[PATCH] libata: add ap->pflags and move core dynamic flags to it

ap->flags is way too clamped.  Separate out core dynamic flags to
ap->pflags.  ATA_FLAG_DISABLED is a dynamic flag but left alone as
it's referenced by a lot of LLDs and it's gonna be removed once all
LLDs are converted to new EH.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

6 files changed, 58 insertions, 52 deletions

diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c
index 15f6cd4279b7..7447ba0374e8 100644
--- a/drivers/scsi/ahci.c
+++ b/drivers/scsi/ahci.c
@@ -1052,7 +1052,7 @@ static void ahci_thaw(struct ata_port *ap)
 
 static void ahci_error_handler(struct ata_port *ap)
 {
-        if (!(ap->flags & ATA_FLAG_FROZEN)) {
+        if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
                 /* restart engine */
                 ahci_stop_engine(ap);
                 ahci_start_engine(ap);
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index fd0e6cc0619f..ccab1d7ceada 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -907,7 +907,7 @@ void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *), void *data,
 {
         int rc;
 
-        if (ap->flags & ATA_FLAG_FLUSH_PORT_TASK)
+        if (ap->pflags & ATA_PFLAG_FLUSH_PORT_TASK)
                 return;
 
         PREPARE_WORK(&ap->port_task, fn, data);
@@ -938,7 +938,7 @@ void ata_port_flush_task(struct ata_port *ap)
         DPRINTK("ENTER\n");
 
         spin_lock_irqsave(ap->lock, flags);
-        ap->flags |= ATA_FLAG_FLUSH_PORT_TASK;
+        ap->pflags |= ATA_PFLAG_FLUSH_PORT_TASK;
         spin_unlock_irqrestore(ap->lock, flags);
 
         DPRINTK("flush #1\n");
@@ -957,7 +957,7 @@ void ata_port_flush_task(struct ata_port *ap)
         }
 
         spin_lock_irqsave(ap->lock, flags);
-        ap->flags &= ~ATA_FLAG_FLUSH_PORT_TASK;
+        ap->pflags &= ~ATA_PFLAG_FLUSH_PORT_TASK;
         spin_unlock_irqrestore(ap->lock, flags);
 
         if (ata_msg_ctl(ap))
@@ -1009,7 +1009,7 @@ unsigned ata_exec_internal(struct ata_device *dev,
         spin_lock_irqsave(ap->lock, flags);
 
         /* no internal command while frozen */
-        if (ap->flags & ATA_FLAG_FROZEN) {
+        if (ap->pflags & ATA_PFLAG_FROZEN) {
                 spin_unlock_irqrestore(ap->lock, flags);
                 return AC_ERR_SYSTEM;
         }
@@ -2641,7 +2641,7 @@ int ata_std_prereset(struct ata_port *ap)
 
         /* if SATA, resume phy */
         if (ap->cbl == ATA_CBL_SATA) {
-                if (ap->flags & ATA_FLAG_LOADING)
+                if (ap->pflags & ATA_PFLAG_LOADING)
                         timing = sata_deb_timing_boot;
                 else
                         timing = sata_deb_timing_eh;
@@ -4294,7 +4294,7 @@ static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
         unsigned int i;
 
         /* no command while frozen */
-        if (unlikely(ap->flags & ATA_FLAG_FROZEN))
+        if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
                 return NULL;
 
         /* the last tag is reserved for internal command. */
@@ -4416,7 +4416,7 @@ void ata_qc_complete(struct ata_queued_cmd *qc)
          * taken care of.
          */
         if (ap->ops->error_handler) {
-                WARN_ON(ap->flags & ATA_FLAG_FROZEN);
+                WARN_ON(ap->pflags & ATA_PFLAG_FROZEN);
 
                 if (unlikely(qc->err_mask))
                         qc->flags |= ATA_QCFLAG_FAILED;
@@ -5051,13 +5051,13 @@ int ata_device_resume(struct ata_device *dev)
 {
         struct ata_port *ap = dev->ap;
 
-        if (ap->flags & ATA_FLAG_SUSPENDED) {
+        if (ap->pflags & ATA_PFLAG_SUSPENDED) {
                 struct ata_device *failed_dev;
 
                 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
                 ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 200000);
 
-                ap->flags &= ~ATA_FLAG_SUSPENDED;
+                ap->pflags &= ~ATA_PFLAG_SUSPENDED;
                 while (ata_set_mode(ap, &failed_dev))
                         ata_dev_disable(failed_dev);
         }
@@ -5088,7 +5088,7 @@ int ata_device_suspend(struct ata_device *dev, pm_message_t state)
 
         if (state.event != PM_EVENT_FREEZE)
                 ata_standby_drive(dev);
-        ap->flags |= ATA_FLAG_SUSPENDED;
+        ap->pflags |= ATA_PFLAG_SUSPENDED;
         return 0;
 }
 
