[libata] Add host lock to struct ata_port

Prepare for changes required to support SATA devices
attached to SAS HBAs. For these devices we don't want to
use host_set at all, since libata will not be the owner
of struct scsi_host.

Signed-off-by: Brian King <brking@us.ibm.com>

(with slight merge modifications made by...)
Signed-off-by: Jeff Garzik <jeff@garzik.org>

5 files changed, 73 insertions, 73 deletions

diff --git a/drivers/scsi/libata-bmdma.c b/drivers/scsi/libata-bmdma.c
index 13fab97c840e..004e1a0d8b71 100644
--- a/drivers/scsi/libata-bmdma.c
+++ b/drivers/scsi/libata-bmdma.c
@@ -715,7 +715,6 @@ void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
                         ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
                         ata_postreset_fn_t postreset)
 {
-        struct ata_host_set *host_set = ap->host_set;
         struct ata_eh_context *ehc = &ap->eh_context;
         struct ata_queued_cmd *qc;
         unsigned long flags;
@@ -726,7 +725,7 @@ void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
                 qc = NULL;
 
         /* reset PIO HSM and stop DMA engine */
-        spin_lock_irqsave(&host_set->lock, flags);
+        spin_lock_irqsave(ap->lock, flags);
 
         ap->hsm_task_state = HSM_ST_IDLE;
 
@@ -755,7 +754,7 @@ void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
         ata_chk_status(ap);
         ap->ops->irq_clear(ap);
 
-        spin_unlock_irqrestore(&host_set->lock, flags);
+        spin_unlock_irqrestore(ap->lock, flags);
 
         if (thaw)
                 ata_eh_thaw_port(ap);
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 425ab1493fd3..24d340aeb518 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -933,9 +933,9 @@ void ata_port_flush_task(struct ata_port *ap)
 
         DPRINTK("ENTER\n");
 
-        spin_lock_irqsave(&ap->host_set->lock, flags);
+        spin_lock_irqsave(ap->lock, flags);
         ap->flags |= ATA_FLAG_FLUSH_PORT_TASK;
-        spin_unlock_irqrestore(&ap->host_set->lock, flags);
+        spin_unlock_irqrestore(ap->lock, flags);
 
         DPRINTK("flush #1\n");
         flush_workqueue(ata_wq);
@@ -950,9 +950,9 @@ void ata_port_flush_task(struct ata_port *ap)
                 flush_workqueue(ata_wq);
         }
 
-        spin_lock_irqsave(&ap->host_set->lock, flags);
+        spin_lock_irqsave(ap->lock, flags);
         ap->flags &= ~ATA_FLAG_FLUSH_PORT_TASK;
-        spin_unlock_irqrestore(&ap->host_set->lock, flags);
+        spin_unlock_irqrestore(ap->lock, flags);
 
         DPRINTK("EXIT\n");
 }
@@ -999,11 +999,11 @@ unsigned ata_exec_internal(struct ata_device *dev,
         unsigned int err_mask;
         int rc;
 
-        spin_lock_irqsave(&ap->host_set->lock, flags);
+        spin_lock_irqsave(ap->lock, flags);
 
         /* no internal command while frozen */
         if (ap->flags & ATA_FLAG_FROZEN) {
-                spin_unlock_irqrestore(&ap->host_set->lock, flags);
+                spin_unlock_irqrestore(ap->lock, flags);
                 return AC_ERR_SYSTEM;
         }
 
@@ -1052,14 +1052,14 @@ unsigned ata_exec_internal(struct ata_device *dev,
 
         ata_qc_issue(qc);
 
-        spin_unlock_irqrestore(&ap->host_set->lock, flags);
+        spin_unlock_irqrestore(ap->lock, flags);
 
         rc = wait_for_completion_timeout(&wait, ATA_TMOUT_INTERNAL);
 
         ata_port_flush_task(ap);
 
         if (!rc) {
-                spin_lock_irqsave(&ap->host_set->lock, flags);
+                spin_lock_irqsave(ap->lock, flags);
 
                 /* We're racing with irq here.  If we lose, the
                  * following test prevents us from completing the qc
@@ -1078,7 +1078,7 @@ unsigned ata_exec_internal(struct ata_device *dev,
                                        "qc timeout (cmd 0x%x)\n", command);
                 }
 
-                spin_unlock_irqrestore(&ap->host_set->lock, flags);
+                spin_unlock_irqrestore(ap->lock, flags);
         }
 
