drm/nouveau/bios: check for null script pointers in parser

Allows us to be lazy elsewhere...

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nouveau_bios.c b/drivers/gpu/drm/nouveau/nouveau_bios.c
index 58d8c85..528fb60 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_bios.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bios.c
@@ -3771,6 +3771,10 @@ parse_init_table(struct nvbios *bios, uint16_t offset, struct init_exec *iexec)
        int count = 0, i, ret;
        uint8_t id;
 
+       /* catch NULL script pointers */
+       if (offset == 0)
+               return 0;
+
        /*
         * Loop until INIT_DONE causes us to break out of the loop
         * (or until offset > bios length just in case... )