commit 7abbe7f3e4243e28a9169ee1b8d76f10a6f5d37c
author Nicholas Bellinger <nab@linux-iscsi.org> Wed Aug 10 18:41:14 2011 -0700
committer Nicholas Bellinger <nab@linux-iscsi.org> Mon Aug 22 19:26:25 2011 +0000
tree 7edb86180f5b093cbef210562af8712d2d98d7fa
parent 72f4ba1e32a1e5da31dcf14ea4b8985ae88a8bdb

target: Fix SYNCHRONIZE_CACHE zero LBA + range breakage

This patch fixes a SYNCHRONIZE_CACHE CDB handling bug with IBLOCK/FILEIO
backends where transport_cmd_get_valid_sectors() was incorrectly rejecting
a zero LBA + range CDB from being processed, and returning CHECK_CONDITION.

This includes changing transport_cmd_get_valid_sectors() to return '0' on
success and '-EINVAL' on failure (this makes more sense than sectors),
and to only check transport_cmd_get_valid_sectors() when a non zero LBA +
range SYNCHRONIZE_CACHE operation has been receieved for the non passthrough
case.

Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>