[PATCH] libata: fix compile warning caused by ignoring __must_check results

[Tejun Heo <htejun@gmail.com>]

Fix compile warnings in pata_cs5530, sata_inic162x and sata_nv which
are caused by throwing away return values marked with __must_check.

Signed-off-by: Tejun Heo <htejun@gmail.com>
---
 drivers/ata/libata-sff.c    |   10 +++++++---
 drivers/ata/pata_cs5530.c   |    6 +++++-
 drivers/ata/sata_inic162x.c |    4 +++-
 drivers/ata/sata_nv.c       |    5 ++++-
 4 files changed, 19 insertions(+), 6 deletions(-)

diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 69a5910..c7acbe9 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -1096,12 +1096,16 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
 		} else
 			legacy_mode |= ATA_PORT_SECONDARY;
 
+		/* For backward-compatibility reasons, we don't care
+		 * whether the followings succeed or fail.  Throw away
+		 * return value explicitly to override __must_check.
+		 */
 		if (legacy_mode & ATA_PORT_PRIMARY)
-			pci_request_region(pdev, 1, DRV_NAME);
+			rc = pci_request_region(pdev, 1, DRV_NAME);
 		if (legacy_mode & ATA_PORT_SECONDARY)
-			pci_request_region(pdev, 3, DRV_NAME);
+			rc = pci_request_region(pdev, 3, DRV_NAME);
 		/* If there is a DMA resource, allocate it */
-		pci_request_region(pdev, 4, DRV_NAME);
+		rc = pci_request_region(pdev, 4, DRV_NAME);
 	}
 
 	/* we have legacy mode, but all ports are unavailable */
diff --git a/drivers/ata/pata_cs5530.c b/drivers/ata/pata_cs5530.c
index 611d90f..d0e542c 100644
--- a/drivers/ata/pata_cs5530.c
+++ b/drivers/ata/pata_cs5530.c
@@ -251,6 +251,7 @@ static int cs5530_is_palmax(void)
 static int cs5530_init_chip(void)
 {
 	struct pci_dev *master_0 = NULL, *cs5530_0 = NULL, *dev = NULL;
+	int rc;
 
 	while ((dev = pci_get_device(PCI_VENDOR_ID_CYRIX, PCI_ANY_ID, dev)) != NULL) {
 		switch (dev->device) {
@@ -272,7 +273,10 @@ static int cs5530_init_chip(void)
 	}
 
 	pci_set_master(cs5530_0);
-	pci_set_mwi(cs5530_0);
+	rc = pci_set_mwi(cs5530_0);
+	if (rc)
+		dev_printk(KERN_WARNING, &cs5530_0->dev,
+			   "WARNING: failed to set MWI\n");
 
 	/*
 	 * Set PCI CacheLineSize to 16-bytes:
diff --git a/drivers/ata/sata_inic162x.c b/drivers/ata/sata_inic162x.c
index b67817e..6cd1fe9 100644
--- a/drivers/ata/sata_inic162x.c
+++ b/drivers/ata/sata_inic162x.c
@@ -649,7 +649,9 @@ static int inic_pci_device_resume(struct pci_dev *pdev)
 	void __iomem *mmio_base = host->mmio_base;
 	int rc;
 
-	ata_pci_device_do_resume(pdev);
+	rc = ata_pci_device_do_resume(pdev);
+	if (rc)
+		return rc;
 
 	if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) {
 		printk("XXX\n");
diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c
index cc10e43..9d8db97 100644
--- a/drivers/ata/sata_nv.c
+++ b/drivers/ata/sata_nv.c
@@ -1554,8 +1554,11 @@ static int nv_pci_device_resume(struct pci_dev *pdev)
 {
 	struct ata_host *host = dev_get_drvdata(&pdev->dev);
 	struct nv_host_priv *hpriv = host->private_data;
+	int rc;
 
-	ata_pci_device_do_resume(pdev);
+	rc = ata_pci_device_do_resume(pdev);
+	if (rc)
+		return rc;
 
 	if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) {
 		if(hpriv->type >= CK804) {
-- 
1.4.4.3