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usb: dwc3: of-simple: avoid unused function warnings 

An incorrect #ifdef caused a pair of harmless warnings when CONFIG_PM_SLEEP
is disabled:

drivers/usb/dwc3/dwc3-of-simple.c:223:12: error: 'dwc3_of_simple_resume' defined but not used [-Werror=unused-function]
 static int dwc3_of_simple_resume(struct device *dev)
            ^~~~~~~~~~~~~~~~~~~~~
drivers/usb/dwc3/dwc3-of-simple.c:213:12: error: 'dwc3_of_simple_suspend' defined but not used [-Werror=unused-function]
 static int dwc3_of_simple_suspend(struct device *dev)

Since the #ifdef method is generally hard to get right, use
a simpler __maybe_unused annotation here to let the compiler
drop the unused functions silently. This also improves
compile-time coverage.

Fixes: 76251db865 ("usb: dwc3: of-simple: reset host controller at suspend/resume")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Arnd Bergmann 2018-08-13 23:56:55 +02:00 committed by Felipe Balbi
parent 5b394b2ddf
commit 66174b6998
1 changed files with 4 additions and 6 deletions
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10
drivers/usb/dwc3/dwc3-of-simple.c
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@ -180,8 +180,7 @@ static int dwc3_of_simple_remove(struct platform_device *pdev)
return 0;
}
#ifdef CONFIG_PM
static int dwc3_of_simple_runtime_suspend(struct device *dev)
static int __maybe_unused dwc3_of_simple_runtime_suspend(struct device *dev)
{
struct dwc3_of_simple *simple = dev_get_drvdata(dev);
int i;
@ -192,7 +191,7 @@ static int dwc3_of_simple_runtime_suspend(struct device *dev)
return 0;
}
static int dwc3_of_simple_runtime_resume(struct device *dev)
static int __maybe_unused dwc3_of_simple_runtime_resume(struct device *dev)
{
struct dwc3_of_simple *simple = dev_get_drvdata(dev);
int ret;
@ -210,7 +209,7 @@ static int dwc3_of_simple_runtime_resume(struct device *dev)
return 0;
}
static int dwc3_of_simple_suspend(struct device *dev)
static int __maybe_unused dwc3_of_simple_suspend(struct device *dev)
{
struct dwc3_of_simple *simple = dev_get_drvdata(dev);
@ -220,7 +219,7 @@ static int dwc3_of_simple_suspend(struct device *dev)
return 0;
}
static int dwc3_of_simple_resume(struct device *dev)
static int __maybe_unused dwc3_of_simple_resume(struct device *dev)
{
struct dwc3_of_simple *simple = dev_get_drvdata(dev);
@ -229,7 +228,6 @@ static int dwc3_of_simple_resume(struct device *dev)
return 0;
}
#endif
static const struct dev_pm_ops dwc3_of_simple_dev_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(dwc3_of_simple_suspend, dwc3_of_simple_resume)