[Nouveau] [PATCH] drm/nouveau: fix crash with noaccel=1

[Marcin Slusarz]

Reported-by: Ortwin Glück <odi at odi.ch>
Signed-off-by: Marcin Slusarz <marcin.slusarz at gmail.com>
---
 drivers/gpu/drm/nouveau/nouveau_abi16.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/nouveau/nouveau_abi16.c b/drivers/gpu/drm/nouveau/nouveau_abi16.c
index cc79c79..cbf1fc6 100644
--- a/drivers/gpu/drm/nouveau/nouveau_abi16.c
+++ b/drivers/gpu/drm/nouveau/nouveau_abi16.c
@@ -241,6 +241,10 @@ nouveau_abi16_ioctl_channel_alloc(ABI16_IOCTL_ARGS)
 
 	if (unlikely(!abi16))
 		return -ENOMEM;
+
+	if (!drm->channel)
+		return nouveau_abi16_put(abi16, -ENODEV);
+
 	client = nv_client(abi16->client);
 
 	if (init->fb_ctxdma_handle == ~0 || init->tt_ctxdma_handle == ~0)
-- 
1.7.12