Am 20.03.2018 um 14:16 schrieb Tom St Denis:
The offset inside the page wasn't included in the copy call meaning
the start of the page was being read/written instead.
Reported-by: Jay Cornwall <[email protected]>
Signed-off-by: Tom St Denis <[email protected]>
Good catch, patch is Reviewed-by: Christian König
<[email protected]>.
Regards,
Christian.
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 291dd3d600cd..d2ab40494a4c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -1996,7 +1996,7 @@ static ssize_t amdgpu_iomem_read(struct file *f, char
__user *buf,
return -EPERM;
ptr = kmap(p);
- r = copy_to_user(buf, ptr, bytes);
+ r = copy_to_user(buf, ptr + off, bytes);
kunmap(p);
if (r)
return -EFAULT;
@@ -2040,7 +2040,7 @@ static ssize_t amdgpu_iomem_write(struct file *f, const
char __user *buf,
return -EPERM;
ptr = kmap(p);
- r = copy_from_user(ptr, buf, bytes);
+ r = copy_from_user(ptr + off, buf, bytes);
kunmap(p);
if (r)
return -EFAULT;
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