drm/nv50/disp: fix a potential oops in supervisor handling

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

diff --git a/drivers/gpu/drm/nouveau/core/engine/disp/nv50.c b/drivers/gpu/drm/nouveau/core/engine/disp/nv50.c
index 1e85f36c705f34faba1c93d94af337b1e4d90abc..26e962b7e702a07fabf713cbcd2ca00ac6527ae5 100644 (file)
--- a/drivers/gpu/drm/nouveau/core/engine/disp/nv50.c
+++ b/drivers/gpu/drm/nouveau/core/engine/disp/nv50.c
@@ -1270,7 +1270,7 @@ exec_clkcmp(struct nv50_disp_priv *priv, int head, int id, u32 pclk, u32 *conf)
        i--;
 
        outp = exec_lookup(priv, head, i, ctrl, &data, &ver, &hdr, &cnt, &len, &info1);
-       if (!data)
+       if (!outp)
                return NULL;
 
        if (outp->info.location == 0) {