Cleanup error handling for power management of sd

[Oliver Neukum]

Errors happening while sd devices are going to sleep need
to interpreted for the generic layer. In particular errors
for unplugged devices and removed media must be ignored.
This hits mostly users of eSATA devices who unplug external
drives right before the system is supposed to go to sleep.
--
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html