8 files changed, 100 insertions, 50 deletions

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 1ae443d7ab92..e00e1b913d28 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -173,7 +173,8 @@ enum {
 
         AHCI_FLAG_COMMON                = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
                                           ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
-                                          ATA_FLAG_SKIP_D2H_BSY,
+                                          ATA_FLAG_SKIP_D2H_BSY |
+                                          ATA_FLAG_ACPI_SATA,
 };
 
 struct ahci_cmd_hdr {
diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index ed4138e24b0c..02236739b40f 100644
--- a/drivers/ata/libata-acpi.c
+++ b/drivers/ata/libata-acpi.c
@@ -321,7 +321,7 @@ static int do_drive_get_GTF(struct ata_device *dev, unsigned int *gtf_length,
 
         /* Don't continue if device has no _ADR method.
          * _GTF is intended for known motherboard devices. */
-        if (!(ap->cbl == ATA_CBL_SATA)) {
+        if (!(ap->flags & ATA_FLAG_ACPI_SATA)) {
                 err = pata_get_dev_handle(gdev, &dev_handle, &pcidevfn);
                 if (err < 0) {
                         if (ata_msg_probe(ap))
@@ -343,7 +343,7 @@ static int do_drive_get_GTF(struct ata_device *dev, unsigned int *gtf_length,
 
         /* Get this drive's _ADR info. if not already known. */
         if (!dev->obj_handle) {
-                if (!(ap->cbl == ATA_CBL_SATA)) {
+                if (!(ap->flags & ATA_FLAG_ACPI_SATA)) {
                         /* get child objects of dev_handle == channel objects,
                          * + _their_ children == drive objects */
                         /* channel is ap->port_no */
@@ -528,7 +528,7 @@ static int do_drive_set_taskfiles(struct ata_device *dev,
                 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER: port#: %d\n",
                                __FUNCTION__, ap->port_no);
 
-        if (libata_noacpi || !(ap->cbl == ATA_CBL_SATA))
+        if (libata_noacpi || !(ap->flags & ATA_FLAG_ACPI_SATA))
                 return 0;
 
         if (!ata_dev_enabled(dev) || (ap->flags & ATA_FLAG_DISABLED))
@@ -578,7 +578,7 @@ int ata_acpi_exec_tfs(struct ata_port *ap)
          * we should not run GTF on PATA devices since some
          * PATA require execution of GTM/STM before GTF.
          */
-        if (!(ap->cbl == ATA_CBL_SATA))
+        if (!(ap->flags & ATA_FLAG_ACPI_SATA))
                 return 0;
 
         for (ix = 0; ix < ATA_MAX_DEVICES; ix++) {
@@ -641,7 +641,7 @@ int ata_acpi_push_id(struct ata_device *dev)
                                __FUNCTION__, dev->devno, ap->port_no);
 
         /* Don't continue if not a SATA device. */
-        if (!(ap->cbl == ATA_CBL_SATA)) {
+        if (!(ap->flags & ATA_FLAG_ACPI_SATA)) {
                 if (ata_msg_probe(ap))
                         ata_dev_printk(dev, KERN_DEBUG,
                                 "%s: Not a SATA device\n", __FUNCTION__);
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 4166407eb47c..d5939e659cbb 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -1919,7 +1919,6 @@ int ata_dev_configure(struct ata_device *dev)
                         snprintf(revbuf, 7, "ATA-%d",  ata_id_major_version(id));
 
                 dev->n_sectors = ata_id_n_sectors(id);
-                dev->n_sectors_boot = dev->n_sectors;
 
                 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
                 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
@@ -3632,7 +3631,6 @@ static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
         const u16 *old_id = dev->id;
         unsigned char model[2][ATA_ID_PROD_LEN + 1];
         unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
-        u64 new_n_sectors;
 
         if (dev->class != new_class) {
                 ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n",
@@ -3644,7 +3642,6 @@ static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
         ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
         ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
         ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
-        new_n_sectors = ata_id_n_sectors(new_id);
 
         if (strcmp(model[0], model[1])) {
                 ata_dev_printk(dev, KERN_INFO, "model number mismatch "
@@ -3658,25 +3655,12 @@ static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
                 return 0;
         }
 
-        if (dev->class == ATA_DEV_ATA && dev->n_sectors != new_n_sectors) {
-                ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch "
-                               "%llu != %llu\n",
-                               (unsigned long long)dev->n_sectors,
-                               (unsigned long long)new_n_sectors);
-                /* Are we the boot time size - if so we appear to be the
-                   same disk at this point and our HPA got reapplied */
-                if (ata_ignore_hpa && dev->n_sectors_boot == new_n_sectors 
-                    && ata_id_hpa_enabled(new_id))
-                        return 1;
-                return 0;
-        }
-
         return 1;
 }
 
