[lkml]   [2010]   [Nov]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: BUG, regression. usb-serial adapter broken by PM?
On Mon, Nov 29, 2010 at 08:52:14PM -0500, Benjamin Poirier wrote:
> Hello,
> Recently, my usb-serial converter has become unusable. Attempts to open
> the device always fail with:
> open("/dev/ttyUSB0", O_RDONLY) = -1 EAGAIN (Resource temporarily unavailable)
> The device is a:
> ID 0c52:2101 Sealevel Systems, Inc. Serial Converter
> and uses the ftdi_sio driver.
> I've bisected this problem to
> commit 1bfee5bc86fdaecc912e06080583eddab7263df2
> Author: Alan Stern <>
> Date: Sat Sep 25 23:35:00 2010 +0200
> PM / Runtime: Merge synchronous and async runtime routines
> I have other usb-serial converters that use other drivers and that are
> unaffected. I have noticed the problem on a x86_64 machine (.config
> here: and can reproduce it in kvm (with usb
> passthrough, .config here:
> I'll be glad to provide more info or try patches.

A patch to resolve this was sent to yesterday,
can you try that one out (sorry, can't dig it out at the moment...)


greg k-h

 \ /
  Last update: 2010-11-30 04:31    [W:0.028 / U:2.164 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site