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

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

1 files changed, 6 insertions, 4 deletions

diff --git a/drivers/gpu/drm/nouveau/core/subdev/bios/base.c b/drivers/gpu/drm/nouveau/core/subdev/bios/base.c
index e9df94f96d78..3de7d818be76 100644
--- 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 */