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path: root/drivers/scsi/libata-eh.c
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Diffstat (limited to 'drivers/scsi/libata-eh.c')
-rw-r--r--drivers/scsi/libata-eh.c464
1 files changed, 396 insertions, 68 deletions
diff --git a/drivers/scsi/libata-eh.c b/drivers/scsi/libata-eh.c
index bf5a72aca8a..29f59345305 100644
--- a/drivers/scsi/libata-eh.c
+++ b/drivers/scsi/libata-eh.c
@@ -47,6 +47,8 @@
static void __ata_port_freeze(struct ata_port *ap);
static void ata_eh_finish(struct ata_port *ap);
+static void ata_eh_handle_port_suspend(struct ata_port *ap);
+static void ata_eh_handle_port_resume(struct ata_port *ap);
static void ata_ering_record(struct ata_ering *ering, int is_io,
unsigned int err_mask)
@@ -190,7 +192,6 @@ 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 *ap_lock = ap->lock;
int i, repeat_cnt = ATA_EH_MAX_REPEAT;
unsigned long flags;
@@ -217,7 +218,7 @@ void ata_scsi_error(struct Scsi_Host *host)
struct scsi_cmnd *scmd, *tmp;
int nr_timedout = 0;
- spin_lock_irqsave(ap_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;
@@ -256,43 +257,49 @@ void ata_scsi_error(struct Scsi_Host *host)
if (nr_timedout)
__ata_port_freeze(ap);
- spin_unlock_irqrestore(ap_lock, flags);
+ spin_unlock_irqrestore(ap->lock, flags);
} else
- spin_unlock_wait(ap_lock);
+ spin_unlock_wait(ap->lock);
repeat:
/* invoke error handler */
if (ap->ops->error_handler) {
+ /* process port resume request */
+ ata_eh_handle_port_resume(ap);
+
/* fetch & clear EH info */
- spin_lock_irqsave(ap_lock, flags);
+ spin_lock_irqsave(ap->lock, flags);
memset(&ap->eh_context, 0, sizeof(ap->eh_context));
ap->eh_context.i = ap->eh_info;
memset(&ap->eh_info, 0, sizeof(ap->eh_info));
- ap->flags |= ATA_FLAG_EH_IN_PROGRESS;
- ap->flags &= ~ATA_FLAG_EH_PENDING;
+ ap->pflags |= ATA_PFLAG_EH_IN_PROGRESS;
+ ap->pflags &= ~ATA_PFLAG_EH_PENDING;
- spin_unlock_irqrestore(ap_lock, flags);
+ spin_unlock_irqrestore(ap->lock, flags);
- /* invoke EH. if unloading, just finish failed qcs */
- if (!(ap->flags & ATA_FLAG_UNLOADING))
+ /* invoke EH, skip if unloading or suspended */
+ if (!(ap->pflags & (ATA_PFLAG_UNLOADING | ATA_PFLAG_SUSPENDED)))
ap->ops->error_handler(ap);
else
ata_eh_finish(ap);
+ /* process port suspend request */
+ ata_eh_handle_port_suspend(ap);
+
/* Exception might have happend after ->error_handler
* recovered the port but before this point. Repeat
* EH in such case.
