[PATCH v4 4/5] usb: ohci-exynos: Use DEFINE_SIMPLE_DEV_PM_OPS for PM functions

Anand Moon
2024-04-21T13:48:51Z

Use DEFINE_SIMPLE_DEV_PM_OPS macro to progressively switch from a code
model where PM callbacks are all protected behind CONFIG_PM guards,
to a code model where the PM callbacks are always seen by the compiler,
but discarded if not used.

Reviewed-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Anand Moon <linux.amoon@gmail.com>
---
v4: rephrase commit message
add reviewed by RB Alan Stern

v3: fix using new DEFINE_SIMPLE_DEV_PM_OPS PM macro hence
change the $subject and the commit message

v2: add __maybe_unused to suspend/resume functions in case CONFIG_PM
is disabled.
---
drivers/usb/host/ohci-exynos.c | 13 +++----------
1 file changed, 3 insertions(+), 10 deletions(-)

diff --git a/drivers/usb/host/ohci-exynos.c b/drivers/usb/host/ohci-exynos.c
index 89e6587c089b..3c4d68fd5c33 100644
--- a/drivers/usb/host/ohci-exynos.c
+++ b/drivers/usb/host/ohci-exynos.c
@@ -213,7 +213,6 @@ static void exynos_ohci_shutdown(struct platform_device *pdev)
hcd->driver->shutdown(hcd);
}

-#ifdef CONFIG_PM
static int exynos_ohci_suspend(struct device *dev)
{
struct usb_hcd *hcd = dev_get_drvdata(dev);
@@ -250,19 +249,13 @@ static int exynos_ohci_resume(struct device *dev)

return 0;
}
-#else
-#define exynos_ohci_suspend NULL
-#define exynos_ohci_resume NULL
-#endif

static const struct ohci_driver_overrides exynos_overrides __initconst = {
.extra_priv_size = sizeof(struct exynos_ohci_hcd),
};

-static const struct dev_pm_ops exynos_ohci_pm_ops = {
- .suspend = exynos_ohci_suspend,
- .resume = exynos_ohci_resume,
-};
+static DEFINE_SIMPLE_DEV_PM_OPS(exynos_ohci_pm_ops,
+ exynos_ohci_suspend, exynos_ohci_resume);

#ifdef CONFIG_OF
static const struct of_device_id exynos_ohci_match[] = {
@@ -278,7 +271,7 @@ static struct platform_driver exynos_ohci_driver = {
.shutdown = exynos_ohci_shutdown,
.driver = {
.name = "exynos-ohci",
- .pm = &exynos_ohci_pm_ops,
+ .pm = pm_ptr(&exynos_ohci_pm_ops),
.of_match_table = of_match_ptr(exynos_ohci_match),
}
};
--
2.44.0