usb/110988: [umass] [patch] Handling of quirk IGNORE_RESIDUE is umass.c is broken

[Arthur Hartwig]

The following reply was made to PR usb/110988; it has been noted by GNATS.

From: Arthur Hartwig <a_hartwig at fastmail.fm>
To: bug-followup at FreeBSD.org,  freebsdusb at bindone.de
Cc:  
Subject: Re: usb/110988: [umass] [patch] Handling of quirk IGNORE_RESIDUE
 is umass.c is broken
Date: Fri, 01 Aug 2008 23:45:32 +1000

 Concerning the report that some ICY BOX IB-220U-Wh units display the 
 problem described here and in PR 110991 and some don't I'll recount my 
 experience.
 
 I recently bought 6 "no name" USB adapters for notebook IDE hard drives. 
 Four of the adapters are silver in colour and came from the same 
 supplier. The two other adapters (one red and one blue) came from a 
 different supplier. Apart from the colour all adapters look the same on 
 the outside. Inside there are small differences in the printed circuit 
 board and the indicator LED. However the adapters behave quite 
 differently. On both FreeBSD 6.3 and 7.0 the silver adapters all 
 successfully  dd a few blocks from the start of the disk but the other 
 two adapters exit from the dd command reporting 0 blocks copied. 
 Examination of the reports from usbdevs shows the silver adapters report 
 use of a Initio chipset (Vendor=0x13fd, Product=0x1040) whereas the 
 adapters which don't work report the Super Top chipset (Vendor=0x14cd, 
 product=0x6600).
 
 Both sets of adapters work in Windows XP and Linux 2.6.24
 
 Perhaps the Icy Box can contain one of a number different chipsets with 
 the variant in behaviour dependent on the chipset used.
 
 I also have some USB adapters for SATA notebook drives. These use a 
 JMicron chipset and work with FreeBSD 7.0.
 
 I would be happy to test a patch for FreeBSD 7.0 to make the Super Top 
 based adapters work and verify that it doesn't break support for the 
 other two adapters I have.