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| author | Ben Skeggs <bskeggs@redhat.com> | 2012-10-09 04:21:36 +0200 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2012-10-09 04:21:36 +0200 |
| commit | 9a334cd0de2f43b29c192548000692bad52edfc6 (patch) | |
| tree | 65efb161974816d1112a4dec38984e346323df09 | |
| parent | drm/nv98/crypt: fix fuc build with latest envyas (diff) | |
| download | linux-9a334cd0de2f43b29c192548000692bad52edfc6.tar.xz linux-9a334cd0de2f43b29c192548000692bad52edfc6.zip | |
drm/nouveau/bios: fix shadowing of ACPI ROMs larger than 64KiB
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
| -rw-r--r-- | drivers/gpu/drm/nouveau/core/subdev/bios/base.c | 21 |
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; } } |