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Re: [linux-usb-devel] error -71 during loading pehci (ehci) usb driver




On Mon, 25 Jun 2007, maximus wrote:

> Hi dear usb driver developers!
> 
> First of all let me describe my hardware platform and software.
> 
> I've got hardware platform based on s3c2410 samsung arm cpu, isp1761 philips 
> usb hi speed chip, au6368 card reader chip.
> I use linux kernel 2.6.19 and pehci usb driver ported to this kernel.
> 
> During booting my kernel - during loading pehci.ko driver, sometimes (1 time 
> of 20) an error appears:
> 
> hub 1-1:1.0: 3 ports detected
> usb 1-1.1: new high speed USB device using isp1761 and address 3
> usb 1-1.1: device descriptor read/64, error -71
> usb 1-1.1: device descriptor read/64, error -71
> usb 1-1.1: new high speed USB device using isp1761 and address 4
> usb 1-1.1: device descriptor read/64, error -71
> usb 1-1.1: device descriptor read/64, error -71
> usb 1-1.1: new high speed USB device using isp1761 and address 5
> usb 1-1.1: device not accepting address 5, error -71
> usb 1-1.1: new high speed USB device using isp1761 and address 6
> usb 1-1.1: device not accepting address 6, error -71
> 
> And after that my card reader doesn't work.
> So, my question is, why this error appears and how can i solve it?

The message indicates a low-level communications error.  For example, 
there might be a loose cable connection or a bad impedance somewhere.

> Did 
> anybody test usb driver on philips isp1761?

I have no idea.

Alan Stern


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