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From 0f5fd4538774aa6c936bb8fc78611c3113bf19d7 Mon Sep 17 00:00:00 2001
From: Dom Cobley <popcornmix@gmail.com>
Date: Mon, 17 Apr 2023 15:21:41 +0100
Subject: [PATCH] vc4_drv: Avoid panic when booted with no kms
If kms/fkms overlay is not present we have no matching drivers
and so match is NULL.
It is not safe to call component_master_add_with_match with a null match argument.
So don't do that
Signed-off-by: Dom Cobley <popcornmix@gmail.com>
---
drivers/gpu/drm/vc4/vc4_drv.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/gpu/drm/vc4/vc4_drv.c
+++ b/drivers/gpu/drm/vc4/vc4_drv.c
@@ -456,6 +456,9 @@ static int vc4_platform_drm_probe(struct
vc4_match_add_drivers(dev, &match,
component_drivers, ARRAY_SIZE(component_drivers));
+ if (!match)
+ return -ENODEV;
+
return component_master_add_with_match(dev, &vc4_drm_ops, match);
}
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