drm/nvc0/vram: skip disabled PBFB subunits

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

diff --git a/drivers/gpu/drm/nouveau/nvc0_vram.c b/drivers/gpu/drm/nouveau/nvc0_vram.c
index 041ff2b2b6015488a7d1a1dbf54ee28c92366b9f..ce984d573a51d03bb6df5b6cc171ed4721a60533 100644 (file)
--- a/drivers/gpu/drm/nouveau/nvc0_vram.c
+++ b/drivers/gpu/drm/nouveau/nvc0_vram.c
@@ -110,22 +110,26 @@ nvc0_vram_init(struct drm_device *dev)
        u32 bsize = nv_rd32(dev, 0x10f20c);
        u32 offset, length;
        bool uniform = true;
-       int ret, i;
+       int ret, part;
 
        NV_DEBUG(dev, "0x100800: 0x%08x\n", nv_rd32(dev, 0x100800));
        NV_DEBUG(dev, "parts 0x%08x bcast_mem_amount 0x%08x\n", parts, bsize);
 
        /* read amount of vram attached to each memory controller */
-       for (i = 0; i < parts; i++) {
-               u32 psize = nv_rd32(dev, 0x11020c + (i * 0x1000));
+       part = 0;
+       while (parts) {
+               u32 psize = nv_rd32(dev, 0x11020c + (part++ * 0x1000));
+               if (psize == 0)
+                       continue;
+               parts--;
+
                if (psize != bsize) {
                        if (psize < bsize)
                                bsize = psize;
                        uniform = false;
                }
 
-               NV_DEBUG(dev, "%d: mem_amount 0x%08x\n", i, psize);
-
+               NV_DEBUG(dev, "%d: mem_amount 0x%08x\n", part, psize);
                dev_priv->vram_size += (u64)psize << 20;
        }