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28 lines
818 B
28 lines
818 B
6 years ago
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From d68d26f7f526fce52e71312501f3d07044a3c996 Mon Sep 17 00:00:00 2001
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From: Eric Anholt <eric@anholt.net>
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Date: Wed, 12 Apr 2017 17:52:56 -0700
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Subject: [PATCH 127/454] panel-raspberrypi-touchscreen: Fix NULL deref if
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probe order goes wrong.
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If the i2c driver hadn't pobed before the panel driver probes, then
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the client would be NULL but we were looking for an ERR_PTR in the
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error case.
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Signed-off-by: Eric Anholt <eric@anholt.net>
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---
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drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c | 3 +++
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1 file changed, 3 insertions(+)
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--- a/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
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+++ b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
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@@ -399,6 +399,9 @@ static struct i2c_client *rpi_touchscree
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of_node_put(node);
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+ if (!client)
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+ return ERR_PTR(-EPROBE_DEFER);
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+
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return client;
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}
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