linux-kernel - USB storage quirk

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Message-ID: <CADY4qd+d=_nYkFq86QyfcC8JxgK17F9foN3UZS-iLYKR=t2-BA@mail.gmail.com>
Date:	Tue, 31 Jan 2012 20:44:18 +1000
From:	Russell Strong <russell@...ong.id.au>
To:	mdharm-usb@...-eyed-alien.net
Cc:	linux-kernel@...r.kernel.org
Subject: USB storage quirk

Hi Matthew,

I pulled you name from the kernel maintainers file to let someone know
about a quirk that I discovered with an MP3 player that connects as
usb-storage.  Hope I've got this right.

When I connected it to my fedora 8/14/16 machine ( sorry not the
latest kernel ) it didn't work.  The following is the dmesg output:

[ 1703.287204] usb 2-1: new high speed USB device using ehci_hcd and address 4
[ 1703.402018] usb 2-1: New USB device found, idVendor=1e74, idProduct=4641
[ 1703.402025] usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 1703.402030] usb 2-1: Product: USB
[ 1703.402034] usb 2-1: Manufacturer:
[ 1703.402037] usb 2-1: SerialNumber: USBV1.00
[ 1703.402840] scsi5 : usb-storage 2-1:1.0
[ 1704.403915] scsi 5:0:0:0: Direct-Access              USB DISK
  1.00 PQ: 0 ANSI: 0
[ 1704.409525] sd 5:0:0:0: Attached scsi generic sg3 type 0
[ 1704.411604] sd 5:0:0:0: [sdc] 15958016 512-byte logical blocks:
(8.17 GB/7.60 GiB)
[ 1704.514300] usb 2-1: reset high speed USB device using ehci_hcd and address 4
[ 1709.628307] usb 2-1: device descriptor read/all, error -110
[ 1709.730154] usb 2-1: reset high speed USB device using ehci_hcd and address 4
....

So I played around with the usb-storage parameter quirks, and found
that 1e74:4641:rw worked a treat.  Hope this is helpful.

For all the others googling for this :
Dick Smith Electronics MP3 player 8GB
DSE
A8705
add kernel command line parameter usb-storage.quirks=1e74:4641:rw

Regards,
Russell
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