7 files changed, 409 insertions, 297 deletions

diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
index fec2e9754aed..5b3fa2cbe722 100644
--- a/drivers/ata/libahci.c
+++ b/drivers/ata/libahci.c
@@ -125,6 +125,7 @@ EXPORT_SYMBOL_GPL(ahci_shost_attrs);
 struct device_attribute *ahci_sdev_attrs[] = {
 	&dev_attr_sw_activity,
 	&dev_attr_unload_heads,
+	&dev_attr_ncq_prio_supported,
 	&dev_attr_ncq_prio_enable,
 	NULL
 };
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 61c762961ca8..b8459c54f739 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -159,6 +159,12 @@ MODULE_DESCRIPTION("Library module for ATA devices");
 MODULE_LICENSE("GPL");
 MODULE_VERSION(DRV_VERSION);
 
+static inline bool ata_dev_print_info(struct ata_device *dev)
+{
+	struct ata_eh_context *ehc = &dev->link->eh_context;
+
+	return ehc->i.flags & ATA_EHI_PRINTINFO;
+}
 
 static bool ata_sstatus_online(u32 sstatus)
 {
@@ -706,11 +712,9 @@ int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
 		if (tf->flags & ATA_TFLAG_FUA)
 			tf->device |= 1 << 7;
 
-		if (dev->flags & ATA_DFLAG_NCQ_PRIO) {
-			if (class == IOPRIO_CLASS_RT)
-				tf->hob_nsect |= ATA_PRIO_HIGH <<
-						 ATA_SHIFT_PRIO;
-		}
+		if (dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLE &&
+		    class == IOPRIO_CLASS_RT)
+			tf->hob_nsect |= ATA_PRIO_HIGH << ATA_SHIFT_PRIO;
 	} else if (dev->flags & ATA_DFLAG_LBA) {
 		tf->flags |= ATA_TFLAG_LBA;
 
@@ -1266,8 +1270,7 @@ static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors)
  */
 static int ata_hpa_resize(struct ata_device *dev)
 {
-	struct ata_eh_context *ehc = &dev->link->eh_context;
-	int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
+	bool print_info = ata_dev_print_info(dev);
 	bool unlock_hpa = ata_ignore_hpa || dev->flags & ATA_DFLAG_UNLOCK_HPA;
 	u64 sectors = ata_id_n_sectors(dev->id);
 	u64 native_sectors;
@@ -2023,13 +2026,15 @@ retry:
 	err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,
 				     buf, sectors * ATA_SECT_SIZE, 0);
 
-	if (err_mask && dma) {
-		dev->horkage |= ATA_HORKAGE_NO_DMA_LOG;
-		ata_dev_warn(dev, "READ LOG DMA EXT failed, trying PIO\n");
-		goto retry;
+	if (err_mask) {
+		if (dma) {
+			dev->horkage |= ATA_HORKAGE_NO_DMA_LOG;
+			goto retry;
+		}
+		ata_dev_err(dev, "Read log page 0x%02x failed, Emask 0x%x\n",
+			    (unsigned int)page, err_mask);
 	}
 
-	DPRINTK("EXIT, err_mask=%x\n", err_mask);
 	return err_mask;
 }
 
@@ -2058,12 +2063,8 @@ static bool ata_identify_page_supported(struct ata_device *dev, u8 page)
 	 */
 	err = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, 0, ap->sector_buf,
 				1);
-	if (err) {
-		ata_dev_info(dev,
-			     "failed to get Device Identify Log Emask 0x%x\n",
-			     err);
+	if (err)
 		return false;
-	}
 
 	for (i = 0; i < ap->sector_buf[8]; i++) {
 		if (ap->sector_buf[9 + i] == page)
@@ -2127,11 +2128,7 @@ static void ata_dev_config_ncq_send_recv(struct ata_device *dev)
 	}
 	err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_SEND_RECV,
 				     0, ap->sector_buf, 1);
-	if (err_mask) {
-		ata_dev_dbg(dev,
-			    "failed to get NCQ Send/Recv Log Emask 0x%x\n",
-			    err_mask);
-	} else {
+	if (!err_mask) {
 		u8 *cmds = dev->ncq_send_recv_cmds;
 
 		dev->flags |= ATA_DFLAG_NCQ_SEND_RECV;
@@ -2157,11 +2154,7 @@ static void ata_dev_config_ncq_non_data(struct ata_device *dev)
 	}
 	err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_NON_DATA,
 				     0, ap->sector_buf, 1);
-	if (err_mask) {
-		ata_dev_dbg(dev,
-			    "failed to get NCQ Non-Data Log Emask 0x%x\n",
-			    err_mask);
-	} else {
+	if (!err_mask) {
 		u8 *cmds = dev->ncq_non_data_cmds;
 
 		memcpy(cmds, ap->sector_buf, ATA_LOG_NCQ_NON_DATA_SIZE);
@@ -2173,30 +2166,24 @@ static void ata_dev_config_ncq_prio(struct ata_device *dev)
 	struct ata_port *ap = dev->link->ap;
 	unsigned int err_mask;
 
