From fd776ba9abdb6a89aa1ef500d7046caa35a0905a Mon Sep 17 00:00:00 2001 From: Olaf Hering Date: Fri, 2 Sep 2011 18:25:56 +0200 Subject: [PATCH] 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 Acked-by: K. Y. Srinivasan Signed-off-by: Greg Kroah-Hartman --- drivers/staging/hv/vmbus_drv.c | 21 ++++++++++++++++----- 1 file changed, 16 insertions(+), 5 deletions(-) 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 @@ static void get_channel_info(struct hv_device *device, 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 @@ static ssize_t vmbus_show_device_attr(struct device *dev, { 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 @@ static ssize_t vmbus_show_device_attr(struct device *dev, 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 @@ static struct device_attribute vmbus_device_attrs[] = { __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 struct device_attribute vmbus_device_attrs[] = { 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]; - - 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]); + int ret; + char alias_name[VMBUS_ALIAS_LEN + 1]; + print_alias_name(dev, alias_name); ret = add_uevent_var(env, "MODALIAS=vmbus:%s", alias_name); return ret; } -- 2.7.4