linux-kernel - [PATCH v3 1/4] ata: ahci_platform: fix ahci_platform

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Date:	Tue, 25 Mar 2014 18:26:12 +0100
From:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	Hans de Goede <hdegoede@...hat.com>, Sekhar Nori <nsekhar@...com>,
	Kevin Hilman <khilman@...prootsystems.com>,
	Viresh Kumar <viresh.linux@...il.com>,
	Shiraz Hashim <shiraz.hashim@...com>,
	linux-ide@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	davinci-linux-open-source@...ux.davincidsp.com,
	spear-devel@...t.st.com, b.zolnierkie@...sung.com
Subject: [PATCH v3 1/4] ata: ahci_platform: fix ahci_platform_data->suspend
 method handling

Looking at ST SPEAr1340 AHCI code (the only user of the deprecated
pdata->suspend and pdata->resume) it is obvious the we should return
after calling pdata->suspend() only if the function have returned
non-zero return value.  The code has been broken since commit 1e70c2
("ata/ahci_platform: Add clock framework support").  Fix it.

Cc: Viresh Kumar <viresh.linux@...il.com>
Cc: Shiraz Hashim <shiraz.hashim@...com>
Acked-by: Hans de Goede <hdegoede@...hat.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
---
v3:
- no changes
v2:
- updated patch description

 drivers/ata/ahci_platform.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index 70fbf66..7bd6adf 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -521,12 +521,19 @@ int ahci_platform_suspend(struct device *dev)
 	if (rc)
 		return rc;
 
-	if (pdata && pdata->suspend)
-		return pdata->suspend(dev);
+	if (pdata && pdata->suspend) {
+		rc = pdata->suspend(dev);
+		if (rc)
+			goto resume_host;
+	}
 
 	ahci_platform_disable_resources(hpriv);
 
 	return 0;
+
+resume_host:
+	ahci_platform_resume_host(dev);
+	return rc;
 }
 EXPORT_SYMBOL_GPL(ahci_platform_suspend);
 
-- 
1.8.2.3

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