From: Johan Hovold johan+linaro@kernel.org
[ Upstream commit 601363cc08da25747feb87c55573dd54de91d66a ]
Parallel probing of devices that share interrupts (e.g. when a driver uses asynchronous probing) can currently result in two mappings for the same hardware interrupt to be created due to missing serialisation.
Make sure to hold the irq_domain_mutex when creating mappings so that looking for an existing mapping before creating a new one is done atomically.
Fixes: 765230b5f084 ("driver-core: add asynchronous probing support for drivers") Fixes: b62b2cf5759b ("irqdomain: Fix handling of type settings for existing mappings") Link: https://lore.kernel.org/r/YuJXMHoT4ijUxnRb@hovoldconsulting.com Cc: stable@vger.kernel.org # 4.8 Cc: Dmitry Torokhov dtor@chromium.org Cc: Jon Hunter jonathanh@nvidia.com Tested-by: Hsin-Yi Wang hsinyi@chromium.org Tested-by: Mark-PK Tsai mark-pk.tsai@mediatek.com Signed-off-by: Johan Hovold johan+linaro@kernel.org Signed-off-by: Marc Zyngier maz@kernel.org Link: https://lore.kernel.org/r/20230213104302.17307-7-johan+linaro@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Mark-PK Tsai mark-pk.tsai@mediatek.com
5.4 also need this patch. Could someone please help to review it?
Thanks, Mark-PK Tsai