From: AW <arne_woerner@yahoo.com>
To: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: acm/ttyACM0/cdc_acm does not deliver data
Date: Thu, 6 Oct 2011 12:19:48 -0700 (PDT) [thread overview]
Message-ID: <1317928788.76722.YahooMailNeo@web30301.mail.mud.yahoo.com> (raw)
Hi!
I made some USB devices using the CDC-ACM proposal...
They work fine with 2.6.38.8-35.fc15/amd64 and earlier.
But since 2.6.40-4.fc15/amd64 it doesnt work as before...
My device receives a byte and then echoes it...
Sometimes when the 65th byte is sent, a read(2) returns with 0...
When I close the device and open it again and send 1 byte, I receive the echo for the 65th byte...
(btw: after 65 bytes, the roles change: my self-tinkered device sends 65bytes and listens to the echoes...)
Funnily some 65-byte-sequences are always echoed as before, while some are not (I tried it at least 10 times; I think the "bad" sequences had a lot of zeroes...)...
On my headless Atom N270 I have 1 self-tinkered USB-ACM-device and 2 DVB-T USB sticks...
When I boot the 2.6.40 kernel it crashes after some minutes...
Can we change that somehow? *wag tail*
Is it safe to use 2.6.38.8-35 behind a NAT? (I mean: r there big security holes?)
PS: I reported it here https://bugzilla.redhat.com/show_bug.cgi?id=727610 , but fedora/redhat cant help me so much, because i m the only one who has that problem...
Thx.
Bye
Arne
next reply other threads:[~2011-10-06 19:25 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-06 19:19 AW [this message]
2011-10-06 19:41 ` Greg KH
2011-10-06 19:51 ` Josh Boyer
2011-10-07 8:40 AW
2011-10-07 8:44 ` acm/ttyACM0/cdc_acm does not deliver data AW
2011-10-08 23:00 AW
2011-11-22 6:50 AW
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