*/
- spin_lock_irqsave(ap_lock, flags);
+ spin_lock_irqsave(ap->lock, flags);
- if (ap->flags & ATA_FLAG_EH_PENDING) {
+ if (ap->pflags & ATA_PFLAG_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(ap_lock, flags);
+ spin_unlock_irqrestore(ap->lock, flags);
goto repeat;
}
ata_port_printk(ap, KERN_ERR, "EH pending after %d "
@@ -302,14 +309,14 @@ 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 ap_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(ap_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);
@@ -321,24 +328,23 @@ void ata_scsi_error(struct Scsi_Host *host)
scsi_eh_flush_done_q(&ap->eh_done_q);
/* clean up */
- spin_lock_irqsave(ap_lock, flags);
+ spin_lock_irqsave(ap->lock, flags);
- if (ap->flags & ATA_FLAG_LOADING) {
- ap->flags &= ~ATA_FLAG_LOADING;
- } else {
- if (ap->flags & ATA_FLAG_SCSI_HOTPLUG)
- queue_work(ata_aux_wq, &ap->hotplug_task);
- if (ap->flags & ATA_FLAG_RECOVERED)
- ata_port_printk(ap, KERN_INFO, "EH complete\n");
- }
+ if (ap->pflags & ATA_PFLAG_LOADING)
+ ap->pflags &= ~ATA_PFLAG_LOADING;
+ else if (ap->pflags & ATA_PFLAG_SCSI_HOTPLUG)
+ queue_work(ata_aux_wq, &ap->hotplug_task);
- ap->flags &= ~(ATA_FLAG_SCSI_HOTPLUG | ATA_FLAG_RECOVERED);
+ if (ap->pflags & ATA_PFLAG_RECOVERED)
+ ata_port_printk(ap, KERN_INFO, "EH complete\n");
+
+ ap->pflags &= ~(ATA_PFLAG_SCSI_HOTPLUG | ATA_PFLAG_RECOVERED);
/* tell wait_eh that we're done */
- ap->flags &= ~ATA_FLAG_EH_IN_PROGRESS;
+ ap->pflags &= ~ATA_PFLAG_EH_IN_PROGRESS;
wake_up_all(&ap->eh_wait_q);
- spin_unlock_irqrestore(ap_lock, flags);
+ spin_unlock_irqrestore(ap->lock, flags);
DPRINTK("EXIT\n");
}
@@ -360,7 +366,7 @@ void ata_port_wait_eh(struct ata_port *ap)
retry:
spin_lock_irqsave(ap->lock, flags);
- while (ap->flags & (ATA_FLAG_EH_PENDING | ATA_FLAG_EH_IN_PROGRESS)) {
+ while (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS)) {
prepare_to_wait(&ap->eh_wait_q, &wait, TASK_UNINTERRUPTIBLE);
spin_unlock_irqrestore(ap->lock, flags);
schedule();
@@ -489,7 +495,7 @@ void ata_qc_schedule_eh(struct ata_queued_cmd *qc)
WARN_ON(!ap->ops->error_handler);
qc->flags |= ATA_QCFLAG_FAILED;
- qc->ap->flags |= ATA_FLAG_EH_PENDING;
+ qc->ap->pflags |= ATA_PFLAG_EH_PENDING;
/* The following will fail if timeout has already expired.
* ata_scsi_error() takes care of such scmds on EH entry.
@@ -513,7 +519,7 @@ void ata_port_schedule_eh(struct ata_port *ap)
{
WARN_ON(!ap->ops->error_handler);
- ap->flags |= ATA_FLAG_EH_PENDING;
+ ap->pflags |= ATA_PFLAG_EH_PENDING;
scsi_schedule_eh(ap->host);
DPRINTK("port EH scheduled\n");
@@ -578,7 +584,7 @@ static void __ata_port_freeze(struct ata_port *ap)
if (ap->ops->freeze)
ap->ops->freeze(ap);
- ap->flags |= ATA_FLAG_FROZEN;
+ ap->pflags |= ATA_PFLAG_FROZEN;
DPRINTK("ata%u port frozen\n", ap->id);
}
@@ -646,7 +652,7 @@ void ata_eh_thaw_port(struct ata_port *ap)
spin_lock_irqsave(ap->lock, flags);
- ap->flags &= ~ATA_FLAG_FROZEN;
+ ap->pflags &= ~ATA_PFLAG_FROZEN;
if (ap->ops->thaw)
ap->ops->thaw(ap);
@@ -731,7 +737,7 @@ static void ata_eh_detach_dev(struct ata_device *dev)
if (ata_scsi_offline_dev(dev)) {
dev->flags |= ATA_DFLAG_DETACHED;
- ap->flags |= ATA_FLAG_SCSI_HOTPLUG;
+ ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG;
}
/* clear per-dev EH actions */
@@ -758,10 +764,29 @@ static void ata_eh_about_to_do(struct ata_port *ap, struct ata_device *dev,
unsigned int action)
{
unsigned long flags;
+ struct ata_eh_info *ehi = &ap->eh_info;
+ struct ata_eh_context *ehc = &ap->eh_context;
spin_lock_irqsave(ap->lock, flags);
- ata_eh_clear_action(dev, &ap->eh_info, action);
- ap->flags |= ATA_FLAG_RECOVERED;
+
+ /* Reset is represented by combination of actions and EHI
+ * flags. Suck in all related bits before clearing eh_info to
+ * avoid losing requested action.
