Staging: hv: vmbus: Show the modalias in /sys/bus/vmbus/devices/*/
Show a modalias file in /sys/bus/vmbus/devices/*/
Add a helper function to print the same content in modalias and uevent.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Acked-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/hv/vmbus_drv.c b/drivers/staging/hv/vmbus_drv.c
index cd43ddd..c0f3b7a 100644
--- a/drivers/staging/hv/vmbus_drv.c
+++ b/drivers/staging/hv/vmbus_drv.c
@@ -93,6 +93,14 @@
debug_info.outbound.bytes_avail_towrite;
}
+#define VMBUS_ALIAS_LEN ((sizeof((struct hv_vmbus_device_id *)0)->guid) * 2)
+static void print_alias_name(struct hv_device *hv_dev, char *alias_name)
+{
+ int i;
+ for (i = 0; i < VMBUS_ALIAS_LEN; i += 2)
+ sprintf(&alias_name[i], "%02x", hv_dev->dev_type.b[i/2]);
+}
+
/*
* vmbus_show_device_attr - Show the device attribute in sysfs.
*
@@ -105,6 +113,7 @@
{
struct hv_device *hv_dev = device_to_hv_device(dev);
struct hv_device_info device_info;
+ char alias_name[VMBUS_ALIAS_LEN + 1];
memset(&device_info, 0, sizeof(struct hv_device_info));
@@ -148,6 +157,9 @@
device_info.chn_instance.b[13],
device_info.chn_instance.b[14],
device_info.chn_instance.b[15]);
+ } else if (!strcmp(dev_attr->attr.name, "modalias")) {
+ print_alias_name(hv_dev, alias_name);
+ return sprintf(buf, "vmbus:%s\n", alias_name);
} else if (!strcmp(dev_attr->attr.name, "state")) {
return sprintf(buf, "%d\n", device_info.chn_state);
} else if (!strcmp(dev_attr->attr.name, "id")) {
@@ -204,6 +216,7 @@
__ATTR(class_id, S_IRUGO, vmbus_show_device_attr, NULL),
__ATTR(device_id, S_IRUGO, vmbus_show_device_attr, NULL),
__ATTR(monitor_id, S_IRUGO, vmbus_show_device_attr, NULL),
+ __ATTR(modalias, S_IRUGO, vmbus_show_device_attr, NULL),
__ATTR(server_monitor_pending, S_IRUGO, vmbus_show_device_attr, NULL),
__ATTR(server_monitor_latency, S_IRUGO, vmbus_show_device_attr, NULL),
@@ -242,12 +255,10 @@
static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env)
{
struct hv_device *dev = device_to_hv_device(device);
- int i, ret;
- char alias_name[((sizeof((struct hv_vmbus_device_id *)0)->guid) + 1) * 2];
+ int ret;
+ char alias_name[VMBUS_ALIAS_LEN + 1];
- for (i = 0; i < ((sizeof((struct hv_vmbus_device_id *)0)->guid) * 2); i += 2)
- sprintf(&alias_name[i], "%02x", dev->dev_type.b[i/2]);
-
+ print_alias_name(dev, alias_name);
ret = add_uevent_var(env, "MODALIAS=vmbus:%s", alias_name);
return ret;
}