From: sashiko-bot@kernel.org
To: "Sasha Levin" <sashal@kernel.org>
Cc: linux-serial@vger.kernel.org
Subject: Re: [PATCH AUTOSEL 6.18-6.12] serial: 8250: force synchronous probe for the ISA and PNP drivers
Date: Mon, 19 Oct 2026 14:10:15 +0000 [thread overview]
Message-ID: <sashiko-outbox-177309@kernel.org> (raw)
In-Reply-To: <20261019135441.1420968-63-sashal@kernel.org>
> From: Rahul Bukte <rahul.bukte@sony.com>
>
> [ Upstream commit 31e11af34e2c7cc61e25533ab877b1f9cc3eb528 ]
>
> On x86_64 defconfig, booting with driver_async_probe=serial hangs in early
> init. The 8250 PNP driver is put onto the async probe pool.
> serial8250_register_8250_port() runs in a kworker concurrently with the
> ISA registration done from the serial8250_init() initcall resulting in a
> deadlock or NULL dereference.
>
> - Deadlock: serial_core_register_port() holds port_mutex across
> serial_core_add_one_port()
> uart_configure_port()
> autoconfig_irq()
> probe_irq_on()
> [ ... ]
>
> Signed-off-by: Rahul Bukte <rahul.bukte@sony.com>
> Link: https://patch.msgid.link/20260610054130.2825182-1-rahul.bukte@sony.com
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Signed-off-by: Sasha Levin <sashal@kernel.org>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261019135441.1420968-63-sashal@kernel.org?part=1
next prev parent reply other threads:[~2026-10-19 14:10 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20261019135441.1420968-1-sashal@kernel.org>
2026-10-19 13:45 ` [PATCH AUTOSEL 6.18-5.10] tty: serial: pch_uart: add check for pci_get_slot() Sasha Levin
2026-10-19 14:06 ` sashiko-bot
2026-10-19 13:45 ` [PATCH AUTOSEL 6.18-6.12] serial: 8250: force synchronous probe for the ISA and PNP drivers Sasha Levin
2026-10-19 14:10 ` sashiko-bot [this message]
2026-10-19 13:53 ` [PATCH AUTOSEL 6.18-6.6] serial: qcom_geni: Disable closing_wait for console to prevent shutdown timeout Sasha Levin
2026-10-19 15:51 ` sashiko-bot
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