+ */
+ if (action & ATA_EH_RESET_MASK) {
+ ehc->i.action |= ehi->action & ATA_EH_RESET_MASK;
+ ehc->i.flags |= ehi->flags & ATA_EHI_RESET_MODIFIER_MASK;
+
+ /* make sure all reset actions are cleared & clear EHI flags */
+ action |= ATA_EH_RESET_MASK;
+ ehi->flags &= ~ATA_EHI_RESET_MODIFIER_MASK;
+ }
+
+ ata_eh_clear_action(dev, ehi, action);
+
+ if (!(ehc->i.flags & ATA_EHI_QUIET))
+ ap->pflags |= ATA_PFLAG_RECOVERED;
+
spin_unlock_irqrestore(ap->lock, flags);
}
@@ -780,6 +805,12 @@ static void ata_eh_about_to_do(struct ata_port *ap, struct ata_device *dev,
static void ata_eh_done(struct ata_port *ap, struct ata_device *dev,
unsigned int action)
{
+ /* if reset is complete, clear all reset actions & reset modifier */
+ if (action & ATA_EH_RESET_MASK) {
+ action |= ATA_EH_RESET_MASK;
+ ap->eh_context.i.flags &= ~ATA_EHI_RESET_MODIFIER_MASK;
+ }
+
ata_eh_clear_action(dev, &ap->eh_context.i, action);
}
@@ -1027,7 +1058,7 @@ static void ata_eh_analyze_ncq_error(struct ata_port *ap)
int tag, rc;
/* if frozen, we can't do much */
- if (ap->flags & ATA_FLAG_FROZEN)
+ if (ap->pflags & ATA_PFLAG_FROZEN)
return;
/* is it NCQ device error? */
@@ -1266,8 +1297,6 @@ static int ata_eh_speed_down(struct ata_device *dev, int is_io,
static void ata_eh_autopsy(struct ata_port *ap)
{
struct ata_eh_context *ehc = &ap->eh_context;
- unsigned int action = ehc->i.action;
- struct ata_device *failed_dev = NULL;
unsigned int all_err_mask = 0;
int tag, is_io = 0;
u32 serror;
@@ -1275,13 +1304,16 @@ static void ata_eh_autopsy(struct ata_port *ap)
DPRINTK("ENTER\n");
+ if (ehc->i.flags & ATA_EHI_NO_AUTOPSY)
+ return;
+
/* obtain and analyze SError */
rc = sata_scr_read(ap, SCR_ERROR, &serror);
if (rc == 0) {
ehc->i.serror |= serror;
ata_eh_analyze_serror(ap);
} else if (rc != -EOPNOTSUPP)
- action |= ATA_EH_HARDRESET;
+ ehc->i.action |= ATA_EH_HARDRESET;
/* analyze NCQ failure */
ata_eh_analyze_ncq_error(ap);
@@ -1302,7 +1334,7 @@ static void ata_eh_autopsy(struct ata_port *ap)
qc->err_mask |= ehc->i.err_mask;
/* analyze TF */
- action |= ata_eh_analyze_tf(qc, &qc->result_tf);
+ ehc->i.action |= ata_eh_analyze_tf(qc, &qc->result_tf);
/* DEV errors are probably spurious in case of ATA_BUS error */
if (qc->err_mask & AC_ERR_ATA_BUS)
@@ -1316,38 +1348,35 @@ static void ata_eh_autopsy(struct ata_port *ap)
/* SENSE_VALID trumps dev/unknown error and revalidation */
if (qc->flags & ATA_QCFLAG_SENSE_VALID) {
qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_OTHER);
- action &= ~ATA_EH_REVALIDATE;
+ ehc->i.action &= ~ATA_EH_REVALIDATE;
}
/* accumulate error info */
- failed_dev = qc->dev;
+ ehc->i.dev = qc->dev;
all_err_mask |= qc->err_mask;
if (qc->flags & ATA_QCFLAG_IO)
is_io = 1;
}
/* enforce default EH actions */
- if (ap->flags & ATA_FLAG_FROZEN ||
+ if (ap->pflags & ATA_PFLAG_FROZEN ||
all_err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT))
- action |= ATA_EH_SOFTRESET;
+ ehc->i.action |= ATA_EH_SOFTRESET;
else if (all_err_mask)
- action |= ATA_EH_REVALIDATE;
+ ehc->i.action |= ATA_EH_REVALIDATE;
