From: Oliver Neukum <oneukum@suse.com>
To: Joakim Tjernlund <Joakim.Tjernlund@infinera.com>,
"linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>
Subject: Re: ttyACM: disabled by hub (EMI?), re-enabling... Causes garbage chars & disconnect
Date: Mon, 08 Jun 2020 17:40:57 +0200 [thread overview]
Message-ID: <1591630857.24937.5.camel@suse.com> (raw)
In-Reply-To: <914176111c9eee651f402b499bc5ec49ff634e00.camel@infinera.com>
Am Montag, den 08.06.2020, 11:39 +0000 schrieb Joakim Tjernlund:
> Most terminal programs I use tries to empty the read queue after open, just to avoid
> old garbage så I don't see a problem here. It it up to the terminal app.
> Maybe one could use O_DIRECT for this purpose ?
Well, we can throw away stuff received until some time in open(2).
But you can always have stuff in the buffer when open(2) returns.
User space needs to be ready to deal with stuff in the buffer.
Regards
Oliver
next prev parent reply other threads:[~2020-06-08 15:41 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-25 14:46 ttyACM: disabled by hub (EMI?), re-enabling... Causes garbage chars & disconnect Joakim Tjernlund
2020-05-25 15:02 ` Oliver Neukum
2020-05-25 15:15 ` Joakim Tjernlund
2020-05-25 16:49 ` Joakim Tjernlund
2020-05-26 8:47 ` Oliver Neukum
2020-05-26 8:59 ` Joakim Tjernlund
2020-05-26 10:14 ` Oliver Neukum
2020-05-26 16:46 ` Joakim Tjernlund
2020-05-26 17:19 ` Joakim Tjernlund
2020-05-27 8:38 ` Oliver Neukum
2020-05-27 9:40 ` Joakim Tjernlund
2020-05-27 10:12 ` Greg KH
2020-05-27 10:41 ` Oliver Neukum
2020-05-27 13:16 ` Joakim Tjernlund
2020-05-27 15:41 ` Joakim Tjernlund
2020-06-05 10:09 ` Joakim Tjernlund
2020-06-08 9:13 ` Oliver Neukum
2020-06-08 11:39 ` Joakim Tjernlund
2020-06-08 15:40 ` Oliver Neukum [this message]
2020-06-08 16:00 ` Joakim Tjernlund
2020-06-08 19:21 ` Oliver Neukum
2020-06-15 11:01 ` Joakim Tjernlund
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