tree b49428f1fd19f26c75ed3e2d6994ba72d3a3d190
parent 1a21175a615ed346e8043f5e9d60a672266b84b4
author Alan Stern <stern@rowland.harvard.edu> 1217347086 -0400
committer Greg Kroah-Hartman <gregkh@suse.de> 1218673970 -0700

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>