1 files changed, 25 insertions, 21 deletions

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 927b692d723c..303fc0d2b978 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2126,6 +2126,13 @@ int ata_dev_configure(struct ata_device *dev)
 	dev->horkage |= ata_dev_blacklisted(dev);
 	ata_force_horkage(dev);
 
+	if (dev->horkage & ATA_HORKAGE_DISABLE) {
+		ata_dev_printk(dev, KERN_INFO,
+			       "unsupported device, disabling\n");
+		ata_dev_disable(dev);
+		return 0;
+	}
+
 	/* let ACPI work its magic */
 	rc = ata_acpi_on_devcfg(dev);
 	if (rc)
@@ -3490,22 +3497,11 @@ int sata_link_resume(struct ata_link *link, const unsigned long *params,
 	if ((rc = sata_link_debounce(link, params, deadline)))
 		return rc;
 
-	/* Clear SError.  PMP and some host PHYs require this to
-	 * operate and clearing should be done before checking PHY
-	 * online status to avoid race condition (hotplugging between
-	 * link resume and status check).
-	 */
+	/* clear SError, some PHYs require this even for SRST to work */
 	if (!(rc = sata_scr_read(link, SCR_ERROR, &serror)))
 		rc = sata_scr_write(link, SCR_ERROR, serror);
-	if (rc == 0 || rc == -EINVAL) {
-		unsigned long flags;
 
-		spin_lock_irqsave(link->ap->lock, flags);
-		link->eh_info.serror = 0;
-		spin_unlock_irqrestore(link->ap->lock, flags);
-		rc = 0;
-	}
-	return rc;
+	return rc != -EINVAL ? rc : 0;
 }
 
 /**
@@ -3653,9 +3649,13 @@ int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
 	if (check_ready)
 		rc = ata_wait_ready(link, deadline, check_ready);
  out:
-	if (rc && rc != -EAGAIN)
+	if (rc && rc != -EAGAIN) {
+		/* online is set iff link is online && reset succeeded */
+		if (online)
+			*online = false;
 		ata_link_printk(link, KERN_ERR,
 				"COMRESET failed (errno=%d)\n", rc);
+	}
 	DPRINTK("EXIT, rc=%d\n", rc);
 	return rc;
 }
@@ -3700,8 +3700,14 @@ int sata_std_hardreset(struct ata_link *link, unsigned int *class,
  */
 void ata_std_postreset(struct ata_link *link, unsigned int *classes)
 {
+	u32 serror;
+
 	DPRINTK("ENTER\n");
 
+	/* reset complete, clear SError */
+	if (!sata_scr_read(link, SCR_ERROR, &serror))
+		sata_scr_write(link, SCR_ERROR, serror);
+
 	/* print link status */
 	sata_print_link_status(link);
 
@@ -3894,8 +3900,7 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
 	{ "SAMSUNG CD-ROM SN-124", "N001",	ATA_HORKAGE_NODMA },
 	{ "Seagate STT20000A", NULL,		ATA_HORKAGE_NODMA },
 	/* Odd clown on sil3726/4726 PMPs */
-	{ "Config  Disk",	NULL,		ATA_HORKAGE_NODMA |
-						ATA_HORKAGE_SKIP_PM },
+	{ "Config  Disk",	NULL,		ATA_HORKAGE_DISABLE },
 
 	/* Weird ATAPI devices */
 	{ "TORiSAN DVD-ROM DRD-N216", NULL,	ATA_HORKAGE_MAX_SEC_128 },
@@ -4292,7 +4297,7 @@ void ata_sg_clean(struct ata_queued_cmd *qc)
 }
 
 /**
- *	ata_check_atapi_dma - Check whether ATAPI DMA can be supported
+ *	atapi_check_dma - Check whether ATAPI DMA can be supported
  *	@qc: Metadata associated with taskfile to check
  *
  *	Allow low-level driver to filter ATA PACKET commands, returning
@@ -4305,7 +4310,7 @@ void ata_sg_clean(struct ata_queued_cmd *qc)
  *	RETURNS: 0 when ATAPI DMA can be used
  *               nonzero otherwise
  */
-int ata_check_atapi_dma(struct ata_queued_cmd *qc)
+int atapi_check_dma(struct ata_queued_cmd *qc)
 {
 	struct ata_port *ap = qc->ap;
 
@@ -5398,7 +5403,7 @@ static void ata_host_stop(struct device *gendev, void *res)
  */
 static void ata_finalize_port_ops(struct ata_port_operations *ops)
 {
-	static spinlock_t lock = SPIN_LOCK_UNLOCKED;
+	static DEFINE_SPINLOCK(lock);
 	const struct ata_port_operations *cur;
 	void **begin = (void **)ops;
 	void **end = (void **)&ops->inherits;
@@ -5616,7 +5621,7 @@ int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
 			spin_lock_irqsave(ap->lock, flags);
 
 			ehi->probe_mask |= ATA_ALL_DEVICES;
-			ehi->action |= ATA_EH_RESET;
+			ehi->action |= ATA_EH_RESET | ATA_EH_LPM;
 			ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
 
 			ap->pflags &= ~ATA_PFLAG_INITIALIZING;
@@ -5649,7 +5654,6 @@ int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
 		struct ata_port *ap = host->ports[i];
 
 		ata_scsi_scan_host(ap, 1);
-		ata_lpm_schedule(ap, ap->pm_policy);
 	}
 
 	return 0;