         /* do post_internal_cmd */
@@ -1092,7 +1092,7 @@ unsigned ata_exec_internal(struct ata_device *dev,
         }
 
         /* finish up */
-        spin_lock_irqsave(&ap->host_set->lock, flags);
+        spin_lock_irqsave(ap->lock, flags);
 
         *tf = qc->result_tf;
         err_mask = qc->err_mask;
@@ -1118,7 +1118,7 @@ unsigned ata_exec_internal(struct ata_device *dev,
                 ata_port_probe(ap);
         }
 
-        spin_unlock_irqrestore(&ap->host_set->lock, flags);
+        spin_unlock_irqrestore(ap->lock, flags);
 
         return err_mask;
 }
@@ -3912,7 +3912,7 @@ static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq)
 
         if (ap->ops->error_handler) {
                 if (in_wq) {
-                        spin_lock_irqsave(&ap->host_set->lock, flags);
+                        spin_lock_irqsave(ap->lock, flags);
 
                         /* EH might have kicked in while host_set lock
                          * is released.
@@ -3926,7 +3926,7 @@ static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq)
                                         ata_port_freeze(ap);
                         }
 
-                        spin_unlock_irqrestore(&ap->host_set->lock, flags);
+                        spin_unlock_irqrestore(ap->lock, flags);
                 } else {
                         if (likely(!(qc->err_mask & AC_ERR_HSM)))
                                 ata_qc_complete(qc);
@@ -3935,10 +3935,10 @@ static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq)
                 }
         } else {
                 if (in_wq) {
-                        spin_lock_irqsave(&ap->host_set->lock, flags);
+                        spin_lock_irqsave(ap->lock, flags);
                         ata_irq_on(ap);
                         ata_qc_complete(qc);
-                        spin_unlock_irqrestore(&ap->host_set->lock, flags);
+                        spin_unlock_irqrestore(ap->lock, flags);
                 } else
                         ata_qc_complete(qc);
         }
@@ -4018,7 +4018,7 @@ fsm_start:
                  * hsm_task_state is changed. Hence, the following locking.
                  */
                 if (in_wq)
-                        spin_lock_irqsave(&ap->host_set->lock, flags);
+                        spin_lock_irqsave(ap->lock, flags);
 
                 if (qc->tf.protocol == ATA_PROT_PIO) {
                         /* PIO data out protocol.
@@ -4037,7 +4037,7 @@ fsm_start:
                         atapi_send_cdb(ap, qc);
 
                 if (in_wq)
-                        spin_unlock_irqrestore(&ap->host_set->lock, flags);
+                        spin_unlock_irqrestore(ap->lock, flags);
 
                 /* if polling, ata_pio_task() handles the rest.
                  * otherwise, interrupt handler takes over from here.
@@ -5130,9 +5130,9 @@ void ata_dev_init(struct ata_device *dev)
          * requests which occur asynchronously.  Synchronize using
          * host_set lock.
          */
-        spin_lock_irqsave(&ap->host_set->lock, flags);
+        spin_lock_irqsave(ap->lock, flags);
         dev->flags &= ~ATA_DFLAG_INIT_MASK;
-        spin_unlock_irqrestore(&ap->host_set->lock, flags);
+        spin_unlock_irqrestore(ap->lock, flags);
 
         memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0,
                sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET);
@@ -5167,6 +5167,7 @@ static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host,
         host->unique_id = ata_unique_id++;
         host->max_cmd_len = 12;
 
+        ap->lock = &host_set->lock;
         ap->flags = ATA_FLAG_DISABLED;
         ap->id = host->unique_id;
         ap->host = host;
@@ -5388,7 +5389,7 @@ int ata_device_add(const struct ata_probe_ent *ent)
                         ata_port_probe(ap);
 
                         /* kick EH for boot probing */
-                        spin_lock_irqsave(&ap->host_set->lock, flags);
+                        spin_lock_irqsave(ap->lock, flags);
 
                         ap->eh_info.probe_mask = (1 << ATA_MAX_DEVICES) - 1;
                         ap->eh_info.action |= ATA_EH_SOFTRESET;
@@ -5396,7 +5397,7 @@ int ata_device_add(const struct ata_probe_ent *ent)
                         ap->flags |= ATA_FLAG_LOADING;
                         ata_port_schedule_eh(ap);
 