/* if we have offending qcs and the associated failed device */
- if (failed_dev) {
+ if (ehc->i.dev) {
/* speed down */
- action |= ata_eh_speed_down(failed_dev, is_io, all_err_mask);
+ ehc->i.action |= ata_eh_speed_down(ehc->i.dev, is_io,
+ all_err_mask);
/* perform per-dev EH action only on the offending device */
- ehc->i.dev_action[failed_dev->devno] |=
- action & ATA_EH_PERDEV_MASK;
- action &= ~ATA_EH_PERDEV_MASK;
+ ehc->i.dev_action[ehc->i.dev->devno] |=
+ ehc->i.action & ATA_EH_PERDEV_MASK;
+ ehc->i.action &= ~ATA_EH_PERDEV_MASK;
}
- /* record autopsy result */
- ehc->i.dev = failed_dev;
- ehc->i.action = action;
-
DPRINTK("EXIT\n");
}
@@ -1385,7 +1414,7 @@ static void ata_eh_report(struct ata_port *ap)
return;
frozen = "";
- if (ap->flags & ATA_FLAG_FROZEN)
+ if (ap->pflags & ATA_PFLAG_FROZEN)
frozen = " frozen";
if (ehc->i.dev) {
@@ -1465,11 +1494,14 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
struct ata_eh_context *ehc = &ap->eh_context;
unsigned int *classes = ehc->classes;
int tries = ATA_EH_RESET_TRIES;
- int verbose = !(ap->flags & ATA_FLAG_LOADING);
+ int verbose = !(ehc->i.flags & ATA_EHI_QUIET);
unsigned int action;
ata_reset_fn_t reset;
int i, did_followup_srst, rc;
+ /* about to reset */
+ ata_eh_about_to_do(ap, NULL, ehc->i.action & ATA_EH_RESET_MASK);
+
/* Determine which reset to use and record in ehc->i.action.
* prereset() may examine and modify it.
*/
@@ -1518,8 +1550,7 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
ata_port_printk(ap, KERN_INFO, "%s resetting port\n",
reset == softreset ? "soft" : "hard");
- /* reset */
- ata_eh_about_to_do(ap, NULL, ATA_EH_RESET_MASK);
+ /* mark that this EH session started with reset */
ehc->i.flags |= ATA_EHI_DID_RESET;
rc = ata_do_reset(ap, reset, classes);
@@ -1582,7 +1613,7 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
postreset(ap, classes);
/* reset successful, schedule revalidation */
- ata_eh_done(ap, NULL, ATA_EH_RESET_MASK);
+ ata_eh_done(ap, NULL, ehc->i.action & ATA_EH_RESET_MASK);
ehc->i.action |= ATA_EH_REVALIDATE;
}
@@ -1605,7 +1636,7 @@ static int ata_eh_revalidate_and_attach(struct ata_port *ap,
dev = &ap->device[i];
action = ata_eh_dev_action(dev);
- if (action & ATA_EH_REVALIDATE && ata_dev_enabled(dev)) {
+ if (action & ATA_EH_REVALIDATE && ata_dev_ready(dev)) {
if (ata_port_offline(ap)) {
rc = -EIO;
break;
@@ -1636,7 +1667,7 @@ static int ata_eh_revalidate_and_attach(struct ata_port *ap,
}
spin_lock_irqsave(ap->lock, flags);
- ap->flags |= ATA_FLAG_SCSI_HOTPLUG;
+ ap->pflags |= ATA_PFLAG_SCSI_HOTPLUG;
spin_unlock_irqrestore(ap->lock, flags);
}
}
@@ -1648,6 +1679,164 @@ static int ata_eh_revalidate_and_attach(struct ata_port *ap,
return rc;
}
+/**
+ * ata_eh_suspend - handle suspend EH action
+ * @ap: target host port
+ * @r_failed_dev: result parameter to indicate failing device
+ *
+ * Handle suspend EH action. Disk devices are spinned down and
+ * other types of devices are just marked suspended. Once
+ * suspended, no EH action to the device is allowed until it is
+ * resumed.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep).