 /**
- *      ata_dev_revalidate - Revalidate ATA device
- *      @dev: device to revalidate
+ *      ata_dev_reread_id - Re-read IDENTIFY data
+ *      @adev: target ATA device
  *      @readid_flags: read ID flags
  *
  *      Re-read IDENTIFY page and make sure @dev is still attached to
@@ -3688,34 +3672,68 @@ static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
  *      RETURNS:
  *      0 on success, negative errno otherwise
  */
-int ata_dev_revalidate(struct ata_device *dev, unsigned int readid_flags)
+int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
 {
         unsigned int class = dev->class;
         u16 *id = (void *)dev->ap->sector_buf;
         int rc;
 
-        if (!ata_dev_enabled(dev)) {
-                rc = -ENODEV;
-                goto fail;
-        }
-
         /* read ID data */
         rc = ata_dev_read_id(dev, &class, readid_flags, id);
         if (rc)
-                goto fail;
+                return rc;
 
         /* is the device still there? */
-        if (!ata_dev_same_device(dev, class, id)) {
-                rc = -ENODEV;
-                goto fail;
-        }
+        if (!ata_dev_same_device(dev, class, id))
+                return -ENODEV;
 
         memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
+        return 0;
+}
+
+/**
+ *      ata_dev_revalidate - Revalidate ATA device
+ *      @dev: device to revalidate
+ *      @readid_flags: read ID flags
+ *
+ *      Re-read IDENTIFY page, make sure @dev is still attached to the
+ *      port and reconfigure it according to the new IDENTIFY page.
+ *
+ *      LOCKING:
+ *      Kernel thread context (may sleep)
+ *
+ *      RETURNS:
+ *      0 on success, negative errno otherwise
+ */
+int ata_dev_revalidate(struct ata_device *dev, unsigned int readid_flags)
+{
+        u64 n_sectors = dev->n_sectors;
+        int rc;
+
+        if (!ata_dev_enabled(dev))
+                return -ENODEV;
+
+        /* re-read ID */
+        rc = ata_dev_reread_id(dev, readid_flags);
+        if (rc)
+                goto fail;
 
         /* configure device according to the new ID */
         rc = ata_dev_configure(dev);
-        if (rc == 0)
-                return 0;
+        if (rc)
+                goto fail;
+
+        /* verify n_sectors hasn't changed */
+        if (dev->class == ATA_DEV_ATA && dev->n_sectors != n_sectors) {
+                ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch "
+                               "%llu != %llu\n",
+                               (unsigned long long)n_sectors,
+                               (unsigned long long)dev->n_sectors);
+                rc = -ENODEV;
+                goto fail;
+        }
+
+        return 0;
 
  fail:
         ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc);
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index dd81fa78cdcf..b6a1de8fad5b 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -893,6 +893,23 @@ int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
         return queue_depth;
 }
 
+/* XXX: for ata_spindown_compat */
+static void ata_delayed_done_timerfn(unsigned long arg)
+{
+        struct scsi_cmnd *scmd = (void *)arg;
+
+        scmd->scsi_done(scmd);
+}
+
+/* XXX: for ata_spindown_compat */
+static void ata_delayed_done(struct scsi_cmnd *scmd)
+{
+        static struct timer_list timer;
+
+        setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd);
+        mod_timer(&timer, jiffies + 5 * HZ);
+}
+
 /**
  *      ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
  *      @qc: Storage for translated ATA taskfile
@@ -950,21 +967,24 @@ static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
                  * for more info.
                  */
                 if (ata_spindown_compat &&
+                    (qc->dev->flags & ATA_DFLAG_SPUNDOWN) &&
                     (system_state == SYSTEM_HALT ||
                      system_state == SYSTEM_POWER_OFF)) {
-                        static int warned = 0;
+                        static unsigned long warned = 0;
 
-                        if (!warned) {
-                                spin_unlock_irq(qc->ap->lock);
+                        if (!test_and_set_bit(0, &warned)) {
                                 ata_dev_printk(qc->dev, KERN_WARNING,
                                         "DISK MIGHT NOT BE SPUN DOWN PROPERLY. "
                                         "UPDATE SHUTDOWN UTILITY\n");
                                 ata_dev_printk(qc->dev, KERN_WARNING,
                                         "For more info, visit "
                                         "http://linux-ata.org/shutdown.html\n");
-                                warned = 1;
-                                ssleep(5);
-                                spin_lock_irq(qc->ap->lock);
+
+                                /* ->scsi_done is not used, use it for
+                                 * delayed completion.
+                                 */
+                                scmd->scsi_done = qc->scsidone;
+                                qc->scsidone = ata_delayed_done;
                         }
                         scmd->result = SAM_STAT_GOOD;
                         return 1;
@@ -1375,6 +1395,14 @@ static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
                 }
         }
 