-                        spin_unlock_irqrestore(&ap->host_set->lock, flags);
+                        spin_unlock_irqrestore(ap->lock, flags);
 
                         /* wait for EH to finish */
                         ata_port_wait_eh(ap);
@@ -5460,29 +5461,29 @@ void ata_port_detach(struct ata_port *ap)
                 return;
 
         /* tell EH we're leaving & flush EH */
-        spin_lock_irqsave(&ap->host_set->lock, flags);
+        spin_lock_irqsave(ap->lock, flags);
         ap->flags |= ATA_FLAG_UNLOADING;
-        spin_unlock_irqrestore(&ap->host_set->lock, flags);
+        spin_unlock_irqrestore(ap->lock, flags);
 
         ata_port_wait_eh(ap);
 
         /* EH is now guaranteed to see UNLOADING, so no new device
          * will be attached.  Disable all existing devices.
          */
-        spin_lock_irqsave(&ap->host_set->lock, flags);
+        spin_lock_irqsave(ap->lock, flags);
 
         for (i = 0; i < ATA_MAX_DEVICES; i++)
                 ata_dev_disable(&ap->device[i]);
 
-        spin_unlock_irqrestore(&ap->host_set->lock, flags);
+        spin_unlock_irqrestore(ap->lock, flags);
 
         /* Final freeze & EH.  All in-flight commands are aborted.  EH
          * will be skipped and retrials will be terminated with bad
          * target.
          */
-        spin_lock_irqsave(&ap->host_set->lock, flags);
+        spin_lock_irqsave(ap->lock, flags);
         ata_port_freeze(ap);    /* won't be thawed */
-        spin_unlock_irqrestore(&ap->host_set->lock, flags);
+        spin_unlock_irqrestore(ap->lock, flags);
 
         ata_port_wait_eh(ap);
 
diff --git a/drivers/scsi/libata-eh.c b/drivers/scsi/libata-eh.c
index 70b623988a9f..823385981a7a 100644
--- a/drivers/scsi/libata-eh.c
+++ b/drivers/scsi/libata-eh.c
@@ -128,7 +128,7 @@ enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd)
         }
 
         ret = EH_HANDLED;
-        spin_lock_irqsave(&ap->host_set->lock, flags);
+        spin_lock_irqsave(ap->lock, flags);
         qc = ata_qc_from_tag(ap, ap->active_tag);
         if (qc) {
                 WARN_ON(qc->scsicmd != cmd);
@@ -136,7 +136,7 @@ enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd)
                 qc->err_mask |= AC_ERR_TIMEOUT;
                 ret = EH_NOT_HANDLED;
         }
-        spin_unlock_irqrestore(&ap->host_set->lock, flags);
+        spin_unlock_irqrestore(ap->lock, flags);
 
  out:
         DPRINTK("EXIT, ret=%d\n", ret);
@@ -158,7 +158,7 @@ enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd)
 void ata_scsi_error(struct Scsi_Host *host)
 {
         struct ata_port *ap = ata_shost_to_port(host);
-        spinlock_t *hs_lock = &ap->host_set->lock;
+        spinlock_t *ap_lock = ap->lock;
         int i, repeat_cnt = ATA_EH_MAX_REPEAT;
         unsigned long flags;
 
@@ -185,7 +185,7 @@ void ata_scsi_error(struct Scsi_Host *host)
                 struct scsi_cmnd *scmd, *tmp;
                 int nr_timedout = 0;
 
-                spin_lock_irqsave(hs_lock, flags);
+                spin_lock_irqsave(ap_lock, flags);
 
                 list_for_each_entry_safe(scmd, tmp, &host->eh_cmd_q, eh_entry) {
                         struct ata_queued_cmd *qc;
@@ -224,15 +224,15 @@ void ata_scsi_error(struct Scsi_Host *host)
                 if (nr_timedout)
                         __ata_port_freeze(ap);
 
-                spin_unlock_irqrestore(hs_lock, flags);
+                spin_unlock_irqrestore(ap_lock, flags);
         } else
-                spin_unlock_wait(hs_lock);
+                spin_unlock_wait(ap_lock);
 
  repeat:
         /* invoke error handler */
         if (ap->ops->error_handler) {
                 /* fetch & clear EH info */
-                spin_lock_irqsave(hs_lock, flags);
+                spin_lock_irqsave(ap_lock, flags);
 
                 memset(&ap->eh_context, 0, sizeof(ap->eh_context));
                 ap->eh_context.i = ap->eh_info;
@@ -241,7 +241,7 @@ void ata_scsi_error(struct Scsi_Host *host)
                 ap->flags |= ATA_FLAG_EH_IN_PROGRESS;
                 ap->flags &= ~ATA_FLAG_EH_PENDING;
 
