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From:   Karol Herbst <kherbst@redhat.com>
To:     linux-kernel@vger.kernel.org
Cc:     Karol Herbst <kherbst@redhat.com>, Ben Skeggs <bskeggs@redhat.com>,
        Lyude Paul <lyude@redhat.com>,
        David Airlie <airlied@gmail.com>,
        Daniel Vetter <daniel@ffwll.ch>,
        Gourav Samaiya <gsamaiya@nvidia.com>,
        dri-devel@lists.freedesktop.org (open list:DRM DRIVER FOR NVIDIA
        GEFORCE/QUADRO GPUS),
        nouveau@lists.freedesktop.org (open list:DRM DRIVER FOR NVIDIA
        GEFORCE/QUADRO GPUS)
Subject: [PATCH] drm/nouveau/acr: Abort loading ACR if no firmware was found
Date:   Mon, 22 May 2023 22:18:38 +0200
Message-Id: <20230522201838.1496622-1-kherbst@redhat.com>
MIME-Version: 1.0
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Precedence: bulk

This fixes a NULL pointer access inside nvkm_acr_oneinit in case necessary
firmware files couldn't be loaded.

Closes: https://gitlab.freedesktop.org/drm/nouveau/-/issues/212
Fixes: 4b569ded09fd ("drm/nouveau/acr/ga102: initial support")
Signed-off-by: Karol Herbst <kherbst@redhat.com>
---
 drivers/gpu/drm/nouveau/nvkm/subdev/acr/base.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/acr/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/acr/base.c
index 795f3a649b12..6388234c352c 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/acr/base.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/acr/base.c
@@ -224,7 +224,7 @@ nvkm_acr_oneinit(struct nvkm_subdev *subdev)
 	u64 falcons;
 	int ret, i;
 
-	if (list_empty(&acr->hsfw)) {
+	if (list_empty(&acr->hsfw) || !acr->func->wpr_layout) {
 		nvkm_debug(subdev, "No HSFW(s)\n");
 		nvkm_acr_cleanup(acr);
 		return 0;
-- 
2.40.1