From: Thomas Gleixner <tglx@kernel.org>
To: Liang Hao <haohlliang@gmail.com>
Cc: brgl@kernel.org, haohlliang@gmail.com,
hoan@os.amperecomputing.com, linusw@kernel.org,
linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4] gpio: dwapb: Mask interrupts at hardware initialization
Date: Sun, 05 Jul 2026 11:34:45 +0200 [thread overview]
Message-ID: <8733xxlqyy.ffs@fw13> (raw)
In-Reply-To: <20260705074759.47863-1-haohlliang@gmail.com>
On Sun, Jul 05 2026 at 15:47, Liang Hao wrote:
> GPIO interrupts may retain stale state across warm reboots when
> peripherals remain powered. If a GPIO line is not explicitly
> configured for interrupts, this can result in interrupt storms
> due to missing handlers.
>
> Fix this by ensuring all interrupts are masked and disabled at
> hardware initialization time via the init_hw() callback. Pending
> interrupts are also cleared to start from a known-safe state.
>
> Interrupts will be unmasked only when explicitly configured by
> userspace or kernel drivers.
That makes way more sense. :)
next prev parent reply other threads:[~2026-07-05 9:34 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-03 13:48 [PATCH] gpio: dwapb: Add robust error handling in interrupt handler Liang Hao
2026-07-03 21:21 ` Linus Walleij
2026-07-03 21:40 ` Thomas Gleixner
2026-07-05 7:46 ` haohlliang
2026-07-05 7:47 ` [PATCH v4] gpio: dwapb: Mask interrupts at hardware initialization Liang Hao
2026-07-05 9:34 ` Thomas Gleixner [this message]
2026-07-07 12:32 ` Bartosz Golaszewski
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