[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>
diff --git a/drivers/scsi/libata-eh.c b/drivers/scsi/libata-eh.c
index 70b6239..8233859 100644
--- a/drivers/scsi/libata-eh.c
+++ b/drivers/scsi/libata-eh.c
@@ -128,7 +128,7 @@
}
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 @@
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 @@
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 @@
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 @@
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 @@
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 @@
* 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 @@
/* 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 @@
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 @@
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 @@
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 @@
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 @@
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 @@
break;
}
- spin_unlock_irqrestore(&host_set->lock, flags);
+ spin_unlock_irqrestore(ap->lock, flags);
ata_eh_qc_complete(qc);
@@ -592,9 +591,9 @@
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 @@
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 @@
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 @@
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 @@
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 @@
{
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 @@
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);
}
}