[PATCH] ata:ahci_xgene:use devm_platform_ioremap_resource() to simplify code

[Tang Bin]

In this function, devm_platform_ioremap_resource() should be suitable
to simplify code.

Signed-off-by: Tang Bin <tangbin@xxxxxxxxxxxxxxxxxxxx>
---
 drivers/ata/ahci_xgene.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/drivers/ata/ahci_xgene.c b/drivers/ata/ahci_xgene.c
index 16246c843..061209275 100644
--- a/drivers/ata/ahci_xgene.c
+++ b/drivers/ata/ahci_xgene.c
@@ -739,7 +739,6 @@ static int xgene_ahci_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct ahci_host_priv *hpriv;
 	struct xgene_ahci_context *ctx;
-	struct resource *res;
 	const struct of_device_id *of_devid;
 	enum xgene_ahci_version version = XGENE_AHCI_V1;
 	const struct ata_port_info *ppi[] = { &xgene_ahci_v1_port_info,
@@ -759,32 +758,24 @@ static int xgene_ahci_probe(struct platform_device *pdev)
 	ctx->dev = dev;
 
 	/* Retrieve the IP core resource */
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-	ctx->csr_core = devm_ioremap_resource(dev, res);
+	ctx->csr_core = devm_platform_ioremap_resource(pdev, 1);
 	if (IS_ERR(ctx->csr_core))
 		return PTR_ERR(ctx->csr_core);
 
 	/* Retrieve the IP diagnostic resource */
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
-	ctx->csr_diag = devm_ioremap_resource(dev, res);
+	ctx->csr_diag = devm_platform_ioremap_resource(pdev, 2);
 	if (IS_ERR(ctx->csr_diag))
 		return PTR_ERR(ctx->csr_diag);
 
 	/* Retrieve the IP AXI resource */
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 3);
-	ctx->csr_axi = devm_ioremap_resource(dev, res);
+	ctx->csr_axi = devm_platform_ioremap_resource(pdev, 3);
 	if (IS_ERR(ctx->csr_axi))
 		return PTR_ERR(ctx->csr_axi);
 
 	/* Retrieve the optional IP mux resource */
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 4);
-	if (res) {
-		void __iomem *csr = devm_ioremap_resource(dev, res);
-		if (IS_ERR(csr))
-			return PTR_ERR(csr);
-
-		ctx->csr_mux = csr;
-	}
+	ctx->csr_mux = devm_platform_ioremap_resource(pdev, 4);
+	if (IS_ERR(ctx->csr_mux))
+		return PTR_ERR(ctx->csr_mux);
 
 	of_devid = of_match_device(xgene_ahci_of_match, dev);
 	if (of_devid) {
-- 
2.20.1.windows.1