-	if (!(dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLE)) {
-		dev->flags &= ~ATA_DFLAG_NCQ_PRIO;
-		return;
-	}
-
 	err_mask = ata_read_log_page(dev,
 				     ATA_LOG_IDENTIFY_DEVICE,
 				     ATA_LOG_SATA_SETTINGS,
 				     ap->sector_buf,
 				     1);
-	if (err_mask) {
-		ata_dev_dbg(dev,
-			    "failed to get Identify Device data, Emask 0x%x\n",
-			    err_mask);
-		return;
-	}
+	if (err_mask)
+		goto not_supported;
 
-	if (ap->sector_buf[ATA_LOG_NCQ_PRIO_OFFSET] & BIT(3)) {
-		dev->flags |= ATA_DFLAG_NCQ_PRIO;
-	} else {
-		dev->flags &= ~ATA_DFLAG_NCQ_PRIO;
-		ata_dev_dbg(dev, "SATA page does not support priority\n");
-	}
+	if (!(ap->sector_buf[ATA_LOG_NCQ_PRIO_OFFSET] & BIT(3)))
+		goto not_supported;
+
+	dev->flags |= ATA_DFLAG_NCQ_PRIO;
+
+	return;
 
+not_supported:
+	dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE;
+	dev->flags &= ~ATA_DFLAG_NCQ_PRIO;
 }
 
 static int ata_dev_config_ncq(struct ata_device *dev,
@@ -2346,11 +2333,8 @@ static void ata_dev_config_trusted(struct ata_device *dev)
 
 	err = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, ATA_LOG_SECURITY,
 			ap->sector_buf, 1);
-	if (err) {
-		ata_dev_dbg(dev,
-			    "failed to read Security Log, Emask 0x%x\n", err);
+	if (err)
 		return;
-	}
 
 	trusted_cap = get_unaligned_le64(&ap->sector_buf[40]);
 	if (!(trusted_cap & (1ULL << 63))) {
@@ -2363,6 +2347,106 @@ static void ata_dev_config_trusted(struct ata_device *dev)
 		dev->flags |= ATA_DFLAG_TRUSTED;
 }
 
+static int ata_dev_config_lba(struct ata_device *dev)
+{
+	struct ata_port *ap = dev->link->ap;
+	const u16 *id = dev->id;
+	const char *lba_desc;
+	char ncq_desc[24];
+	int ret;
+
+	dev->flags |= ATA_DFLAG_LBA;
+
+	if (ata_id_has_lba48(id)) {
+		lba_desc = "LBA48";
+		dev->flags |= ATA_DFLAG_LBA48;
+		if (dev->n_sectors >= (1UL << 28) &&
+		    ata_id_has_flush_ext(id))
+			dev->flags |= ATA_DFLAG_FLUSH_EXT;
+	} else {
+		lba_desc = "LBA";
+	}
+
+	/* config NCQ */
+	ret = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
+
+	/* print device info to dmesg */
+	if (ata_msg_drv(ap) && ata_dev_print_info(dev))
+		ata_dev_info(dev,
+			     "%llu sectors, multi %u: %s %s\n",
+			     (unsigned long long)dev->n_sectors,
+			     dev->multi_count, lba_desc, ncq_desc);
+
+	return ret;
+}
+
+static void ata_dev_config_chs(struct ata_device *dev)
+{
+	struct ata_port *ap = dev->link->ap;
+	const u16 *id = dev->id;
+
+	if (ata_id_current_chs_valid(id)) {
+		/* Current CHS translation is valid. */
+		dev->cylinders = id[54];
+		dev->heads     = id[55];
+		dev->sectors   = id[56];
+	} else {
+		/* Default translation */
+		dev->cylinders	= id[1];
+		dev->heads	= id[3];
+		dev->sectors	= id[6];
+	}
+
+	/* print device info to dmesg */
+	if (ata_msg_drv(ap) && ata_dev_print_info(dev))
+		ata_dev_info(dev,
+			     "%llu sectors, multi %u, CHS %u/%u/%u\n",
+			     (unsigned long long)dev->n_sectors,
+			     dev->multi_count, dev->cylinders,
+			     dev->heads, dev->sectors);
+}
+
+static void ata_dev_config_devslp(struct ata_device *dev)
+{
+	u8 *sata_setting = dev->link->ap->sector_buf;
+	unsigned int err_mask;
+	int i, j;
+
+	/*
+	 * Check device sleep capability. Get DevSlp timing variables
+	 * from SATA Settings page of Identify Device Data Log.
+	 */
+	if (!ata_id_has_devslp(dev->id))
+		return;
+
+	err_mask = ata_read_log_page(dev,
+				     ATA_LOG_IDENTIFY_DEVICE,
+				     ATA_LOG_SATA_SETTINGS,
+				     sata_setting, 1);
+	if (err_mask)
+		return;
+
+	dev->flags |= ATA_DFLAG_DEVSLP;
+	for (i = 0; i < ATA_LOG_DEVSLP_SIZE; i++) {
+		j = ATA_LOG_DEVSLP_OFFSET + i;
+		dev->devslp_timing[i] = sata_setting[j];
+	}
+}
+
+static void ata_dev_print_features(struct ata_device *dev)
+{
+	if (!(dev->flags & ATA_DFLAG_FEATURES_MASK))
+		return;
+
+	ata_dev_info(dev,
+		     "Features:%s%s%s%s%s\n",
+		     dev->flags & ATA_DFLAG_TRUSTED ? " Trust" : "",
+		     dev->flags & ATA_DFLAG_DA ? " Dev-Attention" : "",
+		     dev->flags & ATA_DFLAG_DEVSLP ? " Dev-Sleep" : "",
+		     dev->flags & ATA_DFLAG_NCQ_SEND_RECV ? " NCQ-sndrcv" : "",
+		     dev->flags & ATA_DFLAG_NCQ_PRIO ? " NCQ-prio" : "");
+}
+
 /**
  *	ata_dev_configure - Configure the specified ATA/ATAPI device
  *	@dev: Target device to configure
@@ -2379,8 +2463,7 @@ static void ata_dev_config_trusted(struct ata_device *dev)
 int ata_dev_configure(struct ata_device *dev)
 {
 	struct ata_port *ap = dev->link->ap;
-	struct ata_eh_context *ehc = &dev->link->eh_context;
-	int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
+	bool print_info = ata_dev_print_info(dev);
 	const u16 *id = dev->id;
 	unsigned long xfer_mask;
 	unsigned int err_mask;
@@ -2507,91 +2590,28 @@ int ata_dev_configure(struct ata_device *dev)
 					dev->multi_count = cnt;
 		}
 
