[PATCH] libata: implement ata_std_probeinit()

This patch implements the off-the-shelf probeinit component operation.
Currently, all it does is waking up the PHY if it's a SATA port.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

drivers/scsi/libata-core.c

@@ -2295,6 +2295,19 @@ static int sata_phy_resume(struct ata_port *ap)
 	return -1;
 }
 
+/**
+ *	ata_std_probeinit - initialize probing
+ *	@ap: port to be probed
+ *
+ *	@ap is about to be probed.  Initialize it.  This function is
+ *	to be used as standard callback for ata_drive_probe_reset().
+ */
+extern void ata_std_probeinit(struct ata_port *ap)
+{
+	if (ap->flags & ATA_FLAG_SATA && ap->ops->scr_read)
+		sata_phy_resume(ap);
+}
+
 /**
  *	ata_std_softreset - reset host port via ATA SRST
  *	@ap: port to reset
@@ -2485,7 +2498,7 @@ int ata_std_probe_reset(struct ata_port *ap, unsigned int *classes)
 	if (ap->flags & ATA_FLAG_SATA && ap->ops->scr_read)
 		hardreset = sata_std_hardreset;
 
-	return ata_drive_probe_reset(ap, NULL,
+	return ata_drive_probe_reset(ap, ata_std_probeinit,
 				     ata_std_softreset, hardreset,
 				     ata_std_postreset, classes);
 }
@@ -5535,6 +5548,7 @@ EXPORT_SYMBOL_GPL(ata_port_probe);
 EXPORT_SYMBOL_GPL(sata_phy_reset);
 EXPORT_SYMBOL_GPL(__sata_phy_reset);
 EXPORT_SYMBOL_GPL(ata_bus_reset);
+EXPORT_SYMBOL_GPL(ata_std_probeinit);
 EXPORT_SYMBOL_GPL(ata_std_softreset);
 EXPORT_SYMBOL_GPL(sata_std_hardreset);
 EXPORT_SYMBOL_GPL(ata_std_postreset);

include/linux/libata.h

@@ -488,6 +488,7 @@ extern int ata_drive_probe_reset(struct ata_port *ap,
 			ata_probeinit_fn_t probeinit,
 			ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
 			ata_postreset_fn_t postreset, unsigned int *classes);
+extern void ata_std_probeinit(struct ata_port *ap);
 extern int ata_std_softreset(struct ata_port *ap, int verbose,
 			     unsigned int *classes);
 extern int sata_std_hardreset(struct ata_port *ap, int verbose,