linux-kernel - [PATCH 1/2] ata: brcm: mark PM functions as __maybe

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Message-Id: <20200107221506.2731280-1-arnd@arndb.de>
Date:   Tue,  7 Jan 2020 23:14:59 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Jens Axboe <axboe@...nel.dk>,
        Florian Fainelli <f.fainelli@...il.com>,
        Hans de Goede <hdegoede@...hat.com>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] ata: brcm: mark PM functions as __maybe_unused

The new shutdown callback causes a link failure:

drivers/ata/ahci_brcm.c: In function 'brcm_ahci_shutdown':
drivers/ata/ahci_brcm.c:552:8: error: implicit declaration of function 'brcm_ahci_suspend'; did you mean 'brcm_ahci_shutdown'? [-Werror=implicit-function-declaration]
  ret = brcm_ahci_suspend(&pdev->dev);
        ^~~~~~~~~~~~~~~~~

Remove the incorrect #ifdef and use __maybe_unused annotations
instead to make this more robust.

Fixes: 7de9b1688c1d ("ata: ahci_brcm: Add a shutdown callback")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/ata/ahci_brcm.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/ata/ahci_brcm.c b/drivers/ata/ahci_brcm.c
index 13ceca687104..239333d11b88 100644
--- a/drivers/ata/ahci_brcm.c
+++ b/drivers/ata/ahci_brcm.c
@@ -338,7 +338,6 @@ static const struct ata_port_info ahci_brcm_port_info = {
 	.port_ops	= &ahci_brcm_platform_ops,
 };
 
-#ifdef CONFIG_PM_SLEEP
 static int brcm_ahci_suspend(struct device *dev)
 {
 	struct ata_host *host = dev_get_drvdata(dev);
@@ -348,7 +347,10 @@ static int brcm_ahci_suspend(struct device *dev)
 
 	brcm_sata_phys_disable(priv);
 
-	ret = ahci_platform_suspend(dev);
+	if (IS_ENABLED(CONFIG_PM_SLEEP))
+		ret = ahci_platform_suspend(dev);
+	else
+		ret = 0;
 
 	if (!IS_ERR_OR_NULL(priv->rcdev))
 		reset_control_assert(priv->rcdev);
@@ -356,7 +358,7 @@ static int brcm_ahci_suspend(struct device *dev)
 	return ret;
 }
 
-static int brcm_ahci_resume(struct device *dev)
+static int __maybe_unused brcm_ahci_resume(struct device *dev)
 {
 	struct ata_host *host = dev_get_drvdata(dev);
 	struct ahci_host_priv *hpriv = host->private_data;
@@ -405,7 +407,6 @@ static int brcm_ahci_resume(struct device *dev)
 	ahci_platform_disable_clks(hpriv);
 	return ret;
 }
-#endif
 
 static struct scsi_host_template ahci_platform_sht = {
 	AHCI_SHT(DRV_NAME),
-- 
2.20.0