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be2net: make hwmon interface optional 

The hwmon interface in the be2net driver causes a link error when
be2net is built-in while the hwmon subsystem is a loadable module:

drivers/built-in.o: In function `be_probe':
drivers/net/ethernet/emulex/benet/be_main.c:5761: undefined reference to `devm_hwmon_device_register_with_groups'

This adds a new Kconfig symbol, following the example of multiple
other drivers that have the same problem. The new CONFIG_BE2NET_HWMON
will not be available when (BE2NET=y && HWMON=m) to avoid this
problem.

We have to also mark be_hwmon_show_temp as 'static' to ensure the
compiler can optimize out all the unused code.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 29e9122b3a ("be2net: Export board temperature using hwmon-sysfs interface.")
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnd Bergmann 2015-05-18 23:06:45 +02:00 committed by David S. Miller
parent aea0929e51
commit 9a03259c3d
2 changed files with 13 additions and 4 deletions
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9
drivers/net/ethernet/emulex/benet/Kconfig
View File

@ -5,6 +5,15 @@ config BE2NET
This driver implements the NIC functionality for ServerEngines'
10Gbps network adapter - BladeEngine.
config BE2NET_HWMON
bool "HWMON support for be2net driver"
depends on BE2NET && HWMON
depends on !(BE2NET=y && HWMON=m)
default y
---help---
Say Y here if you want to expose thermal sensor data on
be2net network adapter.
config BE2NET_VXLAN
bool "VXLAN offload support on be2net driver"
default y

8
drivers/net/ethernet/emulex/benet/be_main.c
View File

@ -5612,9 +5612,9 @@ static void be_remove(struct pci_dev *pdev)
free_netdev(adapter->netdev);
}
ssize_t be_hwmon_show_temp(struct device *dev,
struct device_attribute *dev_attr,
char *buf)
static ssize_t be_hwmon_show_temp(struct device *dev,
struct device_attribute *dev_attr,
char *buf)
{
struct be_adapter *adapter = dev_get_drvdata(dev);
@ -5756,7 +5756,7 @@ static int be_probe(struct pci_dev *pdev, const struct pci_device_id *pdev_id)
be_schedule_err_detection(adapter);
/* On Die temperature not supported for VF. */
if (be_physfn(adapter)) {
if (be_physfn(adapter) && IS_ENABLED(CONFIG_BE2NET_HWMON)) {
adapter->hwmon_info.hwmon_dev =
devm_hwmon_device_register_with_groups(&pdev->dev,
DRV_NAME,