drm/nouveau/bios: improve error handling when reading the vbios from ACPI

Reported-by: Pawel Sikora <pawel.sikora@agmk.net>
Signed-off-by: Martin Peres <martin.peres@labri.fr>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/core/subdev/bios/base.c b/drivers/gpu/drm/nouveau/core/subdev/bios/base.c
index dcb5c2b..f65bfed 100644 (file)
--- a/drivers/gpu/drm/nouveau/core/subdev/bios/base.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/bios/base.c
@@ -188,8 +188,10 @@ nouveau_bios_shadow_acpi(struct nouveau_bios *bios)
        int ret, cnt, i;
        u8  data[3];
 
-       if (!nouveau_acpi_rom_supported(pdev))
+       if (!nouveau_acpi_rom_supported(pdev)) {
+               bios->data = NULL;
                return;
+       }
 
        bios->size = 0;
        if (nouveau_acpi_get_bios_chunk(data, 0, 3) == 3)