linux-kernel - [PATCH 1/2] drm/nouveau/device: return error for unknown chipsets

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Message-Id: <20201006220528.13925-1-kherbst@redhat.com>
Date:   Wed,  7 Oct 2020 00:05:27 +0200
From:   Karol Herbst <kherbst@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     Karol Herbst <kherbst@...hat.com>,
        dann frazier <dann.frazier@...onical.com>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Dave Airlie <airlied@...hat.com>, stable@...r.kernel.org,
        Jeremy Cline <jcline@...hat.com>
Subject: [PATCH 1/2] drm/nouveau/device: return error for unknown chipsets

Previously the code relied on device->pri to be NULL and to fail probing
later. We really should just return an error inside nvkm_device_ctor for
unsupported GPUs.

Fixes: 24d5ff40a732 ("drm/nouveau/device: rework mmio mapping code to get rid of second map")

Signed-off-by: Karol Herbst <kherbst@...hat.com>
Cc: dann frazier <dann.frazier@...onical.com>
Cc: dri-devel <dri-devel@...ts.freedesktop.org>
Cc: Dave Airlie <airlied@...hat.com>
Cc: stable@...r.kernel.org
Reviewed-by: Jeremy Cline <jcline@...hat.com>
---
 drivers/gpu/drm/nouveau/nvkm/engine/device/base.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c b/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c
index 9f4ac2672cf2e..dcb70677d0acc 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c
@@ -3149,6 +3149,7 @@ nvkm_device_ctor(const struct nvkm_device_func *func,
 		case 0x168: device->chip = &nv168_chipset; break;
 		default:
 			nvdev_error(device, "unknown chipset (%08x)\n", boot0);
+			ret = -ENODEV;
 			goto done;
 		}
 
-- 
2.26.2