+        /* XXX: track spindown state for spindown_compat */
+        if (unlikely(qc->tf.command == ATA_CMD_STANDBY ||
+                     qc->tf.command == ATA_CMD_STANDBYNOW1))
+                qc->dev->flags |= ATA_DFLAG_SPUNDOWN;
+        else if (likely(system_state != SYSTEM_HALT &&
+                        system_state != SYSTEM_POWER_OFF))
+                qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN;
+
         if (need_sense && !ap->ops->error_handler)
                 ata_dump_status(ap->print_id, &qc->result_tf);
 
@@ -1488,14 +1516,14 @@ static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
 
 early_finish:
         ata_qc_free(qc);
-        done(cmd);
+        qc->scsidone(cmd);
         DPRINTK("EXIT - early finish (good or error)\n");
         return 0;
 
 err_did:
         ata_qc_free(qc);
         cmd->result = (DID_ERROR << 16);
-        done(cmd);
+        qc->scsidone(cmd);
 err_mem:
         DPRINTK("EXIT - internal\n");
         return 0;
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index 8b71b73a199c..13cb0c9af68d 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -76,7 +76,8 @@ extern unsigned ata_exec_internal_sg(struct ata_device *dev,
 extern unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd);
 extern int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
                            unsigned int flags, u16 *id);
-extern int ata_dev_revalidate(struct ata_device *dev, unsigned int flags);
+extern int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags);
+extern int ata_dev_revalidate(struct ata_device *dev, unsigned int readid_flags);
 extern int ata_dev_configure(struct ata_device *dev);
 extern int sata_down_spd_limit(struct ata_port *ap);
 extern int sata_set_spd_needed(struct ata_port *ap);
diff --git a/drivers/ata/pata_scc.c b/drivers/ata/pata_scc.c
index cca3aa225efe..844e53b280c7 100644
--- a/drivers/ata/pata_scc.c
+++ b/drivers/ata/pata_scc.c
@@ -864,10 +864,10 @@ static void scc_bmdma_freeze (struct ata_port *ap)
  *      @ap: ATA port to be reset
  */
 
-static int scc_pata_prereset (struct ata_port *ap)
+static int scc_pata_prereset (struct ata_port *ap, unsigned long deadline)
 {
         ap->cbl = ATA_CBL_PATA80;
-        return ata_std_prereset(ap);
+        return ata_std_prereset(ap, deadline);
 }
 
 /**
diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index a69d78cd8e9b..0cb6618935b1 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -237,7 +237,8 @@ enum {
         /* host flags */
         SIL24_COMMON_FLAGS      = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
                                   ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
-                                  ATA_FLAG_NCQ | ATA_FLAG_SKIP_D2H_BSY,
+                                  ATA_FLAG_NCQ | ATA_FLAG_SKIP_D2H_BSY |
+                                  ATA_FLAG_ACPI_SATA,
         SIL24_FLAG_PCIX_IRQ_WOC = (1 << 24), /* IRQ loss errata on PCI-X */
 
         IRQ_STAT_4PORTS         = 0xf,
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 27d936279574..666592ef0b25 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -140,6 +140,7 @@ enum {
 
         ATA_DFLAG_PIO           = (1 << 8), /* device limited to PIO mode */
         ATA_DFLAG_NCQ_OFF       = (1 << 9), /* device limited to non-NCQ mode */
+        ATA_DFLAG_SPUNDOWN      = (1 << 10), /* XXX: for spindown_compat */
         ATA_DFLAG_INIT_MASK     = (1 << 16) - 1,
 
         ATA_DFLAG_DETACH        = (1 << 16),
@@ -173,6 +174,7 @@ enum {
         ATA_FLAG_SETXFER_POLLING= (1 << 14), /* use polling for SETXFER */
         ATA_FLAG_IGN_SIMPLEX    = (1 << 15), /* ignore SIMPLEX */
         ATA_FLAG_NO_IORDY       = (1 << 16), /* controller lacks iordy */
+        ATA_FLAG_ACPI_SATA      = (1 << 17), /* need native SATA ACPI layout */
 
         /* The following flag belongs to ap->pflags but is kept in
          * ap->flags because it's referenced in many LLDs and will be
@@ -431,7 +433,6 @@ struct ata_device {
         struct scsi_device      *sdev;          /* attached SCSI device */
         /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
         u64                     n_sectors;      /* size of device, if ATA */
-        u64                     n_sectors_boot; /* size of ATA device at startup */
         unsigned int            class;          /* ATA_DEV_xxx */
         u16                     id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
         u8                      pio_mode;