-		if (ata_id_has_lba(id)) {
-			const char *lba_desc;
-			char ncq_desc[24];
-
-			lba_desc = "LBA";
-			dev->flags |= ATA_DFLAG_LBA;
-			if (ata_id_has_lba48(id)) {
-				dev->flags |= ATA_DFLAG_LBA48;
-				lba_desc = "LBA48";
-
-				if (dev->n_sectors >= (1UL << 28) &&
-				    ata_id_has_flush_ext(id))
-					dev->flags |= ATA_DFLAG_FLUSH_EXT;
-			}
+		/* print device info to dmesg */
+		if (ata_msg_drv(ap) && print_info)
+			ata_dev_info(dev, "%s: %s, %s, max %s\n",
+				     revbuf, modelbuf, fwrevbuf,
+				     ata_mode_string(xfer_mask));
 
-			/* config NCQ */
-			rc = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
+		if (ata_id_has_lba(id)) {
+			rc = ata_dev_config_lba(dev);
 			if (rc)
 				return rc;
-
-			/* print device info to dmesg */
-			if (ata_msg_drv(ap) && print_info) {
-				ata_dev_info(dev, "%s: %s, %s, max %s\n",
-					     revbuf, modelbuf, fwrevbuf,
-					     ata_mode_string(xfer_mask));
-				ata_dev_info(dev,
-					     "%llu sectors, multi %u: %s %s\n",
-					(unsigned long long)dev->n_sectors,
-					dev->multi_count, lba_desc, ncq_desc);
-			}
 		} else {
-			/* CHS */
-
-			/* Default translation */
-			dev->cylinders	= id[1];
-			dev->heads	= id[3];
-			dev->sectors	= id[6];
-
-			if (ata_id_current_chs_valid(id)) {
-				/* Current CHS translation is valid. */
-				dev->cylinders = id[54];
-				dev->heads     = id[55];
-				dev->sectors   = id[56];
-			}
-
-			/* print device info to dmesg */
-			if (ata_msg_drv(ap) && print_info) {
-				ata_dev_info(dev, "%s: %s, %s, max %s\n",
-					     revbuf,	modelbuf, fwrevbuf,
-					     ata_mode_string(xfer_mask));
-				ata_dev_info(dev,
-					     "%llu sectors, multi %u, CHS %u/%u/%u\n",
-					     (unsigned long long)dev->n_sectors,
-					     dev->multi_count, dev->cylinders,
-					     dev->heads, dev->sectors);
-			}
+			ata_dev_config_chs(dev);
 		}
 
-		/* Check and mark DevSlp capability. Get DevSlp timing variables
-		 * from SATA Settings page of Identify Device Data Log.
-		 */
-		if (ata_id_has_devslp(dev->id)) {
-			u8 *sata_setting = ap->sector_buf;
-			int i, j;
-
-			dev->flags |= ATA_DFLAG_DEVSLP;
-			err_mask = ata_read_log_page(dev,
-						     ATA_LOG_IDENTIFY_DEVICE,
-						     ATA_LOG_SATA_SETTINGS,
-						     sata_setting,
-						     1);
-			if (err_mask)
-				ata_dev_dbg(dev,
-					    "failed to get Identify Device Data, Emask 0x%x\n",
-					    err_mask);
-			else
-				for (i = 0; i < ATA_LOG_DEVSLP_SIZE; i++) {
-					j = ATA_LOG_DEVSLP_OFFSET + i;
-					dev->devslp_timing[i] = sata_setting[j];
-				}
-		}
+		ata_dev_config_devslp(dev);
 		ata_dev_config_sense_reporting(dev);
 		ata_dev_config_zac(dev);
 		ata_dev_config_trusted(dev);
 		dev->cdb_len = 32;
+
+		if (ata_msg_drv(ap) && print_info)
+			ata_dev_print_features(dev);
 	}
 
 	/* ATAPI-specific feature tests */
@@ -5573,7 +5593,7 @@ int ata_host_start(struct ata_host *host)
 			have_stop = 1;
 	}
 
