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wireless: cw1200: use __maybe_unused to hide pm functions_ 

The cw1200 uses #ifdef to check for CONFIG_PM, but then
uses SIMPLE_DEV_PM_OPS, which leaves the references out when
CONFIG_PM_SLEEP is not defined, so we get a warning with
PM=y && PM_SLEEP=n:

drivers/net/wireless/st/cw1200/cw1200_spi.c:450:12: error: 'cw1200_spi_suspend' defined but not used [-Werror=unused-function]

This removes the incorrect #ifdef and instead uses a __maybe_unused
annotation to let the compiler know it can silently drop
the function definition.

For the DEV_PM_OPS definition, we can use an IS_ENABLED() check
to avoid defining the structure when CONFIG_PM is not set without
the #ifdef.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Arnd Bergmann 2016-03-02 16:59:02 +01:00 committed by Kalle Valo
parent 73fb270592
commit 836856e3bd
2 changed files with 9 additions and 9 deletions
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9
drivers/net/wireless/st/cw1200/cw1200_spi.c
View File

@ -446,8 +446,7 @@ static int cw1200_spi_disconnect(struct spi_device *func)
return 0;
}
#ifdef CONFIG_PM
static int cw1200_spi_suspend(struct device *dev)
static int __maybe_unused cw1200_spi_suspend(struct device *dev)
{
struct hwbus_priv *self = spi_get_drvdata(to_spi_device(dev));
@ -460,16 +459,12 @@ static int cw1200_spi_suspend(struct device *dev)
static SIMPLE_DEV_PM_OPS(cw1200_pm_ops, cw1200_spi_suspend, NULL);
#endif
static struct spi_driver spi_driver = {
.probe = cw1200_spi_probe,
.remove = cw1200_spi_disconnect,
.driver = {
.name = "cw1200_wlan_spi",
#ifdef CONFIG_PM
.pm = &cw1200_pm_ops,
#endif
.pm = IS_ENABLED(CONFIG_PM) ? &cw1200_pm_ops : NULL,
},
};

9
drivers/net/wireless/st/cw1200/pm.h
View File

@ -31,13 +31,18 @@ int cw1200_pm_init(struct cw1200_pm_state *pm,
void cw1200_pm_deinit(struct cw1200_pm_state *pm);
int cw1200_wow_suspend(struct ieee80211_hw *hw,
struct cfg80211_wowlan *wowlan);
int cw1200_wow_resume(struct ieee80211_hw *hw);
int cw1200_can_suspend(struct cw1200_common *priv);
int cw1200_wow_resume(struct ieee80211_hw *hw);
void cw1200_pm_stay_awake(struct cw1200_pm_state *pm,
unsigned long tmo);
#else
static inline void cw1200_pm_stay_awake(struct cw1200_pm_state *pm,
unsigned long tmo) {
unsigned long tmo)
{
}
static inline int cw1200_can_suspend(struct cw1200_common *priv)
{
return 0;
}
#endif
#endif