys);
+	dma_free_wc(host1x->dev, size, pb->mapped, pb->phys);
 
 	return err;
 }