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authorBen Skeggs <bskeggs@redhat.com>2012-10-09 06:21:36 +0400
committerBen Skeggs <bskeggs@redhat.com>2012-10-09 06:21:36 +0400
commit9a334cd0de2f43b29c192548000692bad52edfc6 (patch)
tree65efb161974816d1112a4dec38984e346323df09 /drivers/gpu
parentb9f10852fcb1f09369d931dcbfbaad89ad1da4ad (diff)
downloadlinux-9a334cd0de2f43b29c192548000692bad52edfc6.tar.xz
drm/nouveau/bios: fix shadowing of ACPI ROMs larger than 64KiB
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/nouveau/core/subdev/bios/base.c21
1 files changed, 10 insertions, 11 deletions
diff --git a/drivers/gpu/drm/nouveau/core/subdev/bios/base.c b/drivers/gpu/drm/nouveau/core/subdev/bios/base.c
index 2fbb6df697cd..dcb5c2befc92 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/bios/base.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/bios/base.c
@@ -185,23 +185,22 @@ static void
nouveau_bios_shadow_acpi(struct nouveau_bios *bios)
{
struct pci_dev *pdev = nv_device(bios)->pdev;
- int cnt = 65536 / 4096;
- int ret;
+ int ret, cnt, i;
+ u8 data[3];
if (!nouveau_acpi_rom_supported(pdev))
return;
- bios->data = kmalloc(65536, GFP_KERNEL);
bios->size = 0;
- if (!bios->data)
- return;
-
- while (cnt--) {
- ret = nouveau_acpi_get_bios_chunk(bios->data, bios->size, 4096);
- if (ret != 4096)
- return;
+ if (nouveau_acpi_get_bios_chunk(data, 0, 3) == 3)
+ bios->size = data[2] * 512;
- bios->size += 4096;
+ 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;
}
}