drm/nouveau/bios: fix shadowing from PROM on big-endian systems

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

diff --git a/drivers/gpu/drm/nouveau/core/subdev/bios/base.c b/drivers/gpu/drm/nouveau/core/subdev/bios/base.c
index e9df94f..3de7d81 100644 (file)
--- a/drivers/gpu/drm/nouveau/core/subdev/bios/base.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/bios/base.c
@@ -168,7 +168,8 @@ nouveau_bios_shadow_prom(struct nouveau_bios *bios)
         */
        i = 16;
        do {
-               if ((nv_rd32(bios, 0x300000) & 0xffff) == 0xaa55)
+               u32 data = le32_to_cpu(nv_rd32(bios, 0x300000)) & 0xffff;
+               if (data == 0xaa55)
                        break;
        } while (i--);
 
@@ -176,14 +177,15 @@ nouveau_bios_shadow_prom(struct nouveau_bios *bios)
                goto out;
 
        /* read entire bios image to system memory */
-       bios->size = ((nv_rd32(bios, 0x300000) >> 16) & 0xff) * 512;
+       bios->size = (le32_to_cpu(nv_rd32(bios, 0x300000)) >> 16) & 0xff;
+       bios->size = bios->size * 512;
        if (!bios->size)
                goto out;
 
        bios->data = kmalloc(bios->size, GFP_KERNEL);
        if (bios->data) {
-               for (i = 0; i < bios->size; i+=4)
-                       nv_wo32(bios, i, nv_rd32(bios, 0x300000 + i));
+               for (i = 0; i < bios->size; i += 4)
+                       ((u32 *)bios->data)[i/4] = nv_rd32(bios, 0x300000 + i);
        }
 
        /* check the PCI record header */