From e3670b81954ab1247341a08514aa4df09f0b495e Mon Sep 17 00:00:00 2001 From: Guenter Roeck Date: Tue, 26 Nov 2013 07:15:23 +0000 Subject: igb: Convert to use devm_hwmon_device_register_with_groups Simplify the code. Attach hwmon sysfs attributes to hwmon device instead of pci device. Avoid race conditions caused by attributes being created after registration and provide mandatory 'name' attribute by using new hwmon API. Other cleanup: Instead of allocating memory for hwmon attributes, move attributes and all other hwmon related data into struct hwmon_buff and allocate the entire structure using devm_kzalloc. Check return value from calls to igb_add_hwmon_attr() one by one instead of logically combining them all together. Signed-off-by: Guenter Roeck Tested-by: Aaron Brown Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/igb/igb_hwmon.c | 100 ++++++++++++++--------------- 1 file changed, 48 insertions(+), 52 deletions(-) (limited to 'drivers/net/ethernet/intel/igb/igb_hwmon.c') diff --git a/drivers/net/ethernet/intel/igb/igb_hwmon.c b/drivers/net/ethernet/intel/igb/igb_hwmon.c index 58f1ce967aeb..2e7ef2d0711f 100644 --- a/drivers/net/ethernet/intel/igb/igb_hwmon.c +++ b/drivers/net/ethernet/intel/igb/igb_hwmon.c @@ -117,8 +117,8 @@ static int igb_add_hwmon_attr(struct igb_adapter *adapter, unsigned int n_attr; struct hwmon_attr *igb_attr; - n_attr = adapter->igb_hwmon_buff.n_hwmon; - igb_attr = &adapter->igb_hwmon_buff.hwmon_list[n_attr]; + n_attr = adapter->igb_hwmon_buff->n_hwmon; + igb_attr = &adapter->igb_hwmon_buff->hwmon_list[n_attr]; switch (type) { case IGB_HWMON_TYPE_LOC: @@ -154,30 +154,16 @@ static int igb_add_hwmon_attr(struct igb_adapter *adapter, igb_attr->dev_attr.attr.mode = S_IRUGO; igb_attr->dev_attr.attr.name = igb_attr->name; sysfs_attr_init(&igb_attr->dev_attr.attr); - rc = device_create_file(&adapter->pdev->dev, - &igb_attr->dev_attr); - if (rc == 0) - ++adapter->igb_hwmon_buff.n_hwmon; - return rc; + adapter->igb_hwmon_buff->attrs[n_attr] = &igb_attr->dev_attr.attr; + + ++adapter->igb_hwmon_buff->n_hwmon; + + return 0; } static void igb_sysfs_del_adapter(struct igb_adapter *adapter) { - int i; - - if (adapter == NULL) - return; - - for (i = 0; i < adapter->igb_hwmon_buff.n_hwmon; i++) { - device_remove_file(&adapter->pdev->dev, - &adapter->igb_hwmon_buff.hwmon_list[i].dev_attr); - } - - kfree(adapter->igb_hwmon_buff.hwmon_list); - - if (adapter->igb_hwmon_buff.device) - hwmon_device_unregister(adapter->igb_hwmon_buff.device); } /* called from igb_main.c */ @@ -189,11 +175,11 @@ void igb_sysfs_exit(struct igb_adapter *adapter) /* called from igb_main.c */ int igb_sysfs_init(struct igb_adapter *adapter) { - struct hwmon_buff *igb_hwmon = &adapter->igb_hwmon_buff; + struct hwmon_buff *igb_hwmon; + struct i2c_client *client; + struct device *hwmon_dev; unsigned int i; - int n_attrs; int rc = 0; - struct i2c_client *client = NULL; /* If this method isn't defined we don't support thermals */ if (adapter->hw.mac.ops.init_thermal_sensor_thresh == NULL) @@ -201,34 +187,16 @@ int igb_sysfs_init(struct igb_adapter *adapter) /* Don't create thermal hwmon interface if no sensors present */ rc = (adapter->hw.mac.ops.init_thermal_sensor_thresh(&adapter->hw)); - if (rc) - goto exit; - - /* init i2c_client */ - client = i2c_new_device(&adapter->i2c_adap, &i350_sensor_info); - if (client == NULL) { - dev_info(&adapter->pdev->dev, - "Failed to create new i2c device..\n"); + if (rc) goto exit; - } - adapter->i2c_client = client; - /* Allocation space for max attributes - * max num sensors * values (loc, temp, max, caution) - */ - n_attrs = E1000_MAX_SENSORS * 4; - igb_hwmon->hwmon_list = kcalloc(n_attrs, sizeof(struct hwmon_attr), - GFP_KERNEL); - if (!igb_hwmon->hwmon_list) { + igb_hwmon = devm_kzalloc(&adapter->pdev->dev, sizeof(*igb_hwmon), + GFP_KERNEL); + if (!igb_hwmon) { rc = -ENOMEM; - goto err; - } - - igb_hwmon->device = hwmon_device_register(&adapter->pdev->dev); - if (IS_ERR(igb_hwmon->device)) { - rc = PTR_ERR(igb_hwmon->device); - goto err; + goto exit; } + adapter->igb_hwmon_buff = igb_hwmon; for (i = 0; i < E1000_MAX_SENSORS; i++) { @@ -240,11 +208,39 @@ int igb_sysfs_init(struct igb_adapter *adapter) /* Bail if any hwmon attr struct fails to initialize */ rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_CAUTION); - rc |= igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_LOC); - rc |= igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_TEMP); - rc |= igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_MAX); if (rc) - goto err; + goto exit; + rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_LOC); + if (rc) + goto exit; + rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_TEMP); + if (rc) + goto exit; + rc = igb_add_hwmon_attr(adapter, i, IGB_HWMON_TYPE_MAX); + if (rc) + goto exit; + } + + /* init i2c_client */ + client = i2c_new_device(&adapter->i2c_adap, &i350_sensor_info); + if (client == NULL) { + dev_info(&adapter->pdev->dev, + "Failed to create new i2c device.\n"); + rc = -ENODEV; + goto exit; + } + adapter->i2c_client = client; + + igb_hwmon->groups[0] = &igb_hwmon->group; + igb_hwmon->group.attrs = igb_hwmon->attrs; + + hwmon_dev = devm_hwmon_device_register_with_groups(&adapter->pdev->dev, + client->name, + igb_hwmon, + igb_hwmon->groups); + if (IS_ERR(hwmon_dev)) { + rc = PTR_ERR(hwmon_dev); + goto err; } goto exit; -- cgit v1.2.3-59-g8ed1b