From: Willy Tarreau <firstname.lastname@example.org> To: Johan Hovold <email@example.com> Cc: firstname.lastname@example.org, email@example.com, "Paul Größel" <firstname.lastname@example.org>, email@example.com Subject: Re: [PATCH] Revert "USB: serial: ch341: fix character loss at high transfer rates" Date: Tue, 24 Aug 2021 14:32:32 +0200 [thread overview] Message-ID: <20210824123232.GA25435@1wt.eu> (raw) In-Reply-To: <firstname.lastname@example.org> On Tue, Aug 24, 2021 at 02:19:26PM +0200, Johan Hovold wrote: > This reverts commit 3c18e9baee0ef97510dcda78c82285f52626764b. > > These devices do not appear to send a zero-length packet when the > transfer size is a multiple of the bulk-endpoint max-packet size. This > means that incoming data may not be processed by the driver until a > short packet is received or the receive buffer is full. > > Revert back to using endpoint-sized receive buffers to avoid stalled > reads. Sorry for this, I didn't notice any issue here (aside for the chip working where it used not to). I have no idea what these zero-length packets correspond to, nor why they're affected by the transfer size. Do you have any idea what I should look for ? Because without that patch, the device is unusable for me :-/ Thanks! Willy
next prev parent reply other threads:[~2021-08-24 12:32 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-08-24 12:19 Johan Hovold 2021-08-24 12:32 ` Willy Tarreau [this message] 2021-08-24 13:25 ` Johan Hovold 2021-08-24 15:06 ` Willy Tarreau
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