linux-kernel - [PATCH v2 06/10] RapidIO: Modify sysfs initialization for switches

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Message-Id: <1284476363-1677-7-git-send-email-alexandre.bounine@idt.com>
Date:	Tue, 14 Sep 2010 10:59:19 -0400
From:	Alexandre Bounine <alexandre.bounine@....com>
To:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org
Cc:	Alexandre Bounine <alexandre.bounine@....com>,
	Thomas Moll <thomas.moll@...go.com>,
	Matt Porter <mporter@...nel.crashing.org>,
	Li Yang <leoli@...escale.com>,
	Kumar Gala <galak@...nel.crashing.org>,
	Micha Nelissen <micha@...i.hopto.org>
Subject: [PATCH v2 06/10] RapidIO: Modify sysfs initialization for switches

1. Change to create attribute "routes" only for switches.
2. Add a switch-specific callback to create/remove proprietary attributes.

Signed-off-by: Alexandre Bounine <alexandre.bounine@....com>
Cc: Thomas Moll <thomas.moll@...go.com>
Cc: Matt Porter <mporter@...nel.crashing.org>
Cc: Li Yang <leoli@...escale.com>
Cc: Kumar Gala <galak@...nel.crashing.org>
Cc: Micha Nelissen <micha@...i.hopto.org>
---
 drivers/rapidio/rio-sysfs.c |   26 +++++++++++++++++++-------
 include/linux/rio.h         |    6 ++++++
 2 files changed, 25 insertions(+), 7 deletions(-)

diff --git a/drivers/rapidio/rio-sysfs.c b/drivers/rapidio/rio-sysfs.c
index 00b4756..137ed93 100644
--- a/drivers/rapidio/rio-sysfs.c
+++ b/drivers/rapidio/rio-sysfs.c
@@ -40,9 +40,6 @@ static ssize_t routes_show(struct device *dev, struct device_attribute *attr, ch
 	char *str = buf;
 	int i;
 
-	if (!rdev->rswitch)
-		goto out;
-
 	for (i = 0; i < RIO_MAX_ROUTE_ENTRIES(rdev->net->hport->sys_size);
 			i++) {
 		if (rdev->rswitch->route_table[i] == RIO_INVALID_ROUTE)
@@ -52,7 +49,6 @@ static ssize_t routes_show(struct device *dev, struct device_attribute *attr, ch
 			    rdev->rswitch->route_table[i]);
 	}
 
-      out:
 	return (str - buf);
 }
 
@@ -63,10 +59,11 @@ struct device_attribute rio_dev_attrs[] = {
 	__ATTR_RO(asm_did),
 	__ATTR_RO(asm_vid),
 	__ATTR_RO(asm_rev),
-	__ATTR_RO(routes),
 	__ATTR_NULL,
 };
 
+static DEVICE_ATTR(routes, S_IRUGO, routes_show, NULL);
+
 static ssize_t
 rio_read_config(struct file *filp, struct kobject *kobj,
 		struct bin_attribute *bin_attr,
@@ -218,7 +215,17 @@ int rio_create_sysfs_dev_files(struct rio_dev *rdev)
 {
 	int err = 0;
 
-	err = sysfs_create_bin_file(&rdev->dev.kobj, &rio_config_attr);
+	err = device_create_bin_file(&rdev->dev, &rio_config_attr);
+
+	if (!err && rdev->rswitch) {
+		err = device_create_file(&rdev->dev, &dev_attr_routes);
+		if (!err && rdev->rswitch->sw_sysfs)
+			err = rdev->rswitch->sw_sysfs(rdev, RIO_SW_SYSFS_CREATE);
+	}
+
+	if (err)
+		pr_warning("RIO: Failed to create attribute file(s) for %s\n",
+			   rio_name(rdev));
 
 	return err;
 }
@@ -231,5 +238,10 @@ int rio_create_sysfs_dev_files(struct rio_dev *rdev)
  */
 void rio_remove_sysfs_dev_files(struct rio_dev *rdev)
 {
-	sysfs_remove_bin_file(&rdev->dev.kobj, &rio_config_attr);
+	device_remove_bin_file(&rdev->dev, &rio_config_attr);
+	if (rdev->rswitch) {
+		device_remove_file(&rdev->dev, &dev_attr_routes);
+		if (rdev->rswitch->sw_sysfs)
+			rdev->rswitch->sw_sysfs(rdev, RIO_SW_SYSFS_REMOVE);
+	}
 }
diff --git a/include/linux/rio.h b/include/linux/rio.h
index 8d9e66d..4fa5e3d 100644
--- a/include/linux/rio.h
+++ b/include/linux/rio.h
@@ -218,6 +218,10 @@ struct rio_net {
 	unsigned char id;	/* RIO network ID */
 };
 
+/* Definitions used by switch sysfs initialization callback */
+#define RIO_SW_SYSFS_CREATE	1	/* Create switch attributes */
+#define RIO_SW_SYSFS_REMOVE	0	/* Remove switch attributes */
+
 /**
  * struct rio_switch - RIO switch info
  * @node: Node in global list of switches
@@ -234,6 +238,7 @@ struct rio_net {
  * @get_domain: Callback for switch-specific domain get function
  * @em_init: Callback for switch-specific error management initialization function
  * @em_handle: Callback for switch-specific error management handler function
+ * @sw_sysfs: Callback that initializes switch-specific sysfs attributes
  * @nextdev: Array of per-port pointers to the next attached device
  */
 struct rio_switch {
@@ -256,6 +261,7 @@ struct rio_switch {
 			   u8 *sw_domain);
 	int (*em_init) (struct rio_dev *dev);
 	int (*em_handle) (struct rio_dev *dev, u8 swport);
+	int (*sw_sysfs) (struct rio_dev *dev, int create);
 	struct rio_dev *nextdev[0];
 };
 
-- 
1.7.0.5

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