+ *
+ * RETURNS:
+ * 0 on success, -errno otherwise
+ */
+static int ata_eh_suspend(struct ata_port *ap, struct ata_device **r_failed_dev)
+{
+ struct ata_device *dev;
+ int i, rc = 0;
+
+ DPRINTK("ENTER\n");
+
+ for (i = 0; i < ATA_MAX_DEVICES; i++) {
+ unsigned long flags;
+ unsigned int action, err_mask;
+
+ dev = &ap->device[i];
+ action = ata_eh_dev_action(dev);
+
+ if (!ata_dev_enabled(dev) || !(action & ATA_EH_SUSPEND))
+ continue;
+
+ WARN_ON(dev->flags & ATA_DFLAG_SUSPENDED);
+
+ ata_eh_about_to_do(ap, dev, ATA_EH_SUSPEND);
+
+ if (dev->class == ATA_DEV_ATA && !(action & ATA_EH_PM_FREEZE)) {
+ /* flush cache */
+ rc = ata_flush_cache(dev);
+ if (rc)
+ break;
+
+ /* spin down */
+ err_mask = ata_do_simple_cmd(dev, ATA_CMD_STANDBYNOW1);
+ if (err_mask) {
+ ata_dev_printk(dev, KERN_ERR, "failed to "
+ "spin down (err_mask=0x%x)\n",
+ err_mask);
+ rc = -EIO;
+ break;
+ }
+ }
+
+ spin_lock_irqsave(ap->lock, flags);
+ dev->flags |= ATA_DFLAG_SUSPENDED;
+ spin_unlock_irqrestore(ap->lock, flags);
+
+ ata_eh_done(ap, dev, ATA_EH_SUSPEND);
+ }
+
+ if (rc)
+ *r_failed_dev = dev;
+
+ DPRINTK("EXIT\n");
+ return 0;
+}
+
+/**
+ * ata_eh_prep_resume - prep for resume EH action
+ * @ap: target host port
+ *
+ * Clear SUSPENDED in preparation for scheduled resume actions.
+ * This allows other parts of EH to access the devices being
+ * resumed.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep).
+ */
+static void ata_eh_prep_resume(struct ata_port *ap)
+{
+ struct ata_device *dev;
+ unsigned long flags;
+ int i;
+
+ DPRINTK("ENTER\n");
+
+ for (i = 0; i < ATA_MAX_DEVICES; i++) {
+ unsigned int action;
+
+ dev = &ap->device[i];
+ action = ata_eh_dev_action(dev);
+
+ if (!ata_dev_enabled(dev) || !(action & ATA_EH_RESUME))
+ continue;
+
+ spin_lock_irqsave(ap->lock, flags);
+ dev->flags &= ~ATA_DFLAG_SUSPENDED;
+ spin_unlock_irqrestore(ap->lock, flags);
+ }
+
+ DPRINTK("EXIT\n");
+}
+
+/**
+ * ata_eh_resume - handle resume EH action
+ * @ap: target host port
+ * @r_failed_dev: result parameter to indicate failing device
+ *
+ * Handle resume EH action. Target devices are already reset and
+ * revalidated. Spinning up is the only operation left.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep).
