6.6-stable review patch. If anyone has any objections, please let me know.
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From: Johan Hovold johan@kernel.org
commit 32200f4828de9d7e6db379909898e718747f4e18 upstream.
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 28f851e6afa8 ("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: d4983983d987 ("soc: amlogic: add meson-canvas driver") Cc: stable@vger.kernel.org # 4.20: 28f851e6afa8 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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/soc/amlogic/meson-canvas.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
--- a/drivers/soc/amlogic/meson-canvas.c +++ b/drivers/soc/amlogic/meson-canvas.c @@ -73,10 +73,9 @@ struct meson_canvas *meson_canvas_get(st * 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; }