linux-kernel - [PATCH AUTOSEL 4.19 27/32] drm: msm: Fix add_gpu

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Date:   Tue,  6 Aug 2019 17:35:15 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Jeffrey Hugo <jeffrey.l.hugo@...il.com>,
        Rob Clark <robdclark@...il.com>,
        Sean Paul <seanpaul@...omium.org>,
        Sasha Levin <sashal@...nel.org>, linux-arm-msm@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 4.19 27/32] drm: msm: Fix add_gpu_components

From: Jeffrey Hugo <jeffrey.l.hugo@...il.com>

[ Upstream commit 9ca7ad6c7706edeae331c1632d0c63897418ebad ]

add_gpu_components() adds found GPU nodes from the DT to the match list,
regardless of the status of the nodes.  This is a problem, because if the
nodes are disabled, they should not be on the match list because they will
not be matched.  This prevents display from initing if a GPU node is
defined, but it's status is disabled.

Fix this by checking the node's status before adding it to the match list.

Fixes: dc3ea265b856 (drm/msm: Drop the gpu binding)
Reviewed-by: Rob Clark <robdclark@...il.com>
Signed-off-by: Jeffrey Hugo <jeffrey.l.hugo@...il.com>
Signed-off-by: Sean Paul <seanpaul@...omium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190626180015.45242-1-jeffrey.l.hugo@gmail.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/msm/msm_drv.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index ed9a3a1e50efb..dbfd2c006f740 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -1284,7 +1284,8 @@ static int add_gpu_components(struct device *dev,
 	if (!np)
 		return 0;
 
-	drm_of_component_match_add(dev, matchptr, compare_of, np);
+	if (of_device_is_available(np))
+		drm_of_component_match_add(dev, matchptr, compare_of, np);
 
 	of_node_put(np);
 
-- 
2.20.1