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This patch is from Alan Stern (as560). It has been rediffed against a current tree. This patch allocates a separate buffer for usb-storage to use when auto-sensing. Up to now we have been using the sense buffer embedded in a scsi_cmnd struct, which is dangerous on hosts that (a) don't do cache-coherent DMA or (b) have DMA alignment restrictions. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Matthew Dharm <mdharm-usb@one-eyed-alien.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>