[PATCH 5/6] IB/ehca: beautify sysfs attribute code, fix compiler warnings

[Joachim Fenkes]

eHCA's sysfs attributes are now being created via sysfs_create_group(),
making the process neatly table-driven. The return value is checked, thus
fixing a few compiler warnings.

Signed-off-by: Joachim Fenkes <fenkes at de.ibm.com>
---
 drivers/infiniband/hw/ehca/ehca_main.c |   86 ++++++++++++++------------------
 1 files changed, 37 insertions(+), 49 deletions(-)

diff --git a/drivers/infiniband/hw/ehca/ehca_main.c b/drivers/infiniband/hw/ehca/ehca_main.c
index 2e27e68..dc736e8 100644
--- a/drivers/infiniband/hw/ehca/ehca_main.c
+++ b/drivers/infiniband/hw/ehca/ehca_main.c
@@ -454,15 +454,14 @@ static ssize_t ehca_store_debug_level(st
 DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
 	    ehca_show_debug_level, ehca_store_debug_level);
 
-void ehca_create_driver_sysfs(struct ibmebus_driver *drv)
-{
-	driver_create_file(&drv->driver, &driver_attr_debug_level);
-}
+static struct attribute *ehca_drv_attrs[] = {
+	&driver_attr_debug_level.attr,
+	NULL
+};
 
-void ehca_remove_driver_sysfs(struct ibmebus_driver *drv)
-{
-	driver_remove_file(&drv->driver, &driver_attr_debug_level);
-}
+static struct attribute_group ehca_drv_attr_grp = {
+	.attrs = ehca_drv_attrs
+};
 
 #define EHCA_RESOURCE_ATTR(name)                                           \
 static ssize_t  ehca_show_##name(struct device *dev,                       \
@@ -524,44 +523,28 @@ static ssize_t ehca_show_adapter_handle(
 }
 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
 
+static struct attribute *ehca_dev_attrs[] = {
+	&dev_attr_adapter_handle.attr,
+	&dev_attr_num_ports.attr,
+	&dev_attr_hw_ver.attr,
+	&dev_attr_max_eq.attr,
+	&dev_attr_cur_eq.attr,
+	&dev_attr_max_cq.attr,
+	&dev_attr_cur_cq.attr,
+	&dev_attr_max_qp.attr,
+	&dev_attr_cur_qp.attr,
+	&dev_attr_max_mr.attr,
+	&dev_attr_cur_mr.attr,
+	&dev_attr_max_mw.attr,
+	&dev_attr_cur_mw.attr,
+	&dev_attr_max_pd.attr,
+	&dev_attr_max_ah.attr,
+	NULL
+};
 
-void ehca_create_device_sysfs(struct ibmebus_dev *dev)
-{
-	device_create_file(&dev->ofdev.dev, &dev_attr_adapter_handle);
-	device_create_file(&dev->ofdev.dev, &dev_attr_num_ports);
-	device_create_file(&dev->ofdev.dev, &dev_attr_hw_ver);
-	device_create_file(&dev->ofdev.dev, &dev_attr_max_eq);
-	device_create_file(&dev->ofdev.dev, &dev_attr_cur_eq);
-	device_create_file(&dev->ofdev.dev, &dev_attr_max_cq);
-	device_create_file(&dev->ofdev.dev, &dev_attr_cur_cq);
-	device_create_file(&dev->ofdev.dev, &dev_attr_max_qp);
-	device_create_file(&dev->ofdev.dev, &dev_attr_cur_qp);
-	device_create_file(&dev->ofdev.dev, &dev_attr_max_mr);
-	device_create_file(&dev->ofdev.dev, &dev_attr_cur_mr);
-	device_create_file(&dev->ofdev.dev, &dev_attr_max_mw);
-	device_create_file(&dev->ofdev.dev, &dev_attr_cur_mw);
-	device_create_file(&dev->ofdev.dev, &dev_attr_max_pd);
-	device_create_file(&dev->ofdev.dev, &dev_attr_max_ah);
-}
-
-void ehca_remove_device_sysfs(struct ibmebus_dev *dev)
-{
-	device_remove_file(&dev->ofdev.dev, &dev_attr_adapter_handle);
-	device_remove_file(&dev->ofdev.dev, &dev_attr_num_ports);
-	device_remove_file(&dev->ofdev.dev, &dev_attr_hw_ver);
-	device_remove_file(&dev->ofdev.dev, &dev_attr_max_eq);
-	device_remove_file(&dev->ofdev.dev, &dev_attr_cur_eq);
-	device_remove_file(&dev->ofdev.dev, &dev_attr_max_cq);
-	device_remove_file(&dev->ofdev.dev, &dev_attr_cur_cq);
-	device_remove_file(&dev->ofdev.dev, &dev_attr_max_qp);
-	device_remove_file(&dev->ofdev.dev, &dev_attr_cur_qp);
-	device_remove_file(&dev->ofdev.dev, &dev_attr_max_mr);
-	device_remove_file(&dev->ofdev.dev, &dev_attr_cur_mr);
-	device_remove_file(&dev->ofdev.dev, &dev_attr_max_mw);
-	device_remove_file(&dev->ofdev.dev, &dev_attr_cur_mw);
-	device_remove_file(&dev->ofdev.dev, &dev_attr_max_pd);
-	device_remove_file(&dev->ofdev.dev, &dev_attr_max_ah);
-}
+static struct attribute_group ehca_dev_attr_grp = {
+	.attrs = ehca_dev_attrs
+};
 
 static int __devinit ehca_probe(struct ibmebus_dev *dev,
 				const struct of_device_id *id)
@@ -669,7 +652,10 @@ static int __devinit ehca_probe(struct i
 		}
 	}
 
-	ehca_create_device_sysfs(dev);
+	ret = sysfs_create_group(&dev->ofdev.dev.kobj, &ehca_dev_attr_grp);
+	if (ret) /* only complain; we can live without attributes */
+		ehca_err(&shca->ib_device,
+			 "Cannot create device attributes  ret=%d", ret);
 
 	spin_lock(&shca_list_lock);
 	list_add(&shca->shca_list, &shca_list);
@@ -721,7 +707,7 @@ static int __devexit ehca_remove(struct 
 	struct ehca_shca *shca = dev->ofdev.dev.driver_data;
 	int ret;
 
-	ehca_remove_device_sysfs(dev);
+	sysfs_remove_group(&dev->ofdev.dev.kobj, &ehca_dev_attr_grp);
 
 	if (ehca_open_aqp1 == 1) {
 		int i;
@@ -840,7 +826,9 @@ int __init ehca_module_init(void)
 		goto module_init2;
 	}
 
-	ehca_create_driver_sysfs(&ehca_driver);
+	ret = sysfs_create_group(&ehca_driver.driver.kobj, &ehca_drv_attr_grp);
+	if (ret) /* only complain; we can live without attributes */
+		ehca_gen_err("Cannot create driver attributes  ret=%d", ret);
 
 	if (ehca_poll_all_eqs != 1) {
 		ehca_gen_err("WARNING!!!");
@@ -867,7 +855,7 @@ void __exit ehca_module_exit(void)
 	if (ehca_poll_all_eqs == 1)
 		del_timer_sync(&poll_eqs_timer);
 
-	ehca_remove_driver_sysfs(&ehca_driver);
+	sysfs_remove_group(&ehca_driver.driver.kobj, &ehca_drv_attr_grp);
 	ibmebus_unregister_driver(&ehca_driver);
 
 	ehca_destroy_slab_caches();
-- 
1.4.2.1