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target: Fix 16-bit target ports for SET TARGET PORT GROUPS emulation 

The old code did (MSB << 8) & 0xff, which always evaluates to 0.  Just use
get_unaligned_be16() so we don't have to worry about whether our open-coded
version is correct or not.

Signed-off-by: Roland Dreier <roland@purestorage.com>
Cc: stable@vger.kernel.org
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Roland Dreier 2012-02-23 17:22:12 -08:00 committed by Nicholas Bellinger
parent 355b769e03
commit 33395fb8a1
1 changed files with 3 additions and 4 deletions
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7
drivers/target/target_core_alua.c
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@ -30,6 +30,7 @@
#include <linux/export.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <asm/unaligned.h>
#include <target/target_core_base.h>
#include <target/target_core_backend.h>
@ -267,8 +268,7 @@ int target_emulate_set_target_port_groups(struct se_task *task)
* changed.
*/
if (primary) {
tg_pt_id = ((ptr[2] << 8) & 0xff);
tg_pt_id |= (ptr[3] & 0xff);
tg_pt_id = get_unaligned_be16(ptr + 2);
/*
* Locate the matching target port group ID from
* the global tg_pt_gp list
@ -312,8 +312,7 @@ int target_emulate_set_target_port_groups(struct se_task *task)
* the Target Port in question for the the incoming
* SET_TARGET_PORT_GROUPS op.
*/
rtpi = ((ptr[2] << 8) & 0xff);
rtpi |= (ptr[3] & 0xff);
rtpi = get_unaligned_be16(ptr + 2);
/*
* Locate the matching relative target port identifer
* for the struct se_device storage object.