target: move the dereference below the NULL test
Author: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
The dereference should be moved below the NULL test.
spatch with a semantic match is used to found this.
(http://coccinelle.lip6.fr/)
Signed-off-by: Wei Yongjun
Signed-off-by: Nicholas Bellinger
---
drivers/target/target_core_pr.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/target/target_core_pr.c b/drivers/target/target_core_pr.c
index 3f8aac3..8c323a9 100644
--- a/drivers/target/target_core_pr.c
+++ b/drivers/target/target_core_pr.c
@@ -197,10 +197,10 @@ int target_scsi2_reservation_release(struct se_cmd *cmd)
{
struct se_device *dev = cmd->se_dev;
struct se_session *sess = cmd->se_sess;
- struct se_portal_group *tpg = sess->se_tpg;
+ struct se_portal_group *tpg;
int ret = 0, rc;
- if (!sess || !tpg)
+ if (!sess || !sess->se_tpg)
goto out;
rc = target_check_scsi2_reservation_conflict(cmd);
if (rc == 1)
@@ -228,6 +228,7 @@ int target_scsi2_reservation_release(struct se_cmd *cmd)
dev->dev_res_bin_isid = 0;
dev->dev_flags &= ~DF_SPC2_RESERVATIONS_WITH_ISID;
}
+ tpg = sess->se_tpg;
pr_debug("SCSI-2 Released reservation for %s LUN: %u ->"
" MAPPED LUN: %u for %s\n", tpg->se_tpg_tfo->get_fabric_name(),
cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun,
@@ -245,7 +246,7 @@ int target_scsi2_reservation_reserve(struct se_cmd *cmd)
{
struct se_device *dev = cmd->se_dev;
struct se_session *sess = cmd->se_sess;
- struct se_portal_group *tpg = sess->se_tpg;
+ struct se_portal_group *tpg;
int ret = 0, rc;
if ((cmd->t_task_cdb[1] & 0x01) &&
@@ -260,7 +261,7 @@ int target_scsi2_reservation_reserve(struct se_cmd *cmd)
* This is currently the case for target_core_mod passthrough struct se_cmd
* ops
*/
- if (!sess || !tpg)
+ if (!sess || !sess->se_tpg)
goto out;
rc = target_check_scsi2_reservation_conflict(cmd);
if (rc == 1)
@@ -272,6 +273,7 @@ int target_scsi2_reservation_reserve(struct se_cmd *cmd)
}
ret = 0;
+ tpg = sess->se_tpg;
spin_lock(&dev->dev_reservation_lock);
if (dev->dev_reserved_node_acl &&
(dev->dev_reserved_node_acl != sess->se_node_acl)) { |
---
drivers/target/target_core_pr.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/target/target_core_pr.c b/drivers/target/target_core_pr.c
index 3f8aac3..8c323a9 100644
--- a/drivers/target/target_core_pr.c
+++ b/drivers/target/target_core_pr.c
@@ -197,10 +197,10 @@ int target_scsi2_reservation_release(struct se_cmd *cmd)
{
struct se_device *dev = cmd->se_dev;
struct se_session *sess = cmd->se_sess;
- struct se_portal_group *tpg = sess->se_tpg;
+ struct se_portal_group *tpg;
int ret = 0, rc;
- if (!sess || !tpg)
+ if (!sess || !sess->se_tpg)
goto out;
rc = target_check_scsi2_reservation_conflict(cmd);
if (rc == 1)
@@ -228,6 +228,7 @@ int target_scsi2_reservation_release(struct se_cmd *cmd)
dev->dev_res_bin_isid = 0;
dev->dev_flags &= ~DF_SPC2_RESERVATIONS_WITH_ISID;
}
+ tpg = sess->se_tpg;
pr_debug("SCSI-2 Released reservation for %s LUN: %u ->"
" MAPPED LUN: %u for %s\n", tpg->se_tpg_tfo->get_fabric_name(),
cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun,
@@ -245,7 +246,7 @@ int target_scsi2_reservation_reserve(struct se_cmd *cmd)
{
struct se_device *dev = cmd->se_dev;
struct se_session *sess = cmd->se_sess;
- struct se_portal_group *tpg = sess->se_tpg;
+ struct se_portal_group *tpg;
int ret = 0, rc;
if ((cmd->t_task_cdb[1] & 0x01) &&
@@ -260,7 +261,7 @@ int target_scsi2_reservation_reserve(struct se_cmd *cmd)
* This is currently the case for target_core_mod passthrough struct se_cmd
* ops
*/
- if (!sess || !tpg)
+ if (!sess || !sess->se_tpg)
goto out;
rc = target_check_scsi2_reservation_conflict(cmd);
if (rc == 1)
@@ -272,6 +273,7 @@ int target_scsi2_reservation_reserve(struct se_cmd *cmd)
}
ret = 0;
+ tpg = sess->se_tpg;
spin_lock(&dev->dev_reservation_lock);
if (dev->dev_reserved_node_acl &&
(dev->dev_reserved_node_acl != sess->se_node_acl)) {