rio: warn_unused_result warnings fix

Adding failure path for the following two cases.

warning: ignoring return value of 'device_add', declared with attribute warn_unused_result
warning: ignoring return value of 'sysfs_create_bin_file', declared with attribute warn_unused_result

Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

2 files changed, 30 insertions, 19 deletions

diff --git a/drivers/rapidio/rio-scan.c b/drivers/rapidio/rio-scan.c
index 3b78540288c..45415096c29 100644
--- a/drivers/rapidio/rio-scan.c
+++ b/drivers/rapidio/rio-scan.c
@@ -263,15 +263,21 @@ static void rio_route_set_ops(struct rio_dev *rdev)
  * device to the RIO device list.  Creates the generic sysfs nodes
  * for an RIO device.
  */
-static void __devinit rio_add_device(struct rio_dev *rdev)
+static int __devinit rio_add_device(struct rio_dev *rdev)
 {
-        device_add(&rdev->dev);
+        int err;
+
+        err = device_add(&rdev->dev);
+        if (err)
+                return err;
 
         spin_lock(&rio_global_list_lock);
         list_add_tail(&rdev->global_list, &rio_devices);
         spin_unlock(&rio_global_list_lock);
 
         rio_create_sysfs_dev_files(rdev);
+
+        return 0;
 }
 
 /**
@@ -294,13 +300,14 @@ static struct rio_dev __devinit *rio_setup_device(struct rio_net *net,
                                         struct rio_mport *port, u16 destid,
                                         u8 hopcount, int do_enum)
 {
+        int ret = 0;
         struct rio_dev *rdev;
-        struct rio_switch *rswitch;
+        struct rio_switch *rswitch = NULL;
         int result, rdid;
 
         rdev = kzalloc(sizeof(struct rio_dev), GFP_KERNEL);
         if (!rdev)
-                goto out;
+                return NULL;
 
         rdev->net = net;
         rio_mport_read_config_32(port, destid, hopcount, RIO_DEV_ID_CAR,
@@ -343,23 +350,16 @@ static struct rio_dev __devinit *rio_setup_device(struct rio_net *net,
                 rio_mport_read_config_32(port, destid, hopcount,
                                          RIO_SWP_INFO_CAR, &rdev->swpinfo);
                 rswitch = kmalloc(sizeof(struct rio_switch), GFP_KERNEL);
-                if (!rswitch) {
-                        kfree(rdev);
-                        rdev = NULL;
-                        goto out;
-                }
+                if (!rswitch)
+                        goto cleanup;
                 rswitch->switchid = next_switchid;
                 rswitch->hopcount = hopcount;
                 rswitch->destid = destid;
                 rswitch->route_table = kzalloc(sizeof(u8)*
                                         RIO_MAX_ROUTE_ENTRIES(port->sys_size),
                                         GFP_KERNEL);
-                if (!rswitch->route_table) {
-                        kfree(rdev);
-                        rdev = NULL;
-                        kfree(rswitch);
-                        goto out;
-                }
+                if (!rswitch->route_table)
+                        goto cleanup;
                 /* Initialize switch route table */
                 for (rdid = 0; rdid < RIO_MAX_ROUTE_ENTRIES(port->sys_size);
                                 rdid++)
@@ -390,10 +390,19 @@ static struct rio_dev __devinit *rio_setup_device(struct rio_net *net,
                 rio_init_dbell_res(&rdev->riores[RIO_DOORBELL_RESOURCE],
                                    0, 0xffff);
 
-        rio_add_device(rdev);
+        ret = rio_add_device(rdev);
+        if (ret)
+                goto cleanup;
 
-      out:
         return rdev;
+
+cleanup:
+        if (rswitch) {
+                kfree(rswitch->route_table);
+                kfree(rswitch);
+        }
+        kfree(rdev);
+        return NULL;
 }
 
 /**
diff --git a/drivers/rapidio/rio-sysfs.c b/drivers/rapidio/rio-sysfs.c
index 97a147f050d..ba742e82c57 100644
--- a/drivers/rapidio/rio-sysfs.c
+++ b/drivers/rapidio/rio-sysfs.c
@@ -214,9 +214,11 @@ static struct bin_attribute rio_config_attr = {
  */
 int rio_create_sysfs_dev_files(struct rio_dev *rdev)
 {
-        sysfs_create_bin_file(&rdev->dev.kobj, &rio_config_attr);
+        int err = 0;
 
-        return 0;
+        err = sysfs_create_bin_file(&rdev->dev.kobj, &rio_config_attr);
+
+        return err;
 }
 
 /**