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authorBen Skeggs <bskeggs@redhat.com>2015-11-19 06:18:34 +0300
committerBen Skeggs <bskeggs@redhat.com>2015-11-25 08:31:21 +0300
commit954329412ea45ad6b509aa26f1441941fd432823 (patch)
tree154064166e6a137474bc54111e5e143e9de3911b /drivers/gpu/drm/nouveau/nouveau_acpi.c
parent950950327bd63b7f54808c7028839a37899035f9 (diff)
downloadlinux-954329412ea45ad6b509aa26f1441941fd432823.tar.xz
drm/nouveau/bios: return actual size of the buffer retrieved via _ROM
Fixes detection of a failed attempt at fetching the entire ROM image in one-shot (a violation of the spec, that works a lot of the time). Tested on a HP Zbook 15 G2. Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_acpi.c')
-rw-r--r--drivers/gpu/drm/nouveau/nouveau_acpi.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.c b/drivers/gpu/drm/nouveau/nouveau_acpi.c
index 8b8332e46f24..d5e6938cc6bc 100644
--- a/drivers/gpu/drm/nouveau/nouveau_acpi.c
+++ b/drivers/gpu/drm/nouveau/nouveau_acpi.c
@@ -367,6 +367,7 @@ static int nouveau_rom_call(acpi_handle rom_handle, uint8_t *bios,
return -ENODEV;
}
obj = (union acpi_object *)buffer.pointer;
+ len = min(len, (int)obj->buffer.length);
memcpy(bios+offset, obj->buffer.pointer, len);
kfree(buffer.pointer);
return len;