Re: [PATCH v3 00/19] irqdomain: fix mapping race and clean up locking
From: Johan Hovold <johan@kernel.org>
Date: 2023-01-16 13:57:08
Also in:
linux-mips, lkml, platform-driver-x86
On Thu, Dec 15, 2022 at 05:31:24PM +0800, Hsin-Yi Wang wrote:
On Thu, Dec 15, 2022 at 5:22 PM Johan Hovold [off-list ref] wrote:quoted
Parallel probing (e.g. due to asynchronous probing) of devices that share interrupts can currently result in two mappings for the same hardware interrupt to be created. This series fixes this mapping race and clean up the irqdomain locking so that in the end the global irq_domain_mutex is only used for managing the likewise global irq_domain_list, while domain operations (e.g. IRQ allocations) use per-domain (hierarchy) locking.
Tested-by: Hsin-Yi Wang <redacted> The series solves a race issue when having non-populated 2nd source components that share the same irq on ARM devices: Previously we would see [ 0.476357] irq: type mismatch, failed to map hwirq-11 for pinctrl@10005000! and the component failed to probe.
Thanks again for testing. I just sent a v4 adding a couple of clarifying comments to the final patch. Johan _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel