releases/4.19.98/drm-nouveau-bar-nv50-check-bar1-vmm-return-value.patch

From 307a312df9c43fdea286ad17f748aaf777cc434a Mon Sep 17 00:00:00 2001
From: Jon Derrick <jonathan.derrick@intel.com>
Date: Fri, 15 Mar 2019 18:05:15 -0600
Subject: drm/nouveau/bar/nv50: check bar1 vmm return value

From: Jon Derrick <jonathan.derrick@intel.com>

commit 307a312df9c43fdea286ad17f748aaf777cc434a upstream.

Check bar1's new vmm creation return value for errors.

Signed-off-by: Jon Derrick <jonathan.derrick@intel.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Sushma Kalakota <sushmax.kalakota@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpu/drm/nouveau/nvkm/subdev/bar/nv50.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/gpu/drm/nouveau/nvkm/subdev/bar/nv50.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bar/nv50.c
@@ -174,6 +174,8 @@ nv50_bar_oneinit(struct nvkm_bar *base)
 
 	ret = nvkm_vmm_new(device, start, limit-- - start, NULL, 0,
 			   &bar1_lock, "bar1", &bar->bar1_vmm);
+	if (ret)
+		return ret;
 
 	atomic_inc(&bar->bar1_vmm->engref[NVKM_SUBDEV_BAR]);
 	bar->bar1_vmm->debug = bar->base.subdev.debug;