-                spin_unlock_irqrestore(hs_lock, flags);
+                spin_unlock_irqrestore(ap_lock, flags);
 
                 /* invoke EH.  if unloading, just finish failed qcs */
                 if (!(ap->flags & ATA_FLAG_UNLOADING))
@@ -253,14 +253,14 @@ void ata_scsi_error(struct Scsi_Host *host)
                  * recovered the port but before this point.  Repeat
                  * EH in such case.
                  */
-                spin_lock_irqsave(hs_lock, flags);
+                spin_lock_irqsave(ap_lock, flags);
 
                 if (ap->flags & ATA_FLAG_EH_PENDING) {
                         if (--repeat_cnt) {
                                 ata_port_printk(ap, KERN_INFO,
                                         "EH pending after completion, "
                                         "repeating EH (cnt=%d)\n", repeat_cnt);
-                                spin_unlock_irqrestore(hs_lock, flags);
+                                spin_unlock_irqrestore(ap_lock, flags);
                                 goto repeat;
                         }
                         ata_port_printk(ap, KERN_ERR, "EH pending after %d "
@@ -270,14 +270,14 @@ void ata_scsi_error(struct Scsi_Host *host)
                 /* this run is complete, make sure EH info is clear */
                 memset(&ap->eh_info, 0, sizeof(ap->eh_info));
 
-                /* Clear host_eh_scheduled while holding hs_lock such
+                /* Clear host_eh_scheduled while holding ap_lock such
                  * that if exception occurs after this point but
                  * before EH completion, SCSI midlayer will
                  * re-initiate EH.
                  */
                 host->host_eh_scheduled = 0;
 
-                spin_unlock_irqrestore(hs_lock, flags);
+                spin_unlock_irqrestore(ap_lock, flags);
         } else {
                 WARN_ON(ata_qc_from_tag(ap, ap->active_tag) == NULL);
                 ap->ops->eng_timeout(ap);
@@ -289,7 +289,7 @@ void ata_scsi_error(struct Scsi_Host *host)
         scsi_eh_flush_done_q(&ap->eh_done_q);
 
         /* clean up */
-        spin_lock_irqsave(hs_lock, flags);
+        spin_lock_irqsave(ap_lock, flags);
 
         if (ap->flags & ATA_FLAG_LOADING) {
                 ap->flags &= ~ATA_FLAG_LOADING;
@@ -306,7 +306,7 @@ void ata_scsi_error(struct Scsi_Host *host)
         ap->flags &= ~ATA_FLAG_EH_IN_PROGRESS;
         wake_up_all(&ap->eh_wait_q);
 
-        spin_unlock_irqrestore(hs_lock, flags);
+        spin_unlock_irqrestore(ap_lock, flags);
 
         DPRINTK("EXIT\n");
 }
@@ -326,17 +326,17 @@ void ata_port_wait_eh(struct ata_port *ap)
         DEFINE_WAIT(wait);
 
  retry:
-        spin_lock_irqsave(&ap->host_set->lock, flags);
+        spin_lock_irqsave(ap->lock, flags);
 
         while (ap->flags & (ATA_FLAG_EH_PENDING | ATA_FLAG_EH_IN_PROGRESS)) {
                 prepare_to_wait(&ap->eh_wait_q, &wait, TASK_UNINTERRUPTIBLE);
-                spin_unlock_irqrestore(&ap->host_set->lock, flags);
+                spin_unlock_irqrestore(ap->lock, flags);
                 schedule();
-                spin_lock_irqsave(&ap->host_set->lock, flags);
+                spin_lock_irqsave(ap->lock, flags);
         }
         finish_wait(&ap->eh_wait_q, &wait);
 
-        spin_unlock_irqrestore(&ap->host_set->lock, flags);
+        spin_unlock_irqrestore(ap->lock, flags);
 
