From 03b77d8180378632e76f1157d9a685ca4c79d0cf Mon Sep 17 00:00:00 2001 From: Guenter Roeck Date: Tue, 26 Nov 2013 07:15:28 +0000 Subject: [PATCH] ixgbe: 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 hwmon device registration. Implicitly (through hwmon API) add mandatory 'name' sysfs attribute. 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: Phil Schmitt Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/ixgbe/ixgbe.h | 8 +- .../net/ethernet/intel/ixgbe/ixgbe_sysfs.c | 76 ++++++++----------- 2 files changed, 36 insertions(+), 48 deletions(-) diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe.h b/drivers/net/ethernet/intel/ixgbe/ixgbe.h index f38fc0a343a2..49531cd18987 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe.h +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe.h @@ -552,8 +552,10 @@ struct hwmon_attr { }; struct hwmon_buff { - struct device *device; - struct hwmon_attr *hwmon_list; + struct attribute_group group; + const struct attribute_group *groups[2]; + struct attribute *attrs[IXGBE_MAX_SENSORS * 4 + 1]; + struct hwmon_attr hwmon_list[IXGBE_MAX_SENSORS * 4]; unsigned int n_hwmon; }; #endif /* CONFIG_IXGBE_HWMON */ @@ -775,7 +777,7 @@ struct ixgbe_adapter { u32 vferr_refcount; struct kobject *info_kobj; #ifdef CONFIG_IXGBE_HWMON - struct hwmon_buff ixgbe_hwmon_buff; + struct hwmon_buff *ixgbe_hwmon_buff; #endif /* CONFIG_IXGBE_HWMON */ #ifdef CONFIG_DEBUG_FS struct dentry *ixgbe_dbg_adapter; diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_sysfs.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_sysfs.c index d118def16f35..3081974030cb 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_sysfs.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_sysfs.c @@ -111,8 +111,8 @@ static int ixgbe_add_hwmon_attr(struct ixgbe_adapter *adapter, unsigned int n_attr; struct hwmon_attr *ixgbe_attr; - n_attr = adapter->ixgbe_hwmon_buff.n_hwmon; - ixgbe_attr = &adapter->ixgbe_hwmon_buff.hwmon_list[n_attr]; + n_attr = adapter->ixgbe_hwmon_buff->n_hwmon; + ixgbe_attr = &adapter->ixgbe_hwmon_buff->hwmon_list[n_attr]; switch (type) { case IXGBE_HWMON_TYPE_LOC: @@ -147,32 +147,17 @@ static int ixgbe_add_hwmon_attr(struct ixgbe_adapter *adapter, ixgbe_attr->dev_attr.store = NULL; ixgbe_attr->dev_attr.attr.mode = S_IRUGO; ixgbe_attr->dev_attr.attr.name = ixgbe_attr->name; + sysfs_attr_init(&ixgbe_attr->dev_attr.attr); - rc = device_create_file(&adapter->pdev->dev, - &ixgbe_attr->dev_attr); + adapter->ixgbe_hwmon_buff->attrs[n_attr] = &ixgbe_attr->dev_attr.attr; - if (rc == 0) - ++adapter->ixgbe_hwmon_buff.n_hwmon; + ++adapter->ixgbe_hwmon_buff->n_hwmon; - return rc; + return 0; } static void ixgbe_sysfs_del_adapter(struct ixgbe_adapter *adapter) { - int i; - - if (adapter == NULL) - return; - - for (i = 0; i < adapter->ixgbe_hwmon_buff.n_hwmon; i++) { - device_remove_file(&adapter->pdev->dev, - &adapter->ixgbe_hwmon_buff.hwmon_list[i].dev_attr); - } - - kfree(adapter->ixgbe_hwmon_buff.hwmon_list); - - if (adapter->ixgbe_hwmon_buff.device) - hwmon_device_unregister(adapter->ixgbe_hwmon_buff.device); } /* called from ixgbe_main.c */ @@ -184,9 +169,9 @@ void ixgbe_sysfs_exit(struct ixgbe_adapter *adapter) /* called from ixgbe_main.c */ int ixgbe_sysfs_init(struct ixgbe_adapter *adapter) { - struct hwmon_buff *ixgbe_hwmon = &adapter->ixgbe_hwmon_buff; + struct hwmon_buff *ixgbe_hwmon; + struct device *hwmon_dev; unsigned int i; - int n_attrs; int rc = 0; /* If this method isn't defined we don't support thermals */ @@ -198,23 +183,13 @@ int ixgbe_sysfs_init(struct ixgbe_adapter *adapter) if (adapter->hw.mac.ops.init_thermal_sensor_thresh(&adapter->hw)) goto exit; - /* - * Allocation space for max attributs - * max num sensors * values (loc, temp, max, caution) - */ - n_attrs = IXGBE_MAX_SENSORS * 4; - ixgbe_hwmon->hwmon_list = kcalloc(n_attrs, sizeof(struct hwmon_attr), - GFP_KERNEL); - if (!ixgbe_hwmon->hwmon_list) { + ixgbe_hwmon = devm_kzalloc(&adapter->pdev->dev, sizeof(*ixgbe_hwmon), + GFP_KERNEL); + if (ixgbe_hwmon == NULL) { rc = -ENOMEM; - goto err; - } - - ixgbe_hwmon->device = hwmon_device_register(&adapter->pdev->dev); - if (IS_ERR(ixgbe_hwmon->device)) { - rc = PTR_ERR(ixgbe_hwmon->device); - goto err; + goto exit; } + adapter->ixgbe_hwmon_buff = ixgbe_hwmon; for (i = 0; i < IXGBE_MAX_SENSORS; i++) { /* @@ -226,17 +201,28 @@ int ixgbe_sysfs_init(struct ixgbe_adapter *adapter) /* Bail if any hwmon attr struct fails to initialize */ rc = ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_CAUTION); - rc |= ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_LOC); - rc |= ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_TEMP); - rc |= ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_MAX); if (rc) - goto err; + goto exit; + rc = ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_LOC); + if (rc) + goto exit; + rc = ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_TEMP); + if (rc) + goto exit; + rc = ixgbe_add_hwmon_attr(adapter, i, IXGBE_HWMON_TYPE_MAX); + if (rc) + goto exit; } - goto exit; + ixgbe_hwmon->groups[0] = &ixgbe_hwmon->group; + ixgbe_hwmon->group.attrs = ixgbe_hwmon->attrs; -err: - ixgbe_sysfs_del_adapter(adapter); + hwmon_dev = devm_hwmon_device_register_with_groups(&adapter->pdev->dev, + "ixgbe", + ixgbe_hwmon, + ixgbe_hwmon->groups); + if (IS_ERR(hwmon_dev)) + rc = PTR_ERR(hwmon_dev); exit: return rc; }