Failed to load firmware error in radeon gpu driver code.

[Vijay K Puliyala]

We get Failed to load firmware error in radeon gpu driver code. This is compiler warning being treating as an error. I fixed it was by adding below diff.
 
error log :"radeon_cp: Failed to load firmware "%s"\n", fw_name);

diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
index 0b1e19345f43..170404be09ae 100644
--- a/drivers/gpu/drm/radeon/r100.c
+++ b/drivers/gpu/drm/radeon/r100.c
@@ -1059,7 +1059,11 @@ static int r100_cp_init_microcode(struct radeon_device *rdev)
 
        err = request_firmware(&rdev->me_fw, fw_name, rdev->dev);
        if (err) {
-               pr_err("radeon_cp: Failed to load firmware \"%s\"\n", fw_name);
+               if (fw_name) {
+                       pr_err("radeon_cp: Failed to load firmware \"%s\"\n", fw_name);
+               } else {
+                       pr_err("radeon_cp: Failed to load firmware (null)\n");  
+               }
        } else if (rdev->me_fw->size % 8) {
                pr_err("radeon_cp: Bogus length %zu in firmware \"%s\"\n",
                       rdev->me_fw->size, fw_name);

Thanks
Vijay Kumar