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soc: amlogic: canvas: fix device leak on lookup

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Make sure to drop the reference taken to the canvas platform device when
looking up its driver data.

Note that holding a reference to a device does not prevent its driver
data from going away so there is no point in keeping the reference.

Also note that commit 28f851e6af ("soc: amlogic: canvas: add missing
put_device() call in meson_canvas_get()") fixed the leak in a lookup
error path, but the reference is still leaking on success.

Fixes: d4983983d9 ("soc: amlogic: add meson-canvas driver")
Cc: stable@vger.kernel.org	# 4.20: 28f851e6af
Cc: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Link: https://patch.msgid.link/20250926142454.5929-2-johan@kernel.org
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
This commit is contained in:
Johan Hovold
2025-09-26 16:24:53 +02:00
committed by Neil Armstrong
parent 3a86608788
commit 32200f4828
1 changed files with 2 additions and 3 deletions
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5
drivers/soc/amlogic/meson-canvas.c
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@@ -73,10 +73,9 @@ struct meson_canvas *meson_canvas_get(struct device *dev)
* current state, this driver probe cannot return -EPROBE_DEFER
*/
canvas = dev_get_drvdata(&canvas_pdev->dev);
if (!canvas) {
put_device(&canvas_pdev->dev);
put_device(&canvas_pdev->dev);
if (!canvas)
return ERR_PTR(-EINVAL);
}
return canvas;
}