-	if (host->ops->host_stop)
+	if (host->ops && host->ops->host_stop)
 		have_stop = 1;
 
 	if (have_stop) {
diff --git a/drivers/ata/libata-sata.c b/drivers/ata/libata-sata.c
index 8adeab76dd38..8f3ff830ab0c 100644
--- a/drivers/ata/libata-sata.c
+++ b/drivers/ata/libata-sata.c
@@ -834,28 +834,46 @@ DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
 	    ata_scsi_lpm_show, ata_scsi_lpm_store);
 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
 
+static ssize_t ata_ncq_prio_supported_show(struct device *device,
+					   struct device_attribute *attr,
+					   char *buf)
+{
+	struct scsi_device *sdev = to_scsi_device(device);
+	struct ata_port *ap = ata_shost_to_port(sdev->host);
+	struct ata_device *dev;
+	bool ncq_prio_supported;
+	int rc = 0;
+
+	spin_lock_irq(ap->lock);
+	dev = ata_scsi_find_dev(ap, sdev);
+	if (!dev)
+		rc = -ENODEV;
+	else
+		ncq_prio_supported = dev->flags & ATA_DFLAG_NCQ_PRIO;
+	spin_unlock_irq(ap->lock);
+
+	return rc ? rc : sysfs_emit(buf, "%u\n", ncq_prio_supported);
+}
+
+DEVICE_ATTR(ncq_prio_supported, S_IRUGO, ata_ncq_prio_supported_show, NULL);
+EXPORT_SYMBOL_GPL(dev_attr_ncq_prio_supported);
+
 static ssize_t ata_ncq_prio_enable_show(struct device *device,
 					struct device_attribute *attr,
 					char *buf)
 {
 	struct scsi_device *sdev = to_scsi_device(device);
-	struct ata_port *ap;
+	struct ata_port *ap = ata_shost_to_port(sdev->host);
 	struct ata_device *dev;
 	bool ncq_prio_enable;
 	int rc = 0;
 
-	ap = ata_shost_to_port(sdev->host);
-
 	spin_lock_irq(ap->lock);
 	dev = ata_scsi_find_dev(ap, sdev);
-	if (!dev) {
+	if (!dev)
 		rc = -ENODEV;
-		goto unlock;
-	}
-
-	ncq_prio_enable = dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLE;
-
-unlock:
+	else
+		ncq_prio_enable = dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLE;
 	spin_unlock_irq(ap->lock);
 
 	return rc ? rc : snprintf(buf, 20, "%u\n", ncq_prio_enable);
@@ -869,7 +887,7 @@ static ssize_t ata_ncq_prio_enable_store(struct device *device,
 	struct ata_port *ap;
 	struct ata_device *dev;
 	long int input;
-	int rc;
+	int rc = 0;
 
 	rc = kstrtol(buf, 10, &input);
 	if (rc)
@@ -883,27 +901,20 @@ static ssize_t ata_ncq_prio_enable_store(struct device *device,
 		return  -ENODEV;
 
 	spin_lock_irq(ap->lock);
+
+	if (!(dev->flags & ATA_DFLAG_NCQ_PRIO)) {
+		rc = -EINVAL;
+		goto unlock;
+	}
+
 	if (input)
 		dev->flags |= ATA_DFLAG_NCQ_PRIO_ENABLE;
 	else
 		dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE;
 
-	dev->link->eh_info.action |= ATA_EH_REVALIDATE;
-	dev->link->eh_info.flags |= ATA_EHI_QUIET;
-	ata_port_schedule_eh(ap);
+unlock:
 	spin_unlock_irq(ap->lock);
 
-	ata_port_wait_eh(ap);
-
-	if (input) {
-		spin_lock_irq(ap->lock);
-		if (!(dev->flags & ATA_DFLAG_NCQ_PRIO)) {
-			dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE;
-			rc = -EIO;
-		}
-		spin_unlock_irq(ap->lock);
-	}
-
 	return rc ? rc : len;
 }
 
@@ -914,6 +925,7 @@ EXPORT_SYMBOL_GPL(dev_attr_ncq_prio_enable);
 struct device_attribute *ata_ncq_sdev_attrs[] = {
 	&dev_attr_unload_heads,
 	&dev_attr_ncq_prio_enable,
+	&dev_attr_ncq_prio_supported,
 	NULL
 };
 EXPORT_SYMBOL_GPL(ata_ncq_sdev_attrs);
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index b9588c52815d..0b7b4624e4df 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -1766,53 +1766,6 @@ struct ata_scsi_args {
 };
 
 /**
- *	ata_scsi_rbuf_get - Map response buffer.
- *	@cmd: SCSI command containing buffer to be mapped.
- *	@flags: unsigned long variable to store irq enable status
- *	@copy_in: copy in from user buffer
- *
- *	Prepare buffer for simulated SCSI commands.
- *
- *	LOCKING:
- *	spin_lock_irqsave(ata_scsi_rbuf_lock) on success
- *
- *	RETURNS:
- *	Pointer to response buffer.
- */
-static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
-			       unsigned long *flags)
-{
-	spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
-
-	memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
-	if (copy_in)
-		sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
-				  ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
-	return ata_scsi_rbuf;
-}
-
-/**
- *	ata_scsi_rbuf_put - Unmap response buffer.
- *	@cmd: SCSI command containing buffer to be unmapped.
- *	@copy_out: copy out result
- *	@flags: @flags passed to ata_scsi_rbuf_get()
- *
- *	Returns rbuf buffer.  The result is copied to @cmd's buffer if
- *	@copy_back is true.
- *
- *	LOCKING:
- *	Unlocks ata_scsi_rbuf_lock.
- */
-static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
-				     unsigned long *flags)
-{
-	if (copy_out)
-		sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
-				    ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
-	spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
-}
-
-/**
  *	ata_scsi_rbuf_fill - wrapper for SCSI command simulators
  *	@args: device IDENTIFY data / SCSI command of interest.
  *	@actor: Callback hook for desired SCSI command simulator
@@ -1830,14 +1783,19 @@ static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
 		unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
 {
-	u8 *rbuf;
 	unsigned int rc;
 	struct scsi_cmnd *cmd = args->cmd;
 	unsigned long flags;
 
