drm/nouveau: completely fail init if we fail to map the PRAMIN BAR

On cards where there's a specific BAR for PRAMIN, we used to try and fall
back to the "legacy" aperture within the mmio BAR.

This is doomed to cause problems, so lets just fail completely as there's
obviously something else very wrong anyway.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nouveau_state.c b/drivers/gpu/drm/nouveau/nouveau_state.c
index 147e59c4015148e4b645648346b2e959370d3dcf..b02a231d6937489fe972bfc813dc72d5d421aa70 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_state.c
+++ b/drivers/gpu/drm/nouveau/nouveau_state.c
@@ -779,29 +779,24 @@ int nouveau_load(struct drm_device *dev, unsigned long flags)
                        return ret;
        }
 
-       /* map larger RAMIN aperture on NV40 cards */
-       dev_priv->ramin  = NULL;
+       /* Map PRAMIN BAR, or on older cards, the aperture withing BAR0 */
        if (dev_priv->card_type >= NV_40) {
                int ramin_bar = 2;
                if (pci_resource_len(dev->pdev, ramin_bar) == 0)
                        ramin_bar = 3;
 
                dev_priv->ramin_size = pci_resource_len(dev->pdev, ramin_bar);
-               dev_priv->ramin = ioremap(
-                               pci_resource_start(dev->pdev, ramin_bar),
+               dev_priv->ramin =
+                       ioremap(pci_resource_start(dev->pdev, ramin_bar),
                                dev_priv->ramin_size);
                if (!dev_priv->ramin) {
-                       NV_ERROR(dev, "Failed to init RAMIN mapping, "
-                                     "limited instance memory available\n");
+                       NV_ERROR(dev, "Failed to PRAMIN BAR");
+                       return -ENOMEM;
                }
-       }
-
-       /* On older cards (or if the above failed), create a map covering
-        * the BAR0 PRAMIN aperture */
-       if (!dev_priv->ramin) {
+       } else {
                dev_priv->ramin_size = 1 * 1024 * 1024;
                dev_priv->ramin = ioremap(mmio_start_offs + NV_RAMIN,
-                                                       dev_priv->ramin_size);
+                                         dev_priv->ramin_size);
                if (!dev_priv->ramin) {
                        NV_ERROR(dev, "Failed to map BAR0 PRAMIN.\n");
                        return -ENOMEM;