Alan Stern 7aae51347b [SCSI] sd: don't fail if the device doesn't recognize SYNCHRONIZE CACHE
Evidently some wacky USB-ATA bridges don't recognize the SYNCHRONIZE
CACHE command, as shown in this email thread:

	http://marc.info/?t=138978356200002&r=1&w=2

The fact that we can't tell them to drain their caches shouldn't
prevent the system from going into suspend.  Therefore sd_sync_cache()
shouldn't return an error if the device replies with an Invalid
Command ASC.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-by: Sven Neumann <s.neumann@raumfeld.com>
Tested-by: Daniel Mack <zonque@gmail.com>
CC: <stable@vger.kernel.org>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2014-03-15 10:19:22 -07:00
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