| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Wed, 3 Mar 2010 15:50:46 +0100 From: Johan Hovold <jhovold@...il.com> To: Alan Cox <alan@...rguk.ukuu.org.uk> Cc: Greg KH <greg@...ah.com>, Peter Feuerer <peter@...e.net>, linux-kernel@...r.kernel.org Subject: Re: [BUG] usb-serial / pl2302 corrupted receive On Wed, Mar 03, 2010 at 12:14:41PM +0000, Alan Cox wrote: > > > Terminal1: > > > cat /dev/ttyUSB1 > > > > > > Terminal2: > > > while true; do echo 123456789012345678901234567890 > /dev/ttyUSB0 ; done > > > > cat and echo are known to not work well with usb to serial devices. Can > > you duplicate this with a "real" tty program like minicom or something > > else? > > That should no longer be the case. The kfifo buffering implementation > fixed all the broken internal buffering in the usb tty code - or should > have done. Actually, the per-bulk-out-point allocated kfifo is currently unsused for most drivers, including the pl2303. I'm responding to this mail with a patch (against 2.6.33) which replaces the custom fifo-based write implementation in pl2303 with the generic kfifo based one. I've used it for quite a while now without any problems (just haven't got around to submitting it). If Alan's correct, this might solve the echo/cat issue, but either way it should be applied at some point as it removes a lot of duplicate code. /Johan -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists