From: sashiko-bot@kernel.org
To: "Fabrice Gasnier" <fabrice.gasnier@foss.st.com>
Cc: linux-usb@vger.kernel.org
Subject: Re: [PATCH] usb: dwc2: wa for isoc packet tx fifo flush at periodic frame boundary
Date: Wed, 14 Oct 2026 09:52:41 +0000 [thread overview]
Message-ID: <sashiko-outbox-171098@kernel.org> (raw)
In-Reply-To: <20261014-dwc2-fix-wa-isoc-v1-1-f261ce0852bd@foss.st.com>
> If an isochronous packet is still being transmitted, when the end of
> periodic frame interval elapses, using dma desc on dwc2 controller,
> the device wrongly flushes the pending packets from the tx fifo.
> This can lead to a huge packet is sent on the bus, leading to the host
> finally reset the bus, and re-enumerate it.
>
> Workaround it by tuning the periodic frame interval limit from 80% to 95%,
> on the affected cores (2.70a to 4.00a). It makes the issue very unlikely
> to occur.
>
> Signed-off-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261014-dwc2-fix-wa-isoc-v1-1-f261ce0852bd@foss.st.com?part=1
prev parent reply other threads:[~2026-10-14 9:52 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-14 9:46 [PATCH] usb: dwc2: wa for isoc packet tx fifo flush at periodic frame boundary Fabrice Gasnier
2026-10-14 9:52 ` sashiko-bot [this message]
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