@@ -5459,7 +5459,7 @@ int ata_device_add(const struct ata_probe_ent *ent)
                         ap->eh_info.probe_mask = (1 << ATA_MAX_DEVICES) - 1;
                         ap->eh_info.action |= ATA_EH_SOFTRESET;
 
-                        ap->flags |= ATA_FLAG_LOADING;
+                        ap->pflags |= ATA_PFLAG_LOADING;
                         ata_port_schedule_eh(ap);
 
                         spin_unlock_irqrestore(ap->lock, flags);
@@ -5527,7 +5527,7 @@ void ata_port_detach(struct ata_port *ap)
 
         /* tell EH we're leaving & flush EH */
         spin_lock_irqsave(ap->lock, flags);
-        ap->flags |= ATA_FLAG_UNLOADING;
+        ap->pflags |= ATA_PFLAG_UNLOADING;
         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 bf5a72aca8a4..f2f29a8bc38e 100644
--- a/drivers/scsi/libata-eh.c
+++ b/drivers/scsi/libata-eh.c
@@ -270,13 +270,13 @@ void ata_scsi_error(struct Scsi_Host *host)
                 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);
 
                 /* invoke EH.  if unloading, just finish failed qcs */
-                if (!(ap->flags & ATA_FLAG_UNLOADING))
+                if (!(ap->pflags & ATA_PFLAG_UNLOADING))
                         ap->ops->error_handler(ap);
                 else
                         ata_eh_finish(ap);
@@ -287,7 +287,7 @@ void ata_scsi_error(struct Scsi_Host *host)
                  */
                 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, "
@@ -323,19 +323,19 @@ void ata_scsi_error(struct Scsi_Host *host)
         /* clean up */
         spin_lock_irqsave(ap_lock, flags);
 
-        if (ap->flags & ATA_FLAG_LOADING) {
-                ap->flags &= ~ATA_FLAG_LOADING;
+        if (ap->pflags & ATA_PFLAG_LOADING) {
+                ap->pflags &= ~ATA_PFLAG_LOADING;
         } else {
-                if (ap->flags & ATA_FLAG_SCSI_HOTPLUG)
+                if (ap->pflags & ATA_PFLAG_SCSI_HOTPLUG)
                         queue_work(ata_aux_wq, &ap->hotplug_task);
-                if (ap->flags & ATA_FLAG_RECOVERED)
+                if (ap->pflags & ATA_PFLAG_RECOVERED)
                         ata_port_printk(ap, KERN_INFO, "EH complete\n");
         }
 
-        ap->flags &= ~(ATA_FLAG_SCSI_HOTPLUG | ATA_FLAG_RECOVERED);
+        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);
@@ -360,7 +360,7 @@ 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 +489,7 @@ 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 +513,7 @@ 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 +578,7 @@ 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 +646,7 @@ 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 +731,7 @@ 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 */
@@ -761,7 +761,7 @@ static void ata_eh_about_to_do(struct ata_port *ap, struct ata_device *dev,
 
         spin_lock_irqsave(ap->lock, flags);
         ata_eh_clear_action(dev, &ap->eh_info, action);
-        ap->flags |= ATA_FLAG_RECOVERED;
+        ap->pflags |= ATA_PFLAG_RECOVERED;
         spin_unlock_irqrestore(ap->lock, flags);
 }
 
@@ -1027,7 +1027,7 @@ 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? */
@@ -1327,7 +1327,7 @@ static void ata_eh_autopsy(struct ata_port *ap)
         }
 
         /* 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;
         else if (all_err_mask)
@@ -1385,7 +1385,7 @@ 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) {
@@ -1465,7 +1465,7 @@ 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 = !(ap->pflags & ATA_PFLAG_LOADING);
         unsigned int action;
         ata_reset_fn_t reset;
         int i, did_followup_srst, rc;
@@ -1636,7 +1636,7 @@ 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);
                 }
         }
@@ -1673,7 +1673,7 @@ 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))
+        if (ap->pflags & ATA_PFLAG_FROZEN || ata_port_nr_enabled(ap))
                 return 0;
 
         /* skip if class codes for all vacant slots are ATA_DEV_NONE */
@@ -1744,7 +1744,7 @@ 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;
 