-	rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
-	rc = actor(args, rbuf);
-	ata_scsi_rbuf_put(cmd, rc == 0, &flags);
+	spin_lock_irqsave(&ata_scsi_rbuf_lock, flags);
+
+	memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
+	rc = actor(args, ata_scsi_rbuf);
+	if (rc == 0)
+		sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
+				    ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
+
+	spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags);
 
 	if (rc == 0)
 		cmd->result = SAM_STAT_GOOD;
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index ae7189d1a568..b71ea4a680b0 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -637,6 +637,20 @@ unsigned int ata_sff_data_xfer32(struct ata_queued_cmd *qc, unsigned char *buf,
 }
 EXPORT_SYMBOL_GPL(ata_sff_data_xfer32);
 
+static void ata_pio_xfer(struct ata_queued_cmd *qc, struct page *page,
+		unsigned int offset, size_t xfer_size)
+{
+	bool do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
+	unsigned char *buf;
+
+	buf = kmap_atomic(page);
+	qc->ap->ops->sff_data_xfer(qc, buf + offset, xfer_size, do_write);
+	kunmap_atomic(buf);
+
+	if (!do_write && !PageSlab(page))
+		flush_dcache_page(page);
+}
+
 /**
  *	ata_pio_sector - Transfer a sector of data.
  *	@qc: Command on going
@@ -648,11 +662,9 @@ EXPORT_SYMBOL_GPL(ata_sff_data_xfer32);
  */
 static void ata_pio_sector(struct ata_queued_cmd *qc)
 {
-	int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
 	struct ata_port *ap = qc->ap;
 	struct page *page;
 	unsigned int offset;
-	unsigned char *buf;
 
 	if (!qc->cursg) {
 		qc->curbytes = qc->nbytes;
@@ -670,13 +682,20 @@ static void ata_pio_sector(struct ata_queued_cmd *qc)
 
 	DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
 
-	/* do the actual data transfer */
-	buf = kmap_atomic(page);
-	ap->ops->sff_data_xfer(qc, buf + offset, qc->sect_size, do_write);
-	kunmap_atomic(buf);
+	/*
+	 * Split the transfer when it splits a page boundary.  Note that the
+	 * split still has to be dword aligned like all ATA data transfers.
+	 */
+	WARN_ON_ONCE(offset % 4);
+	if (offset + qc->sect_size > PAGE_SIZE) {
+		unsigned int split_len = PAGE_SIZE - offset;
 
-	if (!do_write && !PageSlab(page))
-		flush_dcache_page(page);
+		ata_pio_xfer(qc, page, offset, split_len);
+		ata_pio_xfer(qc, nth_page(page, 1), 0,
+			     qc->sect_size - split_len);
+	} else {
+		ata_pio_xfer(qc, page, offset, qc->sect_size);
+	}
 
 	qc->curbytes += qc->sect_size;
 	qc->cursg_ofs += qc->sect_size;
diff --git a/drivers/ata/pata_ixp4xx_cf.c b/drivers/ata/pata_ixp4xx_cf.c
index 5881d64af943..99c63087c8ae 100644
--- a/drivers/ata/pata_ixp4xx_cf.c
+++ b/drivers/ata/pata_ixp4xx_cf.c
@@ -13,45 +13,134 @@
  */
 
 #include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
 #include <linux/module.h>
 #include <linux/libata.h>
 #include <linux/irq.h>
 #include <linux/platform_device.h>
-#include <linux/platform_data/pata_ixp4xx_cf.h>
+#include <linux/regmap.h>
 #include <scsi/scsi_host.h>
 
 #define DRV_NAME	"pata_ixp4xx_cf"
-#define DRV_VERSION	"0.2"
+#define DRV_VERSION	"1.0"
 
