The buf pointer was not being incremented inside the loop
meaning the same block of data would be read or written
repeatedly.
(v2) Change 'buf' pointer to uint8_t* type
Cc: stable@vger.kernel.org
Fixes:
09ac4fcb3f25 ("drm/ttm: Implement vm_operations_struct.access v2")
Signed-off-by: Tom St Denis <tom.stdenis@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
static int ttm_bo_vm_access_kmap(struct ttm_buffer_object *bo,
unsigned long offset,
- void *buf, int len, int write)
+ uint8_t *buf, int len, int write)
{
unsigned long page = offset >> PAGE_SHIFT;
unsigned long bytes_left = len;
ttm_bo_kunmap(&map);
page++;
+ buf += bytes;
bytes_left -= bytes;
offset = 0;
} while (bytes_left);