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 1260cbcffa608219fc9188a6cbe9c45a300ef8b5 upstream.
Make sure to drop the reference taken when looking up the genpool platform device in of_gen_pool_get() before returning the pool.
Note that holding a reference to a device does typically not prevent its devres managed resources from being released so there is no point in keeping the reference.
Link: https://lkml.kernel.org/r/20250924080207.18006-1-johan@kernel.org Fixes: 9375db07adea ("genalloc: add devres support, allow to find a managed pool by device") Signed-off-by: Johan Hovold johan@kernel.org Cc: Philipp Zabel p.zabel@pengutronix.de Cc: Vladimir Zapolskiy vz@mleia.com Cc: stable@vger.kernel.org [3.10+] Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- lib/genalloc.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
--- a/lib/genalloc.c +++ b/lib/genalloc.c @@ -899,8 +899,11 @@ struct gen_pool *of_gen_pool_get(struct if (!name) name = np_pool->name; } - if (pdev) + if (pdev) { pool = gen_pool_get(&pdev->dev, name); + put_device(&pdev->dev); + } + of_node_put(np_pool);
return pool;