eHEA: Capability flag for DLPAR support

This patch introduces a capability flag that is used by the DLPAR userspace
tool to check which DLPAR features are supported by the eHEA driver.

Missing goto has been included.

Signed-off-by: Jan-Bernd Themann <themann@de.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 22 insertions, 1 deletions

diff --git a/drivers/net/ehea/ehea_main.c b/drivers/net/ehea/ehea_main.c
index bdb52419dbf5..383144db4d18 100644
--- a/drivers/net/ehea/ehea_main.c
+++ b/drivers/net/ehea/ehea_main.c
@@ -2923,6 +2923,15 @@ static int check_module_parm(void)
         return ret;
 }
 
+static ssize_t ehea_show_capabilities(struct device_driver *drv,
+                                      char *buf)
+{
+        return sprintf(buf, "%d", EHEA_CAPABILITIES);
+}
+
+static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
+                   ehea_show_capabilities, NULL);
+
 int __init ehea_module_init(void)
 {
         int ret;
@@ -2934,8 +2943,19 @@ int __init ehea_module_init(void)
         if (ret)
                 goto out;
         ret = ibmebus_register_driver(&ehea_driver);
-        if (ret)
+        if (ret) {
                 ehea_error("failed registering eHEA device driver on ebus");
+                goto out;
+        }
+
+        ret = driver_create_file(&ehea_driver.driver,
+                                 &driver_attr_capabilities);
+        if (ret) {
+                ehea_error("failed to register capabilities attribute, ret=%d",
+                           ret);
+                ibmebus_unregister_driver(&ehea_driver);
+                goto out;
+        }
 
 out:
         return ret;
@@ -2943,6 +2963,7 @@ out:
 
 static void __exit ehea_module_exit(void)
 {
+        driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
         ibmebus_unregister_driver(&ehea_driver);
 }