Mike Christie 034668ac91 target: Fix max_unmap_lba_count calc overflow ...

commit ea263c7fad upstream.

max_discard_sectors only 32bits, and some non scsi backend
devices will set this to the max 0xffffffff, so we can end up
overflowing during the max_unmap_lba_count calculation.

This fixes a regression caused by my patch:

commit 8a9ebe717a
Author: Mike Christie <mchristi@redhat.com>
Date:   Mon Jan 18 14:09:27 2016 -0600

    target: Fix WRITE_SAME/DISCARD conversion to linux 512b sectors

which can result in extra discards being sent to due the overflow
causing max_unmap_lba_count to be smaller than what the backing
device can actually support.

Signed-off-by: Mike Christie <mchristi@redhat.com>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2016-08-20 11:53:22 +02:00

..

iscsi

target: Add TFO->abort_task for aborted task resources release

2016-03-09 15:33:28 -08:00

configfs_macros.h

doc: fix broken references

2011-09-27 18:08:04 +02:00

target_core_backend.h

target: Fix max_unmap_lba_count calc overflow

2016-08-20 11:53:22 +02:00

target_core_base.h

target: Fix remote-port TMR ABORT + se_cmd fabric stop

2016-03-09 15:33:28 -08:00

target_core_configfs.h

target: Remove TF_CIT_TMPL macro

2013-10-16 13:35:02 -07:00

target_core_fabric_configfs.h

target: Add se_portal_group->tpg_auth_group

2013-07-03 19:44:31 -07:00

target_core_fabric.h

target: Add TFO->abort_task for aborted task resources release

2016-03-09 15:33:28 -08:00