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staging: media: imx: fix OF node leak in imx_media_add_of_subdevs()

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[ Upstream commit 094f5c315f756b19198e6c401aa821ac0e868750 ]

imx_media_add_of_subdevs() calls of_parse_phandle() and passes the
obtained node to imx_media_of_add_csi(). The passed node is used in
v4l2_async_nf_add_fwnode(), which increments the refcount of the node.
Therefore, while the current implementation only releases the node when
imx_media_of_add_csi() fails, but should always release it. Call
of_node_put() right after imx_media_of_add_csi().

Fixes: dee747f881 ("media: imx: Don't register IPU subdevs/links if CSI port missing")
Signed-off-by: Joe Hattori <joe@pf.is.s.u-tokyo.ac.jp>
Reviewed-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Joe Hattori
2024-12-24 12:54:11 +09:00
committed by Greg Kroah-Hartman
parent 8f18d9e6f6
commit 1dd01dc435
1 changed files with 2 additions and 6 deletions
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8
drivers/staging/media/imx/imx-media-of.c
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@@ -55,22 +55,18 @@ int imx_media_add_of_subdevs(struct imx_media_dev *imxmd,
break;
ret = imx_media_of_add_csi(imxmd, csi_np);
of_node_put(csi_np);
if (ret) {
/* unavailable or already added is not an error */
if (ret == -ENODEV || ret == -EEXIST) {
of_node_put(csi_np);
continue;
}
/* other error, can't continue */
goto err_out;
return ret;
}
}
return 0;
err_out:
of_node_put(csi_np);
return ret;
}
EXPORT_SYMBOL_GPL(imx_media_add_of_subdevs);