         /* skip EH if possible. */
@@ -1908,7 +1908,7 @@ 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)) {
+        if (!(ap->pflags & ATA_PFLAG_LOADING)) {
                 ata_eh_autopsy(ap);
                 ata_eh_report(ap);
         }
diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c
index 2915bca691e8..153452e77264 100644
--- a/drivers/scsi/libata-scsi.c
+++ b/drivers/scsi/libata-scsi.c
@@ -2930,7 +2930,7 @@ void ata_scsi_hotplug(void *data)
         struct ata_port *ap = data;
         int i;
 
-        if (ap->flags & ATA_FLAG_UNLOADING) {
+        if (ap->pflags & ATA_PFLAG_UNLOADING) {
                 DPRINTK("ENTER/EXIT - unloading\n");
                 return;
         }
diff --git a/drivers/scsi/sata_sil.c b/drivers/scsi/sata_sil.c
index 7aabb45c35e5..70dbfb8a7d51 100644
--- a/drivers/scsi/sata_sil.c
+++ b/drivers/scsi/sata_sil.c
@@ -370,7 +370,7 @@ static void sil_host_intr(struct ata_port *ap, u32 bmdma2)
                  * during hardreset makes controllers with broken SIEN
                  * repeat probing needlessly.
                  */
-                if (!(ap->flags & ATA_FLAG_FROZEN)) {
+                if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
                         ata_ehi_hotplugged(&ap->eh_info);
                         ap->eh_info.serror |= serror;
                 }
diff --git a/include/linux/libata.h b/include/linux/libata.h
index f4284bf89758..b5d247d780f8 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -160,22 +160,27 @@ enum {
         ATA_FLAG_HRST_TO_RESUME = (1 << 11), /* hardreset to resume phy */
         ATA_FLAG_SKIP_D2H_BSY   = (1 << 12), /* can't wait for the first D2H
                                               * Register FIS clearing BSY */
-
         ATA_FLAG_DEBUGMSG       = (1 << 13),
-        ATA_FLAG_FLUSH_PORT_TASK = (1 << 14), /* flush port task */
 
-        ATA_FLAG_EH_PENDING     = (1 << 15), /* EH pending */
-        ATA_FLAG_EH_IN_PROGRESS = (1 << 16), /* EH in progress */
-        ATA_FLAG_FROZEN         = (1 << 17), /* port is frozen */
-        ATA_FLAG_RECOVERED      = (1 << 18), /* recovery action performed */
-        ATA_FLAG_LOADING        = (1 << 19), /* boot/loading probe */
-        ATA_FLAG_UNLOADING      = (1 << 20), /* module is unloading */
-        ATA_FLAG_SCSI_HOTPLUG   = (1 << 21), /* SCSI hotplug scheduled */
+        /* The following flag belongs to ap->pflags but is kept in
+         * ap->flags because it's referenced in many LLDs and will be
+         * removed in not-too-distant future.
+         */
+        ATA_FLAG_DISABLED       = (1 << 23), /* port is disabled, ignore it */
+
+        /* bits 24:31 of ap->flags are reserved for LLD specific flags */
 
-        ATA_FLAG_DISABLED       = (1 << 22), /* port is disabled, ignore it */
-        ATA_FLAG_SUSPENDED      = (1 << 23), /* port is suspended (power) */
+        /* struct ata_port pflags */
+        ATA_PFLAG_EH_PENDING    = (1 << 0), /* EH pending */
+        ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
+        ATA_PFLAG_FROZEN        = (1 << 2), /* port is frozen */
+        ATA_PFLAG_RECOVERED     = (1 << 3), /* recovery action performed */
+        ATA_PFLAG_LOADING       = (1 << 4), /* boot/loading probe */
+        ATA_PFLAG_UNLOADING     = (1 << 5), /* module is unloading */
+        ATA_PFLAG_SCSI_HOTPLUG  = (1 << 6), /* SCSI hotplug scheduled */
 
-        /* bits 24:31 of ap->flags are reserved for LLDD specific flags */
+        ATA_PFLAG_FLUSH_PORT_TASK = (1 << 16), /* flush port task */
+        ATA_PFLAG_SUSPENDED     = (1 << 17), /* port is suspended (power) */
 
         /* struct ata_queued_cmd flags */
         ATA_QCFLAG_ACTIVE       = (1 << 0), /* cmd not yet ack'd to scsi lyer */
@@ -486,6 +491,7 @@ struct ata_port {
         const struct ata_port_operations *ops;
         spinlock_t              *lock;
         unsigned long           flags;  /* ATA_FLAG_xxx */
+        unsigned int            pflags; /* ATA_PFLAG_xxx */
         unsigned int            id;     /* unique id req'd by scsi midlyr */
         unsigned int            port_no; /* unique port #; from zero */
         unsigned int            hard_port_no;   /* hardware port #; from zero */