-static int ixp4xx_set_mode(struct ata_link *link, struct ata_device **error)
+struct ixp4xx_pata {
+	struct ata_host *host;
+	struct regmap *rmap;
+	u32 cmd_csreg;
+	void __iomem *cmd;
+	void __iomem *ctl;
+};
+
+#define IXP4XX_EXP_TIMING_STRIDE	0x04
+/* The timings for the chipselect is in bits 29..16 */
+#define IXP4XX_EXP_T1_T5_MASK	GENMASK(29, 16)
+#define IXP4XX_EXP_PIO_0_8	0x0a470000
+#define IXP4XX_EXP_PIO_1_8	0x06430000
+#define IXP4XX_EXP_PIO_2_8	0x02410000
+#define IXP4XX_EXP_PIO_3_8	0x00820000
+#define IXP4XX_EXP_PIO_4_8	0x00400000
+#define IXP4XX_EXP_PIO_0_16	0x29640000
+#define IXP4XX_EXP_PIO_1_16	0x05030000
+#define IXP4XX_EXP_PIO_2_16	0x00b20000
+#define IXP4XX_EXP_PIO_3_16	0x00820000
+#define IXP4XX_EXP_PIO_4_16	0x00400000
+#define IXP4XX_EXP_BW_MASK	(BIT(6)|BIT(0))
+#define IXP4XX_EXP_BYTE_RD16	BIT(6) /* Byte reads on half-word devices */
+#define IXP4XX_EXP_BYTE_EN	BIT(0) /* Use 8bit data bus if set */
+
+static void ixp4xx_set_8bit_timing(struct ixp4xx_pata *ixpp, u8 pio_mode)
+{
+	switch (pio_mode) {
+	case XFER_PIO_0:
+		regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,
+				   IXP4XX_EXP_T1_T5_MASK, IXP4XX_EXP_PIO_0_8);
+		break;
+	case XFER_PIO_1:
+		regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,
+				   IXP4XX_EXP_T1_T5_MASK, IXP4XX_EXP_PIO_1_8);
+		break;
+	case XFER_PIO_2:
+		regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,
+				   IXP4XX_EXP_T1_T5_MASK, IXP4XX_EXP_PIO_2_8);
+		break;
+	case XFER_PIO_3:
+		regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,
+				   IXP4XX_EXP_T1_T5_MASK, IXP4XX_EXP_PIO_3_8);
+		break;
+	case XFER_PIO_4:
+		regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,
+				   IXP4XX_EXP_T1_T5_MASK, IXP4XX_EXP_PIO_4_8);
+		break;
+	default:
+		break;
+	}
+	regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,
+			   IXP4XX_EXP_BW_MASK, IXP4XX_EXP_BYTE_RD16|IXP4XX_EXP_BYTE_EN);
+}
+
+static void ixp4xx_set_16bit_timing(struct ixp4xx_pata *ixpp, u8 pio_mode)
 {
-	struct ata_device *dev;
-
-	ata_for_each_dev(dev, link, ENABLED) {
-		ata_dev_info(dev, "configured for PIO0\n");
-		dev->pio_mode = XFER_PIO_0;
-		dev->xfer_mode = XFER_PIO_0;
-		dev->xfer_shift = ATA_SHIFT_PIO;
-		dev->flags |= ATA_DFLAG_PIO;
+	switch (pio_mode){
+	case XFER_PIO_0:
+		regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,
+				   IXP4XX_EXP_T1_T5_MASK, IXP4XX_EXP_PIO_0_16);
+		break;
+	case XFER_PIO_1:
+		regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,
+				   IXP4XX_EXP_T1_T5_MASK, IXP4XX_EXP_PIO_1_16);
+		break;
+	case XFER_PIO_2:
+		regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,
+				   IXP4XX_EXP_T1_T5_MASK, IXP4XX_EXP_PIO_2_16);
+		break;
+	case XFER_PIO_3:
+		regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,
+				   IXP4XX_EXP_T1_T5_MASK, IXP4XX_EXP_PIO_3_16);
+		break;
+	case XFER_PIO_4:
+		regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,
+				   IXP4XX_EXP_T1_T5_MASK, IXP4XX_EXP_PIO_4_16);
+		break;
+	default:
+		break;
 	}
-	return 0;
+	regmap_update_bits(ixpp->rmap, ixpp->cmd_csreg,
+			   IXP4XX_EXP_BW_MASK, IXP4XX_EXP_BYTE_RD16);
+}
+
+/* This sets up the timing on the chipselect CMD accordingly */
+static void ixp4xx_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+	struct ixp4xx_pata *ixpp = ap->host->private_data;
+
+	ata_dev_printk(adev, KERN_INFO, "configured for PIO%d 8bit\n",
+		       adev->pio_mode - XFER_PIO_0);
+	ixp4xx_set_8bit_timing(ixpp, adev->pio_mode);
 }
 
+
 static unsigned int ixp4xx_mmio_data_xfer(struct ata_queued_cmd *qc,
-				unsigned char *buf, unsigned int buflen, int rw)
+					  unsigned char *buf, unsigned int buflen, int rw)
 {
 	unsigned int i;
 	unsigned int words = buflen >> 1;
 	u16 *buf16 = (u16 *) buf;
+	struct ata_device *adev = qc->dev;
 	struct ata_port *ap = qc->dev->link->ap;
 	void __iomem *mmio = ap->ioaddr.data_addr;
-	struct ixp4xx_pata_data *data = dev_get_platdata(ap->host->dev);
+	struct ixp4xx_pata *ixpp = ap->host->private_data;
+	unsigned long flags;
+
+	ata_dev_printk(adev, KERN_DEBUG, "%s %d bytes\n", (rw == READ) ? "READ" : "WRITE",
+		       buflen);
+	spin_lock_irqsave(ap->lock, flags);
 
 	/* set the expansion bus in 16bit mode and restore
 	 * 8 bit mode after the transaction.
 	 */
-	*data->cs0_cfg &= ~(0x01);
-	udelay(100);
+	ixp4xx_set_16bit_timing(ixpp, adev->pio_mode);
+	udelay(5);
 
