[Intel-gfx] drm/i915/guc: add enable_guc_loading parameter

[Dan Carpenter]

Hello Dave Gordon,

This is a semi-automatic email about new static checker warnings.

The patch fce91f22ff31: "drm/i915/guc: add enable_guc_loading
parameter" from May 20, 2016, leads to the following Smatch complaint:

    drivers/gpu/drm/i915/intel_guc_loader.c:418 intel_guc_setup()
    error: we previously assumed 'fw_path' could be null (see line 417)

drivers/gpu/drm/i915/intel_guc_loader.c
   416			goto fail;
   417		} else if (fw_path == NULL || *fw_path == '\0') {
                           ^^^^^^^^^^^^^^^
New check.

   418			if (*fw_path == '\0')
                            ^^^^^^^^^^^^^^^
Oops.

   419				DRM_INFO("No GuC firmware known for this platform\n");
   420			err = -ENODEV;

regards,
dan carpenter