         /* make sure SCSI EH is complete */
         if (scsi_host_in_recovery(ap->host)) {
@@ -368,7 +368,6 @@ void ata_port_wait_eh(struct ata_port *ap)
 static void ata_qc_timeout(struct ata_queued_cmd *qc)
 {
         struct ata_port *ap = qc->ap;
-        struct ata_host_set *host_set = ap->host_set;
         u8 host_stat = 0, drv_stat;
         unsigned long flags;
 
@@ -376,7 +375,7 @@ static void ata_qc_timeout(struct ata_queued_cmd *qc)
 
         ap->hsm_task_state = HSM_ST_IDLE;
 
-        spin_lock_irqsave(&host_set->lock, flags);
+        spin_lock_irqsave(ap->lock, flags);
 
         switch (qc->tf.protocol) {
 
@@ -405,7 +404,7 @@ static void ata_qc_timeout(struct ata_queued_cmd *qc)
                 break;
         }
 
-        spin_unlock_irqrestore(&host_set->lock, flags);
+        spin_unlock_irqrestore(ap->lock, flags);
 
         ata_eh_qc_complete(qc);
 
@@ -592,9 +591,9 @@ void ata_eh_freeze_port(struct ata_port *ap)
         if (!ap->ops->error_handler)
                 return;
 
-        spin_lock_irqsave(&ap->host_set->lock, flags);
+        spin_lock_irqsave(ap->lock, flags);
         __ata_port_freeze(ap);
-        spin_unlock_irqrestore(&ap->host_set->lock, flags);
+        spin_unlock_irqrestore(ap->lock, flags);
 }
 
 /**
@@ -613,14 +612,14 @@ void ata_eh_thaw_port(struct ata_port *ap)
         if (!ap->ops->error_handler)
                 return;
 
-        spin_lock_irqsave(&ap->host_set->lock, flags);
+        spin_lock_irqsave(ap->lock, flags);
 
         ap->flags &= ~ATA_FLAG_FROZEN;
 
         if (ap->ops->thaw)
                 ap->ops->thaw(ap);
 
-        spin_unlock_irqrestore(&ap->host_set->lock, flags);
+        spin_unlock_irqrestore(ap->lock, flags);
 
         DPRINTK("ata%u port thawed\n", ap->id);
 }
@@ -636,11 +635,11 @@ static void __ata_eh_qc_complete(struct ata_queued_cmd *qc)
         struct scsi_cmnd *scmd = qc->scsicmd;
         unsigned long flags;
 
-        spin_lock_irqsave(&ap->host_set->lock, flags);
+        spin_lock_irqsave(ap->lock, flags);
         qc->scsidone = ata_eh_scsidone;
         __ata_qc_complete(qc);
         WARN_ON(ata_tag_valid(qc->tag));
-        spin_unlock_irqrestore(&ap->host_set->lock, flags);
+        spin_unlock_irqrestore(ap->lock, flags);
 
         scsi_eh_finish_cmd(scmd, &ap->eh_done_q);
 }
@@ -694,7 +693,7 @@ static void ata_eh_detach_dev(struct ata_device *dev)
 
         ata_dev_disable(dev);
 
-        spin_lock_irqsave(&ap->host_set->lock, flags);
+        spin_lock_irqsave(ap->lock, flags);
 
         dev->flags &= ~ATA_DFLAG_DETACH;
 
@@ -703,7 +702,7 @@ static void ata_eh_detach_dev(struct ata_device *dev)
                 ap->flags |= ATA_FLAG_SCSI_HOTPLUG;
         }
 
-        spin_unlock_irqrestore(&ap->host_set->lock, flags);
+        spin_unlock_irqrestore(ap->lock, flags);
 }
 
 static void ata_eh_clear_action(struct ata_device *dev,
@@ -749,10 +748,10 @@ static void ata_eh_about_to_do(struct ata_port *ap, struct ata_device *dev,
 {
         unsigned long flags;
 
-        spin_lock_irqsave(&ap->host_set->lock, flags);
+        spin_lock_irqsave(ap->lock, flags);
         ata_eh_clear_action(dev, &ap->eh_info, action);
         ap->flags |= ATA_FLAG_RECOVERED;
-        spin_unlock_irqrestore(&ap->host_set->lock, flags);
+        spin_unlock_irqrestore(ap->lock, flags);
 }
 
 /**
@@ -1625,9 +1624,9 @@ static int ata_eh_revalidate_and_attach(struct ata_port *ap,
                                 break;
                         }
 
