From f8bbfc247efb0e5fa69094614380768ce79afe17 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Fri, 19 May 2006 21:07:05 +0900
Subject: [PATCH] [PATCH] SCSI: make scsi_implement_eh() generic API for SCSI
transports
libata implemented a feature to schedule EH without an associated EH
by manipulating shost->host_eh_scheduled in ata_scsi_schedule_eh()
directly. Move this function to scsi_error.c and rename it to
scsi_schedule_eh(). It is now an exported API for SCSI transports and
exported via new header file drivers/scsi/scsi_transport_api.h
This patch also de-export scsi_eh_wakeup() which was exported
specifically for ata_scsi_schedule_eh().
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
drivers/scsi/libata-eh.c | 3 ++-
drivers/scsi/libata-scsi.c | 24 ------------------------
drivers/scsi/scsi_error.c | 23 ++++++++++++++++++++++-
drivers/scsi/scsi_priv.h | 1 +
drivers/scsi/scsi_transport_api.h | 6 ++++++
include/scsi/scsi_eh.h | 1 -
6 files changed, 31 insertions(+), 27 deletions(-)
create mode 100644 drivers/scsi/scsi_transport_api.h
diff --git a/drivers/scsi/libata-eh.c b/drivers/scsi/libata-eh.c
index 750e734d1c09..71b45ad2c124 100644
--- a/drivers/scsi/libata-eh.c
+++ b/drivers/scsi/libata-eh.c
@@ -39,6 +39,7 @@
#include <scsi/scsi_eh.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_cmnd.h>
+#include "scsi_transport_api.h"
#include <linux/libata.h>
@@ -432,7 +433,7 @@ void ata_port_schedule_eh(struct ata_port *ap)
WARN_ON(!ap->ops->error_handler);
ap->flags |= ATA_FLAG_EH_PENDING;
- ata_schedule_scsi_eh(ap->host);
+ scsi_schedule_eh(ap->host);
DPRINTK("port EH scheduled\n");
}
diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c
index f036ae4b8afb..2007b4b6e1b4 100644
--- a/drivers/scsi/libata-scsi.c
+++ b/drivers/scsi/libata-scsi.c
@@ -2745,27 +2745,3 @@ void ata_scsi_scan_host(struct ata_port *ap)
scsi_scan_target(&ap->host->shost_gendev, 0, i, 0, 0);
}
}
-
-/**
- * ata_schedule_scsi_eh - schedule EH for SCSI host
- * @shost: SCSI host to invoke error handling on.
- *
- * Schedule SCSI EH without scmd. This is a hack.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- **/
-void ata_schedule_scsi_eh(struct Scsi_Host *shost)
-{
- unsigned long flags;
-
- spin_lock_irqsave(shost->host_lock, flags);
-
- if (scsi_host_set_state(shost, SHOST_RECOVERY) == 0 ||
- scsi_host_set_state(shost, SHOST_CANCEL_RECOVERY) == 0) {
- shost->host_eh_scheduled++;
- scsi_eh_wakeup(shost);
- }
-
- spin_unlock_irqrestore(shost->host_lock, flags);
-}
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index 9ca71cbefce0..346ab72ebf86 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -56,7 +56,28 @@ void scsi_eh_wakeup(struct Scsi_Host *shost)
printk("Waking error handler thread\n"));
}
}
-EXPORT_SYMBOL_GPL(scsi_eh_wakeup);
+
+/**
+ * scsi_schedule_eh - schedule EH for SCSI host
+ * @shost: SCSI host to invoke error handling on.
+ *
+ * Schedule SCSI EH without scmd.
+ **/
+void scsi_schedule_eh(struct Scsi_Host *shost)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(shost->host_lock, flags);
+
+ if (scsi_host_set_state(shost, SHOST_RECOVERY) == 0 ||
+ scsi_host_set_state(shost, SHOST_CANCEL_RECOVERY) == 0) {
+ shost->host_eh_scheduled++;
+ scsi_eh_wakeup(shost);
+ }
+
+ spin_unlock_irqrestore(shost->host_lock, flags);
+}
+EXPORT_SYMBOL_GPL(scsi_schedule_eh);
/**
* scsi_eh_scmd_add - add scsi cmd to error handling.
diff --git a/drivers/scsi/scsi_priv.h b/drivers/scsi/scsi_priv.h
index 0b39081113be..27c48274e8cb 100644
--- a/drivers/scsi/scsi_priv.h
+++ b/drivers/scsi/scsi_priv.h
@@ -63,6 +63,7 @@ extern int scsi_delete_timer(struct scsi_cmnd *);
extern void scsi_times_out(struct scsi_cmnd *cmd);
extern int scsi_error_handler(void *host);
extern int scsi_decide_disposition(struct scsi_cmnd *cmd);
+extern void scsi_eh_wakeup(struct Scsi_Host *shost);
extern int scsi_eh_scmd_add(struct scsi_cmnd *, int);
/* scsi_lib.c */
diff --git a/drivers/scsi/scsi_transport_api.h b/drivers/scsi/scsi_transport_api.h
new file mode 100644
index 000000000000..934f0e62bb5c
--- /dev/null
+++ b/drivers/scsi/scsi_transport_api.h
@@ -0,0 +1,6 @@
+#ifndef _SCSI_TRANSPORT_API_H
+#define _SCSI_TRANSPORT_API_H
+
+void scsi_schedule_eh(struct Scsi_Host *shost);
+
+#endif /* _SCSI_TRANSPORT_API_H */
diff --git a/include/scsi/scsi_eh.h b/include/scsi/scsi_eh.h
index 212c983a6a18..d160880b2a87 100644
--- a/include/scsi/scsi_eh.h
+++ b/include/scsi/scsi_eh.h
@@ -35,7 +35,6 @@ static inline int scsi_sense_valid(struct scsi_sense_hdr *sshdr)
}
-extern void scsi_eh_wakeup(struct Scsi_Host *shost);
extern void scsi_eh_finish_cmd(struct scsi_cmnd *scmd,
struct list_head *done_q);
extern void scsi_eh_flush_done_q(struct list_head *done_q);