[PATCH] libata: implement ata_drive_probe_reset()

Most low level drivers share supported reset/classify actions and
sequence.  This patch implements ata_drive_probe_reset() which helps
constructing ->probe_reset from three component operations -
softreset, hardreset and postreset.  This minimizes duplicate code and
yet allows flexibility if needed. The three component operations can
also be shared by EH later.

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

1 files changed, 5 insertions, 0 deletions

diff --git a/include/linux/libata.h b/include/linux/libata.h
index a84d1c3a5429..38e08ce2d1af 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -241,6 +241,8 @@ struct ata_queued_cmd;
 
 /* typedefs */
 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
+typedef int (*ata_reset_fn_t)(struct ata_port *, int, unsigned int *);
+typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *);
 
 struct ata_ioports {
         unsigned long           cmd_addr;
@@ -478,6 +480,9 @@ extern void ata_port_probe(struct ata_port *);
 extern void __sata_phy_reset(struct ata_port *ap);
 extern void sata_phy_reset(struct ata_port *ap);
 extern void ata_bus_reset(struct ata_port *ap);
+extern int ata_drive_probe_reset(struct ata_port *ap,
+                        ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
+                        ata_postreset_fn_t postreset, unsigned int *classes);
 extern void ata_port_disable(struct ata_port *);
 extern void ata_std_ports(struct ata_ioports *ioaddr);
 #ifdef CONFIG_PCI