From: sashiko-bot@kernel.org
To: "Zhu Jun" <zhujun2@cmss.chinamobile.com>
Cc: linux-serial@vger.kernel.org
Subject: Re: [PATCH] serial: 8250: Lock saved status flag resets during startup
Date: Wed, 11 Nov 2026 08:49:52 +0000 [thread overview]
Message-ID: <sashiko-outbox-208635@kernel.org> (raw)
In-Reply-To: <20261111084125.80910-1-zhujun2@cmss.chinamobile.com>
> serial8250_do_startup() clears lsr_saved_flags and msr_saved_flags after
> installing the IRQ handler and starting the port timer. An interrupt or
> console write can access these flags concurrently under the port lock,
> as reported by KCSAN.
>
> Hold the port lock while clearing the interrupt registers and resetting
> the saved flags, so the reset is serialized with their other users.
>
> Fixes: ad4c2aa6354f ("Serial 8250: handle saving the clear-on-read bits from the LSR and MSR")
> Signed-off-by: Zhu Jun <zhujun2@cmss.chinamobile.com>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261111084125.80910-1-zhujun2@cmss.chinamobile.com?part=1
prev parent reply other threads:[~2026-11-11 8:49 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-11 8:41 [PATCH] serial: 8250: Lock saved status flag resets during startup Zhu Jun
2026-11-11 8:49 ` sashiko-bot [this message]
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