-                        spin_lock_irqsave(&ap->host_set->lock, flags);
+                        spin_lock_irqsave(ap->lock, flags);
                         ap->flags |= ATA_FLAG_SCSI_HOTPLUG;
-                        spin_unlock_irqrestore(&ap->host_set->lock, flags);
+                        spin_unlock_irqrestore(ap->lock, flags);
                 }
         }
 
diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c
index 9698949fa52a..d86abed62007 100644
--- a/drivers/scsi/libata-scsi.c
+++ b/drivers/scsi/libata-scsi.c
@@ -752,7 +752,7 @@ void ata_scsi_slave_destroy(struct scsi_device *sdev)
         if (!ap->ops->error_handler)
                 return;
 
-        spin_lock_irqsave(&ap->host_set->lock, flags);
+        spin_lock_irqsave(ap->lock, flags);
         dev = __ata_scsi_find_dev(ap, sdev);
         if (dev && dev->sdev) {
                 /* SCSI device already in CANCEL state, no need to offline it */
@@ -760,7 +760,7 @@ void ata_scsi_slave_destroy(struct scsi_device *sdev)
                 dev->flags |= ATA_DFLAG_DETACH;
                 ata_port_schedule_eh(ap);
         }
-        spin_unlock_irqrestore(&ap->host_set->lock, flags);
+        spin_unlock_irqrestore(ap->lock, flags);
 }
 
 /**
@@ -2684,7 +2684,7 @@ int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
         ap = ata_shost_to_port(shost);
 
         spin_unlock(shost->host_lock);
-        spin_lock(&ap->host_set->lock);
+        spin_lock(ap->lock);
 
         ata_scsi_dump_cdb(ap, cmd);
 
@@ -2696,7 +2696,7 @@ int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
                 done(cmd);
         }
 
-        spin_unlock(&ap->host_set->lock);
+        spin_unlock(ap->lock);
         spin_lock(shost->host_lock);
         return rc;
 }
@@ -2858,7 +2858,7 @@ static void ata_scsi_remove_dev(struct ata_device *dev)
          * increments reference counts regardless of device state.
          */
         mutex_lock(&ap->host->scan_mutex);
-        spin_lock_irqsave(&ap->host_set->lock, flags);
+        spin_lock_irqsave(ap->lock, flags);
 
         /* clearing dev->sdev is protected by host_set lock */
         sdev = dev->sdev;
@@ -2882,7 +2882,7 @@ static void ata_scsi_remove_dev(struct ata_device *dev)
                 }
         }
 
-        spin_unlock_irqrestore(&ap->host_set->lock, flags);
+        spin_unlock_irqrestore(ap->lock, flags);
         mutex_unlock(&ap->host->scan_mutex);
 
         if (sdev) {
@@ -2926,9 +2926,9 @@ void ata_scsi_hotplug(void *data)
                 if (!(dev->flags & ATA_DFLAG_DETACHED))
                         continue;
 
-                spin_lock_irqsave(&ap->host_set->lock, flags);
+                spin_lock_irqsave(ap->lock, flags);
                 dev->flags &= ~ATA_DFLAG_DETACHED;
-                spin_unlock_irqrestore(&ap->host_set->lock, flags);
+                spin_unlock_irqrestore(ap->lock, flags);
 
                 ata_scsi_remove_dev(dev);
         }
@@ -2981,7 +2981,7 @@ static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
             (lun != SCAN_WILD_CARD && lun != 0))
                 return -EINVAL;
 
-        spin_lock_irqsave(&ap->host_set->lock, flags);
+        spin_lock_irqsave(ap->lock, flags);
 
         if (id == SCAN_WILD_CARD) {
                 ap->eh_info.probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
@@ -2999,7 +2999,7 @@ static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
         if (rc == 0)
                 ata_port_schedule_eh(ap);
 
-        spin_unlock_irqrestore(&ap->host_set->lock, flags);
+        spin_unlock_irqrestore(ap->lock, flags);
 
         return rc;
 }
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 6b3c3af2c75f..20b1cf527c60 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -483,6 +483,7 @@ struct ata_eh_context {
 struct ata_port {
         struct Scsi_Host        *host;  /* our co-allocated scsi host */
         const struct ata_port_operations *ops;
+        spinlock_t              *lock;
         unsigned long           flags;  /* ATA_FLAG_xxx */
         unsigned int            id;     /* unique id req'd by scsi midlyr */
         unsigned int            port_no; /* unique port #; from zero */