From: Alan Stern <stern@rowland.harvard.edu>
Date: Tue, 29 Jul 2008 15:58:06 +0000 (-0400)
Subject: usb-storage: automatically recognize bad residues
X-Git-Tag: v2.6.27-rc4~101^2~35
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=59f4ff2ecff4cef36378928cec891785b402e80c;p=pandora-kernel.git

usb-storage: automatically recognize bad residues

This patch (as1119) will help to reduce the clutter of usb-storage's
unusual_devs file by automatically detecting some devices that need
the IGNORE_RESIDUE flag.  The idea is that devices should never return
a non-zero residue for an INQUIRY or a READ CAPACITY command unless
they failed to transfer all the requested data.  So if one of these
commands transfers a standard amount of data but there is a positive
residue, we know that the residue is bogus and we can set the flag.

This fixes the problems reported in Bugzilla #11125.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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