+ *
+ * RETURNS:
+ * 0 on success, -errno otherwise
+ */
+static int ata_eh_resume(struct ata_port *ap, struct ata_device **r_failed_dev)
+{
+ struct ata_device *dev;
+ int i, rc = 0;
+
+ DPRINTK("ENTER\n");
+
+ for (i = 0; i < ATA_MAX_DEVICES; i++) {
+ unsigned int action, err_mask;
+
+ dev = &ap->device[i];
+ action = ata_eh_dev_action(dev);
+
+ if (!ata_dev_enabled(dev) || !(action & ATA_EH_RESUME))
+ continue;
+
+ ata_eh_about_to_do(ap, dev, ATA_EH_RESUME);
+
+ if (dev->class == ATA_DEV_ATA && !(action & ATA_EH_PM_FREEZE)) {
+ err_mask = ata_do_simple_cmd(dev,
+ ATA_CMD_IDLEIMMEDIATE);
+ if (err_mask) {
+ ata_dev_printk(dev, KERN_ERR, "failed to "
+ "spin up (err_mask=0x%x)\n",
+ err_mask);
+ rc = -EIO;
+ break;
+ }
+ }
+
+ ata_eh_done(ap, dev, ATA_EH_RESUME);
+ }
+
+ if (rc)
+ *r_failed_dev = dev;
+
+ DPRINTK("EXIT\n");
+ return 0;
+}
+
static int ata_port_nr_enabled(struct ata_port *ap)
{
int i, cnt = 0;
@@ -1673,7 +1862,20 @@ static int ata_eh_skip_recovery(struct ata_port *ap)
struct ata_eh_context *ehc = &ap->eh_context;
int i;
- if (ap->flags & ATA_FLAG_FROZEN || ata_port_nr_enabled(ap))
+ /* skip if all possible devices are suspended */
+ for (i = 0; i < ata_port_max_devices(ap); i++) {
+ struct ata_device *dev = &ap->device[i];
+
+ if (!(dev->flags & ATA_DFLAG_SUSPENDED))
+ break;
+ }
+
+ if (i == ata_port_max_devices(ap))
+ return 1;
+
+ /* thaw frozen port, resume link and recover failed devices */
+ if ((ap->pflags & ATA_PFLAG_FROZEN) ||
+ (ehc->i.flags & ATA_EHI_RESUME_LINK) || ata_port_nr_enabled(ap))
return 0;
/* skip if class codes for all vacant slots are ATA_DEV_NONE */
@@ -1744,9 +1946,12 @@ static int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
rc = 0;
/* if UNLOADING, finish immediately */
- if (ap->flags & ATA_FLAG_UNLOADING)
+ if (ap->pflags & ATA_PFLAG_UNLOADING)
goto out;
+ /* prep for resume */
+ ata_eh_prep_resume(ap);
+
/* skip EH if possible. */
if (ata_eh_skip_recovery(ap))
ehc->i.action = 0;
@@ -1774,6 +1979,11 @@ static int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
if (rc)
goto dev_fail;
+ /* resume devices */
+ rc = ata_eh_resume(ap, &dev);
+ if (rc)
+ goto dev_fail;
+
/* configure transfer mode if the port has been reset */
if (ehc->i.flags & ATA_EHI_DID_RESET) {
rc = ata_set_mode(ap, &dev);
@@ -1783,6 +1993,11 @@ static int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
}
}
+ /* suspend devices */
+ rc = ata_eh_suspend(ap, &dev);
+ if (rc)
+ goto dev_fail;
+
goto out;
dev_fail:
@@ -1908,11 +2123,124 @@ void ata_do_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)
{
- if (!(ap->flags & ATA_FLAG_LOADING)) {
- ata_eh_autopsy(ap);
- ata_eh_report(ap);
- }
-
+ ata_eh_autopsy(ap);
+ ata_eh_report(ap);
ata_eh_recover(ap, prereset, softreset, hardreset, postreset);
ata_eh_finish(ap);
}
+
+/**
+ * ata_eh_handle_port_suspend - perform port suspend operation
+ * @ap: port to suspend
+ *
+ * Suspend @ap.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep).
