[PATCH v3 8/8] scsi: add Scsi_Host argument to scsi_target_block()

mwilck
2023-06-07T18:24:14Z

From: Martin Wilck <mwilck@suse.com>

Instead of deriving the Scsi_Host from dev_to_shost, require
callers to pass in the Scsi_Host the given device belongs to.

Suggested-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin Wilck <mwilck@suse.com>
Cc: Karan Tilak Kumar <kartilak@cisco.com>
Cc: Sesidhar Baddela <sebaddel@cisco.com>
---
drivers/scsi/scsi_lib.c | 5 ++---
drivers/scsi/scsi_transport_fc.c | 2 +-
drivers/scsi/scsi_transport_iscsi.c | 3 ++-
drivers/scsi/scsi_transport_srp.c | 4 ++--
drivers/scsi/snic/snic_disc.c | 2 +-
include/scsi/scsi_device.h | 2 +-
6 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index e572fc56a8dd..b89d69a5bab0 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -2887,6 +2887,7 @@ target_block(struct device *dev, void *data)
/**
* scsi_target_block - transition all SCSI child devices to SDEV_BLOCK state
* @dev: a parent device of one or more scsi_target devices
+ * @shost: the Scsi_Host to which this device belongs
*
* Iterate over all children of @dev, which should be scsi_target devices,
* and switch all subordinate scsi devices to SDEV_BLOCK state. Wait for
@@ -2898,10 +2899,8 @@ target_block(struct device *dev, void *data)
* @dev must not itself be a scsi_target device.
*/
void
-scsi_target_block(struct device *dev)
+scsi_target_block(struct device *dev, struct Scsi_Host *shost)
{
- struct Scsi_Host *shost = dev_to_shost(dev);
-
device_for_each_child(dev, NULL, target_block);
blk_mq_wait_quiesce_done(&shost->tag_set);
}
diff --git a/drivers/scsi/scsi_transport_fc.c b/drivers/scsi/scsi_transport_fc.c
index 64ff2629eaf9..3155565e66f1 100644
--- a/drivers/scsi/scsi_transport_fc.c
+++ b/drivers/scsi/scsi_transport_fc.c
@@ -3451,7 +3451,7 @@ fc_remote_port_delete(struct fc_rport *rport)

spin_unlock_irqrestore(shost->host_lock, flags);

- scsi_target_block(&rport->dev);
+ scsi_target_block(&rport->dev, shost);

/* see if we need to kill io faster than waiting for device loss */
if ((rport->fast_io_fail_tmo != -1) &&
diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
index b9b97300e3b3..9f2f4c9403de 100644
--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -1943,13 +1943,14 @@ static void __iscsi_block_session(struct work_struct *work)
struct iscsi_cls_session *session =
container_of(work, struct iscsi_cls_session,
block_work);
+ struct Scsi_Host *shost = iscsi_session_to_shost(session);
unsigned long flags;

ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n");
spin_lock_irqsave(&session->lock, flags);
session->state = ISCSI_SESSION_FAILED;
spin_unlock_irqrestore(&session->lock, flags);
- scsi_target_block(&session->dev);
+ scsi_target_block(&session->dev, shost);
ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n");
if (session->recovery_tmo >= 0)
queue_delayed_work(session->workq,
diff --git a/drivers/scsi/scsi_transport_srp.c b/drivers/scsi/scsi_transport_srp.c
index 87d0fb8dc503..8219180a7b58 100644
--- a/drivers/scsi/scsi_transport_srp.c
+++ b/drivers/scsi/scsi_transport_srp.c
@@ -480,7 +480,7 @@ static void __srp_start_tl_fail_timers(struct srp_rport *rport)
srp_rport_set_state(rport, SRP_RPORT_BLOCKED) == 0) {
pr_debug("%s new state: %d\n", dev_name(&shost->shost_gendev),
rport->state);
- scsi_target_block(&shost->shost_gendev);
+ scsi_target_block(&shost->shost_gendev, shost);
if (fast_io_fail_tmo >= 0)
queue_delayed_work(system_long_wq,
&rport->fast_io_fail_work,
@@ -548,7 +548,7 @@ int srp_reconnect_rport(struct srp_rport *rport)
* later is ok though, scsi_internal_device_unblock_nowait()
* treats SDEV_TRANSPORT_OFFLINE like SDEV_BLOCK.
*/
- scsi_target_block(&shost->shost_gendev);
+ scsi_target_block(&shost->shost_gendev, shost);
res = rport->state != SRP_RPORT_LOST ? i->f->reconnect(rport) : -ENODEV;
pr_debug("%s (state %d): transport.reconnect() returned %d\n",
dev_name(&shost->shost_gendev), rport->state, res);
diff --git a/drivers/scsi/snic/snic_disc.c b/drivers/scsi/snic/snic_disc.c
index 8fbf3c1b1311..3749853439ac 100644
--- a/drivers/scsi/snic/snic_disc.c
+++ b/drivers/scsi/snic/snic_disc.c
@@ -214,7 +214,7 @@ snic_tgt_del(struct work_struct *work)
scsi_flush_work(shost);

/* Block IOs on child devices, stops new IOs */
- scsi_target_block(&tgt->dev);
+ scsi_target_block(&tgt->dev, shost);

/* Cleanup IOs */
snic_tgt_scsi_abort_io(tgt);
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index b2cdb078b7bd..9fd76b71b533 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -456,7 +456,7 @@ extern void scsi_scan_target(struct device *parent, unsigned int channel,
unsigned int id, u64 lun,
enum scsi_scan_mode rescan);
extern void scsi_target_reap(struct scsi_target *);
-extern void scsi_target_block(struct device *);
+extern void scsi_target_block(struct device *, struct Scsi_Host *);
extern void scsi_target_unblock(struct device *, enum scsi_device_state);
extern void scsi_remove_target(struct device *);
extern const char *scsi_device_state_name(enum scsi_device_state);
--
2.40.1