linux-kernel - Re: [PATCH v3] gpio: nuvoton: Fix sgpio irq handle error

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Date: Fri, 3 May 2024 18:30:12 +0200
From: Markus Elfring <Markus.Elfring@....de>
To: Jim Liu <JJLIU0@...oton.com>, openbmc@...ts.ozlabs.org,
 linux-gpio@...r.kernel.org, kernel-janitors@...r.kernel.org,
 Bartosz Golaszewski <brgl@...ev.pl>, Dan Carpenter
 <dan.carpenter@...aro.org>, Linus Walleij <linus.walleij@...aro.org>
Cc: LKML <linux-kernel@...r.kernel.org>, Jim Liu <jim.t90615@...il.com>,
 KWLIU@...oton.com
Subject: Re: [PATCH v3] gpio: nuvoton: Fix sgpio irq handle error

> The generic_handle_domain_irq() function calls irq_resolve_mapping()
> so calling irq_find_mapping() is duplicative and will lead to a stack
> trace and an RCU stall.

Can a wording approach (like the following) be a bit nicer?

   The generic_handle_domain_irq() function calls irq_resolve_mapping().
   Thus delete a duplicative irq_find_mapping() call
   so that a stack trace and an RCU stall will be avoided.


Regards,
Markus