linux-kernel - [PATCH 1/3] fsi: Add fsi_master

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Date:   Mon, 19 Jun 2017 17:26:43 +0800
From:   Jeremy Kerr <jk@...abs.org>
To:     linux-kernel@...r.kernel.org
Cc:     Joel Stanley <joel@....id.au>,
        Christopher Bostic <cbostic@...ux.vnet.ibm.com>,
        Jeremy Kerr <jk@...abs.org>
Subject: [PATCH 1/3] fsi: Add fsi_master_rescan()

We'll want non-core fsi code to trigger a rescan, so introduce a
non-static fsi_master_rescan() function. Use this for the existing
unscan/scan behaviour too.

Signed-off-by: Jeremy Kerr <jk@...abs.org>
Reviewed-by: Joel Stanley <joel@....id.au>
Reviewed-by: Christopher Bostic <clbostic@...ux.vnet.ibm.com>
---
 drivers/fsi/fsi-core.c   | 9 +++++++--
 drivers/fsi/fsi-master.h | 2 ++
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/fsi/fsi-core.c b/drivers/fsi/fsi-core.c
index a485864..28d917e 100644
--- a/drivers/fsi/fsi-core.c
+++ b/drivers/fsi/fsi-core.c
@@ -762,14 +762,19 @@ static void fsi_master_unscan(struct fsi_master *master)
 	device_for_each_child(&master->dev, NULL, fsi_master_remove_slave);
 }
 
+int fsi_master_rescan(struct fsi_master *master)
+{
+	fsi_master_unscan(master);
+	return fsi_master_scan(master);
+}
+
 static ssize_t master_rescan_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t count)
 {
 	struct fsi_master *master = to_fsi_master(dev);
 	int rc;
 
-	fsi_master_unscan(master);
-	rc = fsi_master_scan(master);
+	rc = fsi_master_rescan(master);
 	if (rc < 0)
 		return rc;
 
diff --git a/drivers/fsi/fsi-master.h b/drivers/fsi/fsi-master.h
index 12f7b11..18bd4ad 100644
--- a/drivers/fsi/fsi-master.h
+++ b/drivers/fsi/fsi-master.h
@@ -40,4 +40,6 @@ struct fsi_master {
 extern int fsi_master_register(struct fsi_master *master);
 extern void fsi_master_unregister(struct fsi_master *master);
 
+extern int fsi_master_rescan(struct fsi_master *master);
+
 #endif /* DRIVERS_FSI_MASTER_H */
-- 
2.7.4