+ */
+static void ata_eh_handle_port_suspend(struct ata_port *ap)
+{
+ unsigned long flags;
+ int rc = 0;
+
+ /* are we suspending? */
+ spin_lock_irqsave(ap->lock, flags);
+ if (!(ap->pflags & ATA_PFLAG_PM_PENDING) ||
+ ap->pm_mesg.event == PM_EVENT_ON) {
+ spin_unlock_irqrestore(ap->lock, flags);
+ return;
+ }
+ spin_unlock_irqrestore(ap->lock, flags);
+
+ WARN_ON(ap->pflags & ATA_PFLAG_SUSPENDED);
+
+ /* suspend */
+ ata_eh_freeze_port(ap);
+
+ if (ap->ops->port_suspend)
+ rc = ap->ops->port_suspend(ap, ap->pm_mesg);
+
+ /* report result */
+ spin_lock_irqsave(ap->lock, flags);
+
+ ap->pflags &= ~ATA_PFLAG_PM_PENDING;
+ if (rc == 0)
+ ap->pflags |= ATA_PFLAG_SUSPENDED;
+ else
+ ata_port_schedule_eh(ap);
+
+ if (ap->pm_result) {
+ *ap->pm_result = rc;
+ ap->pm_result = NULL;
+ }
+
+ spin_unlock_irqrestore(ap->lock, flags);
+
+ return;
+}
+
+/**
+ * ata_eh_handle_port_resume - perform port resume operation
+ * @ap: port to resume
+ *
+ * Resume @ap.
+ *
+ * This function also waits upto one second until all devices
+ * hanging off this port requests resume EH action. This is to
+ * prevent invoking EH and thus reset multiple times on resume.
+ *
+ * On DPM resume, where some of devices might not be resumed
+ * together, this may delay port resume upto one second, but such
+ * DPM resumes are rare and 1 sec delay isn't too bad.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep).
+ */
+static void ata_eh_handle_port_resume(struct ata_port *ap)
+{
+ unsigned long timeout;
+ unsigned long flags;
+ int i, rc = 0;
+
+ /* are we resuming? */
+ spin_lock_irqsave(ap->lock, flags);
+ if (!(ap->pflags & ATA_PFLAG_PM_PENDING) ||
+ ap->pm_mesg.event != PM_EVENT_ON) {
+ spin_unlock_irqrestore(ap->lock, flags);
+ return;
+ }
+ spin_unlock_irqrestore(ap->lock, flags);
+
+ /* spurious? */
+ if (!(ap->pflags & ATA_PFLAG_SUSPENDED))
+ goto done;
+
+ if (ap->ops->port_resume)
+ rc = ap->ops->port_resume(ap);
+
+ /* give devices time to request EH */
+ timeout = jiffies + HZ; /* 1s max */
+ while (1) {
+ for (i = 0; i < ATA_MAX_DEVICES; i++) {
+ struct ata_device *dev = &ap->device[i];
+ unsigned int action = ata_eh_dev_action(dev);
+
+ if ((dev->flags & ATA_DFLAG_SUSPENDED) &&
+ !(action & ATA_EH_RESUME))
+ break;
+ }
+
+ if (i == ATA_MAX_DEVICES || time_after(jiffies, timeout))
+ break;
+ msleep(10);
+ }
+
+ done:
+ spin_lock_irqsave(ap->lock, flags);
+ ap->pflags &= ~(ATA_PFLAG_PM_PENDING | ATA_PFLAG_SUSPENDED);
+ if (ap->pm_result) {
+ *ap->pm_result = rc;
+ ap->pm_result = NULL;
+ }
+ spin_unlock_irqrestore(ap->lock, flags);
+}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-21 15:56:52 +0000