From: sashiko-bot@kernel.org
To: "James Hilliard" <james.hilliard1@gmail.com>
Cc: linux-serial@vger.kernel.org
Subject: Re: [PATCH] serial: 8250: account for partial receive DMA delivery to TTY
Date: Wed, 21 Oct 2026 22:13:25 +0000 [thread overview]
Message-ID: <sashiko-outbox-180719@kernel.org> (raw)
In-Reply-To: <20261021-submit-serial-8250-dma-rx-accounting-v1-v1-1-c11795914ab4@gmail.com>
> tty_insert_flip_string() can accept fewer bytes than requested when the
> flip buffer cannot grow. The DMA receive path advances past the entire
> range regardless, but does not record that some bytes were dropped.
>
> Increment buf_overrun on a short insertion, as the PIO receive path
> does for a failed character insertion. Keep rx accounting for bytes
> received from hardware and do not retry data after the DMA buffer has
> been released.
>
> Fixes: 9ee4b83e51f7 ("serial: 8250: Add support for dmaengine")
> Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261021-submit-serial-8250-dma-rx-accounting-v1-v1-1-c11795914ab4@gmail.com?part=1
prev parent reply other threads:[~2026-10-21 22:13 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-21 22:09 [PATCH] serial: 8250: account for partial receive DMA delivery to TTY James Hilliard
2026-10-21 22:13 ` sashiko-bot [this message]
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