target: Fix WRITE_SAME_[16,32] number of blocks=0 case
authorNicholas Bellinger <nab@linux-iscsi.org>
Sat, 7 May 2011 00:55:35 +0000 (17:55 -0700)
committerNicholas Bellinger <nab@linux-iscsi.org>
Fri, 22 Jul 2011 09:37:44 +0000 (09:37 +0000)
commitdd3a5ad8e0c8706659f02c4a72b8c87f6f7ab479
tree83e4bad30b9dcceb9f19632ffe5cf128609ad06e
parent1eb437a4ac1813f21424b8c9c39575fd61528a26
target: Fix WRITE_SAME_[16,32] number of blocks=0 case

This patch fixes the handling of WRITE_SAME_[16,32] emulation where a
WRITE_SAME_* CDB with number of blocks=0 was being rejected by SCSI
expected data transfer length overflow checking in target core.

It changes both CDB cases in transport_generic_cmd_sequencer() to use
dev->se_sub_dev->se_dev_attrib.block_size to match what sg_write_same
is sending us with --num=0.  It also fixes target_emulate_write_same()
to properly determine the num_blocks with --num=0 case to determine the
remaining range for dev->transport->do_discard().

Reported-by: Chris Greiveldinger <chris.greiveldinger@rnanetworks.com>
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
drivers/target/target_core_cdb.c
drivers/target/target_core_transport.c