The ice_allocate_sf() function returns error pointers on error.  It
doesn't return NULL.  Update the check to match.
Fixes: 177ef7f1e2a0 ("ice: base subfunction aux driver")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/6951d217-ac06-4482-a35d-15d757fd90a3@stanley.mountain
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
        vsi->flags = ICE_VSI_FLAG_INIT;
 
        priv = ice_allocate_sf(&adev->dev, pf);
-       if (!priv) {
+       if (IS_ERR(priv)) {
                dev_err(dev, "Subfunction devlink alloc failed");
-               return -ENOMEM;
+               return PTR_ERR(priv);
        }
 
        priv->dev = sf_dev;