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Subject[PATCH] drm/msm: Fix wrong size calculation
Date
For example, memory-region in .dts as below,
reg = <0x0 0x50000000 0x0 0x20000000>

We can get below values,
struct resource r;
r.start = 0x50000000;
r.end = 0x6fffffff;

So the size should be:
size = r.end - r.start + 1 = 0x20000000

Signed-off-by: Xianting Tian <xianting.tian@linux.alibaba.com>
---
drivers/gpu/drm/msm/msm_drv.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index 892c04365..f04a2337d 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -466,7 +466,7 @@ static int msm_init_vram(struct drm_device *dev)
of_node_put(node);
if (ret)
return ret;
- size = r.end - r.start;
+ size = r.end - r.start + 1;
DRM_INFO("using VRAM carveout: %lx@%pa\n", size, &r.start);

/* if we have no IOMMU, then we need to use carveout allocator.
--
2.17.1
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