drm/amdgpu: fix the warning about the expression (int)size - len

Converting size from size_t to int may overflow.
v2: keep reverse xmas tree order (Christian)

Signed-off-by: Jesse Zhang <jesse.zhang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
index f5d0fa207a88b7b0db6d99ccc037a5bb2ae9c562..b62ae3c91a9dbf10d6b8f00a3cd4c426679591f4 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
@@ -2065,12 +2065,13 @@ static ssize_t amdgpu_reset_dump_register_list_write(struct file *f,
        struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(f)->i_private;
        char reg_offset[11];
        uint32_t *new = NULL, *tmp = NULL;
-       int ret, i = 0, len = 0;
+       unsigned int len = 0;
+       int ret, i = 0;
 
        do {
                memset(reg_offset, 0, 11);
                if (copy_from_user(reg_offset, buf + len,
-                                       min(10, ((int)size-len)))) {
+                                       min(10, (size-len)))) {
                        ret = -EFAULT;
                        goto error_free;
                }