linux-kernel - [PATCH 5.8 009/124] drm/nouveau/device: return error for unknown chipsets

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Message-Id: <20201012133147.302175389@linuxfoundation.org>
Date:   Mon, 12 Oct 2020 15:30:13 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Karol Herbst <kherbst@...hat.com>,
        dann frazier <dann.frazier@...onical.com>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Dave Airlie <airlied@...hat.com>,
        Jeremy Cline <jcline@...hat.com>
Subject: [PATCH 5.8 009/124] drm/nouveau/device: return error for unknown chipsets

From: Karol Herbst <kherbst@...hat.com>

commit c3e0276c31ca8c7b8615da890727481260d4676f upstream.

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>
Signed-off-by: Dave Airlie <airlied@...hat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201006220528.13925-1-kherbst@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/nouveau/nvkm/engine/device/base.c |    1 +
 1 file changed, 1 insertion(+)

--- 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_devic
 		case 0x168: device->chip = &nv168_chipset; break;
 		default:
 			nvdev_error(device, "unknown chipset (%08x)\n", boot0);
+			ret = -ENODEV;
 			goto done;
 		}