 	/* Transfer multiple of 2 bytes */
 	if (rw == READ)
@@ -76,8 +165,10 @@ static unsigned int ixp4xx_mmio_data_xfer(struct ata_queued_cmd *qc,
 		words++;
 	}
 
-	udelay(100);
-	*data->cs0_cfg |= 0x01;
+	ixp4xx_set_8bit_timing(ixpp, adev->pio_mode);
+	udelay(5);
+
+	spin_unlock_irqrestore(ap->lock, flags);
 
 	return words << 1;
 }
@@ -90,79 +181,98 @@ static struct ata_port_operations ixp4xx_port_ops = {
 	.inherits		= &ata_sff_port_ops,
 	.sff_data_xfer		= ixp4xx_mmio_data_xfer,
 	.cable_detect		= ata_cable_40wire,
-	.set_mode		= ixp4xx_set_mode,
+	.set_piomode		= ixp4xx_set_piomode,
+};
+
+static struct ata_port_info ixp4xx_port_info = {
+	.flags		= ATA_FLAG_NO_ATAPI,
+	.pio_mask	= ATA_PIO4,
+	.port_ops	= &ixp4xx_port_ops,
 };
 
 static void ixp4xx_setup_port(struct ata_port *ap,
-			      struct ixp4xx_pata_data *data,
-			      unsigned long raw_cs0, unsigned long raw_cs1)
+			      struct ixp4xx_pata *ixpp,
+			      unsigned long raw_cmd, unsigned long raw_ctl)
 {
 	struct ata_ioports *ioaddr = &ap->ioaddr;
-	unsigned long raw_cmd = raw_cs0;
-	unsigned long raw_ctl = raw_cs1 + 0x06;
 
-	ioaddr->cmd_addr	= data->cs0;
-	ioaddr->altstatus_addr	= data->cs1 + 0x06;
-	ioaddr->ctl_addr	= data->cs1 + 0x06;
+	raw_ctl += 0x06;
+	ioaddr->cmd_addr	= ixpp->cmd;
+	ioaddr->altstatus_addr	= ixpp->ctl + 0x06;
+	ioaddr->ctl_addr	= ixpp->ctl + 0x06;
 
 	ata_sff_std_ports(ioaddr);
 
-#ifndef __ARMEB__
-
-	/* adjust the addresses to handle the address swizzling of the
-	 * ixp4xx in little endian mode.
-	 */
-
-	*(unsigned long *)&ioaddr->data_addr		^= 0x02;
-	*(unsigned long *)&ioaddr->cmd_addr		^= 0x03;
-	*(unsigned long *)&ioaddr->altstatus_addr	^= 0x03;
-	*(unsigned long *)&ioaddr->ctl_addr		^= 0x03;
-	*(unsigned long *)&ioaddr->error_addr		^= 0x03;
-	*(unsigned long *)&ioaddr->feature_addr		^= 0x03;
-	*(unsigned long *)&ioaddr->nsect_addr		^= 0x03;
-	*(unsigned long *)&ioaddr->lbal_addr		^= 0x03;
-	*(unsigned long *)&ioaddr->lbam_addr		^= 0x03;
-	*(unsigned long *)&ioaddr->lbah_addr		^= 0x03;
-	*(unsigned long *)&ioaddr->device_addr		^= 0x03;
-	*(unsigned long *)&ioaddr->status_addr		^= 0x03;
-	*(unsigned long *)&ioaddr->command_addr		^= 0x03;
-
-	raw_cmd ^= 0x03;
-	raw_ctl ^= 0x03;
-#endif
+	if (!IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)) {
+		/* adjust the addresses to handle the address swizzling of the
+		 * ixp4xx in little endian mode.
+		 */
+
+		*(unsigned long *)&ioaddr->data_addr		^= 0x02;
+		*(unsigned long *)&ioaddr->cmd_addr		^= 0x03;
+		*(unsigned long *)&ioaddr->altstatus_addr	^= 0x03;
+		*(unsigned long *)&ioaddr->ctl_addr		^= 0x03;
+		*(unsigned long *)&ioaddr->error_addr		^= 0x03;
+		*(unsigned long *)&ioaddr->feature_addr		^= 0x03;
+		*(unsigned long *)&ioaddr->nsect_addr		^= 0x03;
+		*(unsigned long *)&ioaddr->lbal_addr		^= 0x03;
+		*(unsigned long *)&ioaddr->lbam_addr		^= 0x03;
+		*(unsigned long *)&ioaddr->lbah_addr		^= 0x03;
+		*(unsigned long *)&ioaddr->device_addr		^= 0x03;
+		*(unsigned long *)&ioaddr->status_addr		^= 0x03;
+		*(unsigned long *)&ioaddr->command_addr		^= 0x03;
+
+		raw_cmd ^= 0x03;
+		raw_ctl ^= 0x03;
+	}
 
 	ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", raw_cmd, raw_ctl);
 }
 
 static int ixp4xx_pata_probe(struct platform_device *pdev)
 {
-	struct resource *cs0, *cs1;
-	struct ata_host *host;
-	struct ata_port *ap;
-	struct ixp4xx_pata_data *data = dev_get_platdata(&pdev->dev);
+	struct resource *cmd, *ctl;
+	struct ata_port_info pi = ixp4xx_port_info;
+	const struct ata_port_info *ppi[] = { &pi, NULL };
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct ixp4xx_pata *ixpp;
+	u32 csindex;
 	int ret;
 	int irq;
 
