1 files changed, 20 insertions, 12 deletions

diff --git a/drivers/gpu/drm/nouveau/core/subdev/bios/base.c b/drivers/gpu/drm/nouveau/core/subdev/bios/base.c
index 70ca7d5a..dd11194 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/bios/base.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/bios/base.c
@@ -63,7 +63,7 @@ nouveau_bios_shadow_of(struct nouveau_bios *bios)
 	struct pci_dev *pdev = nv_device(bios)->pdev;
 	struct device_node *dn;
 	const u32 *data;
-	int size, i;
+	int size;
 
 	dn = pci_device_to_OF_node(pdev);
 	if (!dn) {
@@ -210,11 +210,19 @@ nouveau_bios_shadow_acpi(struct nouveau_bios *bios)
 		return;
 
 	bios->data = kmalloc(bios->size, GFP_KERNEL);
-	for (i = 0; bios->data && i < bios->size; i += cnt) {
-		cnt = min((bios->size - i), (u32)4096);
-		ret = nouveau_acpi_get_bios_chunk(bios->data, i, cnt);
-		if (ret != cnt)
-			break;
+	if (bios->data) {
+		/* disobey the acpi spec - much faster on at least w530 ... */
+		ret = nouveau_acpi_get_bios_chunk(bios->data, 0, bios->size);
+		if (ret != bios->size ||
+		    nvbios_checksum(bios->data, bios->size)) {
+			/* ... that didn't work, ok, i'll be good now */
+			for (i = 0; i < bios->size; i += cnt) {
+				cnt = min((bios->size - i), (u32)4096);
+				ret = nouveau_acpi_get_bios_chunk(bios->data, i, cnt);
+				if (ret != cnt)
+					break;
+			}
+		}
 	}
 }
 
@@ -358,42 +366,42 @@ nouveau_bios_shadow(struct nouveau_bios *bios)
 }
 
 static u8
-nouveau_bios_rd08(struct nouveau_object *object, u32 addr)
+nouveau_bios_rd08(struct nouveau_object *object, u64 addr)
 {
 	struct nouveau_bios *bios = (void *)object;
 	return bios->data[addr];
 }
 
 static u16
-nouveau_bios_rd16(struct nouveau_object *object, u32 addr)
+nouveau_bios_rd16(struct nouveau_object *object, u64 addr)
 {
 	struct nouveau_bios *bios = (void *)object;
 	return get_unaligned_le16(&bios->data[addr]);
 }
 
 static u32
-nouveau_bios_rd32(struct nouveau_object *object, u32 addr)
+nouveau_bios_rd32(struct nouveau_object *object, u64 addr)
 {
 	struct nouveau_bios *bios = (void *)object;
 	return get_unaligned_le32(&bios->data[addr]);
 }
 
 static void
-nouveau_bios_wr08(struct nouveau_object *object, u32 addr, u8 data)
+nouveau_bios_wr08(struct nouveau_object *object, u64 addr, u8 data)
 {
 	struct nouveau_bios *bios = (void *)object;
 	bios->data[addr] = data;
 }
 
 static void
-nouveau_bios_wr16(struct nouveau_object *object, u32 addr, u16 data)
+nouveau_bios_wr16(struct nouveau_object *object, u64 addr, u16 data)
 {
 	struct nouveau_bios *bios = (void *)object;
 	put_unaligned_le16(data, &bios->data[addr]);
 }
 
 static void
-nouveau_bios_wr32(struct nouveau_object *object, u32 addr, u32 data)
+nouveau_bios_wr32(struct nouveau_object *object, u64 addr, u32 data)
 {
 	struct nouveau_bios *bios = (void *)object;
 	put_unaligned_le32(data, &bios->data[addr]);