Commit 864917a3 authored by Tom St Denis's avatar Tom St Denis Committed by Alex Deucher
Browse files

drm/amd/amdgpu: fix offset into page with amdgpu_iomem debugfs file 



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: default avatarJay Cornwall <Jay.Cornwall@amd.com>
Signed-off-by: default avatarTom St Denis <tom.stdenis@amd.com>
Reviewed-by: default avatarChristian König <christian.koenig@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent bd08a8d9

drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c

+2 −2
Original line number Diff line number Diff line
@@ -2021,7 +2021,7 @@ 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;
@@ -2065,7 +2065,7 @@ 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;