5.15-stable review patch. If anyone has any objections, please let me know.
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From: Johan Hovold johan@kernel.org
commit 620a8f131154250f6a64a07d049a4f235d6451a5 upstream.
Make sure to drop the references taken to the vtg devices by of_find_device_by_node() when looking up their driver data during component probe.
Note that holding a reference to a platform device does not prevent its driver data from going away so there is no point in keeping the reference after the lookup helper returns.
Fixes: cc6b741c6f63 ("drm: sti: remove useless fields from vtg structure") Cc: stable@vger.kernel.org # 4.16 Cc: Benjamin Gaignard benjamin.gaignard@collabora.com Signed-off-by: Johan Hovold johan@kernel.org Link: https://patch.msgid.link/20250922122012.27407-1-johan@kernel.org Signed-off-by: Raphael Gallais-Pou raphael.gallais-pou@foss.st.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/sti/sti_vtg.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/sti/sti_vtg.c +++ b/drivers/gpu/drm/sti/sti_vtg.c @@ -143,12 +143,17 @@ struct sti_vtg { struct sti_vtg *of_vtg_find(struct device_node *np) { struct platform_device *pdev; + struct sti_vtg *vtg;
pdev = of_find_device_by_node(np); if (!pdev) return NULL;
- return (struct sti_vtg *)platform_get_drvdata(pdev); + vtg = platform_get_drvdata(pdev); + + put_device(&pdev->dev); + + return vtg; }
static void vtg_reset(struct sti_vtg *vtg)