linux-kernel - [PATCH 01/20] usb/host: ohci-platform: Use pm

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Date:   Thu,  3 Sep 2020 13:25:35 +0200
From:   Paul Cercueil <paul@...pouillou.net>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Peter Chen <Peter.Chen@....com>,
        Cristian Birsan <cristian.birsan@...rochip.com>,
        Felipe Balbi <balbi@...nel.org>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Ludovic Desroches <ludovic.desroches@...rochip.com>,
        Avi Fishman <avifishman70@...il.com>,
        Tomer Maimon <tmaimon77@...il.com>,
        Tali Perry <tali.perry1@...il.com>,
        Patrick Venture <venture@...gle.com>,
        Nancy Yuen <yuenn@...gle.com>,
        Benjamin Fair <benjaminfair@...gle.com>,
        Alan Stern <stern@...land.harvard.edu>,
        Tony Prisk <linux@...sktech.co.nz>, Bin Liu <b-liu@...com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, openbmc@...ts.ozlabs.org,
        Paul Cercueil <paul@...pouillou.net>
Subject: [PATCH 01/20] usb/host: ohci-platform: Use pm_ptr() macro

Use the newly introduced pm_ptr() macro, and mark the suspend/resume
functions __maybe_unused. These functions can then be moved outside the
CONFIG_PM_SUSPEND block, and the compiler can then process them and
detect build failures independently of the config. If unused, they will
simply be discarded by the compiler.

Signed-off-by: Paul Cercueil <paul@...pouillou.net>
---
 drivers/usb/host/ohci-platform.c | 19 ++++++++-----------
 1 file changed, 8 insertions(+), 11 deletions(-)

diff --git a/drivers/usb/host/ohci-platform.c b/drivers/usb/host/ohci-platform.c
index 4a8456f12a73..21400d7d8b0a 100644
--- a/drivers/usb/host/ohci-platform.c
+++ b/drivers/usb/host/ohci-platform.c
@@ -176,22 +176,21 @@ static int ohci_platform_probe(struct platform_device *dev)
 	if (pdata->num_ports)
 		ohci->num_ports = pdata->num_ports;
 
-#ifndef CONFIG_USB_OHCI_BIG_ENDIAN_MMIO
-	if (ohci->flags & OHCI_QUIRK_BE_MMIO) {
+	if (!IS_ENABLED(CONFIG_USB_OHCI_BIG_ENDIAN_MMIO) &&
+	    ohci->flags & OHCI_QUIRK_BE_MMIO) {
 		dev_err(&dev->dev,
 			"Error: CONFIG_USB_OHCI_BIG_ENDIAN_MMIO not set\n");
 		err = -EINVAL;
 		goto err_reset;
 	}
-#endif
-#ifndef CONFIG_USB_OHCI_BIG_ENDIAN_DESC
-	if (ohci->flags & OHCI_QUIRK_BE_DESC) {
+
+	if (!IS_ENABLED(CONFIG_USB_OHCI_BIG_ENDIAN_DESC) &&
+	    ohci->flags & OHCI_QUIRK_BE_DESC) {
 		dev_err(&dev->dev,
 			"Error: CONFIG_USB_OHCI_BIG_ENDIAN_DESC not set\n");
 		err = -EINVAL;
 		goto err_reset;
 	}
-#endif
 
 	pm_runtime_set_active(&dev->dev);
 	pm_runtime_enable(&dev->dev);
@@ -267,8 +266,7 @@ static int ohci_platform_remove(struct platform_device *dev)
 	return 0;
 }
 
-#ifdef CONFIG_PM_SLEEP
-static int ohci_platform_suspend(struct device *dev)
+static int __maybe_unused ohci_platform_suspend(struct device *dev)
 {
 	struct usb_hcd *hcd = dev_get_drvdata(dev);
 	struct usb_ohci_pdata *pdata = dev->platform_data;
@@ -286,7 +284,7 @@ static int ohci_platform_suspend(struct device *dev)
 	return ret;
 }
 
-static int ohci_platform_resume(struct device *dev)
+static int __maybe_unused ohci_platform_resume(struct device *dev)
 {
 	struct usb_hcd *hcd = dev_get_drvdata(dev);
 	struct usb_ohci_pdata *pdata = dev_get_platdata(dev);
@@ -306,7 +304,6 @@ static int ohci_platform_resume(struct device *dev)
 
 	return 0;
 }
-#endif /* CONFIG_PM_SLEEP */
 
 static const struct of_device_id ohci_platform_ids[] = {
 	{ .compatible = "generic-ohci", },
@@ -332,7 +329,7 @@ static struct platform_driver ohci_platform_driver = {
 	.shutdown	= usb_hcd_platform_shutdown,
 	.driver		= {
 		.name	= "ohci-platform",
-		.pm	= &ohci_platform_pm_ops,
+		.pm	= pm_ptr(&ohci_platform_pm_ops),
 		.of_match_table = ohci_platform_ids,
 	}
 };
-- 
2.28.0