-	cs0 = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	cs1 = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	cmd = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	ctl = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 
-	if (!cs0 || !cs1)
+	if (!cmd || !ctl)
 		return -EINVAL;
 
-	/* allocate host */
-	host = ata_host_alloc(&pdev->dev, 1);
-	if (!host)
+	ixpp = devm_kzalloc(dev, sizeof(*ixpp), GFP_KERNEL);
+	if (!ixpp)
 		return -ENOMEM;
 
-	/* acquire resources and fill host */
-	ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+	ixpp->rmap = syscon_node_to_regmap(np->parent);
+	if (IS_ERR(ixpp->rmap))
+		return dev_err_probe(dev, PTR_ERR(ixpp->rmap), "no regmap\n");
+	/* Inspect our address to figure out what chipselect the CMD is on */
+	ret = of_property_read_u32_index(np, "reg", 0, &csindex);
 	if (ret)
-		return ret;
+		return dev_err_probe(dev, ret, "can't inspect CMD address\n");
+	dev_info(dev, "using CS%d for PIO timing configuration\n", csindex);
+	ixpp->cmd_csreg = csindex * IXP4XX_EXP_TIMING_STRIDE;
 
-	data->cs0 = devm_ioremap(&pdev->dev, cs0->start, 0x1000);
-	data->cs1 = devm_ioremap(&pdev->dev, cs1->start, 0x1000);
+	ixpp->host = ata_host_alloc_pinfo(dev, ppi, 1);
+	if (!ixpp->host)
+		return -ENOMEM;
+	ixpp->host->private_data = ixpp;
 
-	if (!data->cs0 || !data->cs1)
+	ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
+	if (ret)
+		return ret;
+
+	ixpp->cmd = devm_ioremap_resource(dev, cmd);
+	ixpp->ctl = devm_ioremap_resource(dev, ctl);
+	if (IS_ERR(ixpp->cmd) || IS_ERR(ixpp->ctl))
 		return -ENOMEM;
 
 	irq = platform_get_irq(pdev, 0);
@@ -173,27 +283,23 @@ static int ixp4xx_pata_probe(struct platform_device *pdev)
 	else
 		return -EINVAL;
 
-	/* Setup expansion bus chip selects */
-	*data->cs0_cfg = data->cs0_bits;
-	*data->cs1_cfg = data->cs1_bits;
-
-	ap = host->ports[0];
-
-	ap->ops	= &ixp4xx_port_ops;
-	ap->pio_mask = ATA_PIO4;
-	ap->flags |= ATA_FLAG_NO_ATAPI;
+	/* Just one port to set up */
+	ixp4xx_setup_port(ixpp->host->ports[0], ixpp, cmd->start, ctl->start);
 
-	ixp4xx_setup_port(ap, data, cs0->start, cs1->start);
+	ata_print_version_once(dev, DRV_VERSION);
 
-	ata_print_version_once(&pdev->dev, DRV_VERSION);
-
-	/* activate host */
-	return ata_host_activate(host, irq, ata_sff_interrupt, 0, &ixp4xx_sht);
+	return ata_host_activate(ixpp->host, irq, ata_sff_interrupt, 0, &ixp4xx_sht);
 }
 
+static const struct of_device_id ixp4xx_pata_of_match[] = {
+	{ .compatible = "intel,ixp4xx-compact-flash", },
+	{ },
+};
+
 static struct platform_driver ixp4xx_pata_platform_driver = {
 	.driver	 = {
 		.name   = DRV_NAME,
+		.of_match_table = ixp4xx_pata_of_match,
 	},
 	.probe		= ixp4xx_pata_probe,
 	.remove		= ata_platform_remove_one,
diff --git a/drivers/ata/sata_dwc_460ex.c b/drivers/ata/sata_dwc_460ex.c
index f0ef844428bb..338c2e50f759 100644
--- a/drivers/ata/sata_dwc_460ex.c
+++ b/drivers/ata/sata_dwc_460ex.c
@@ -1259,24 +1259,20 @@ static int sata_dwc_probe(struct platform_device *ofdev)
 	irq = irq_of_parse_and_map(np, 0);
 	if (irq == NO_IRQ) {
 		dev_err(&ofdev->dev, "no SATA DMA irq\n");
-		err = -ENODEV;
-		goto error_out;
+		return -ENODEV;
 	}
 
 #ifdef CONFIG_SATA_DWC_OLD_DMA
 	if (!of_find_property(np, "dmas", NULL)) {
 		err = sata_dwc_dma_init_old(ofdev, hsdev);
 		if (err)
-			goto error_out;
+			return err;
 	}
 #endif
 
 	hsdev->phy = devm_phy_optional_get(hsdev->dev, "sata-phy");
-	if (IS_ERR(hsdev->phy)) {
-		err = PTR_ERR(hsdev->phy);
-		hsdev->phy = NULL;
-		goto error_out;
-	}
+	if (IS_ERR(hsdev->phy))
+		return PTR_ERR(hsdev->phy);
 
 	err = phy_init(hsdev->phy);
 	if (err)