[PATCH] libata: implement port_task

Implement port_task.  LLDD's can schedule a function to be executed
with context after specified delay.  libata core takes care of
synchronization against EH.  This is generalized form of pio_task and
packet_task which are tied to PIO hsm implementation.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/libata.h b/include/linux/libata.h
index 66dce58f1941..3ad2570f663b 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -388,6 +388,8 @@ struct ata_port {
         struct ata_host_stats   stats;
         struct ata_host_set     *host_set;
 
+        struct work_struct      port_task;
+
         struct work_struct      packet_task;
 
         struct work_struct      pio_task;
@@ -515,6 +517,8 @@ extern int ata_ratelimit(void);
 extern unsigned int ata_busy_sleep(struct ata_port *ap,
                                    unsigned long timeout_pat,
                                    unsigned long timeout);
+extern void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *),
+                                void *data, unsigned long delay);
 
 /*
  * Default driver ops implementations