mmc: Convert to devm_ioremap_resource()

Convert all uses of devm_request_and_ioremap() to the newly introduced
devm_ioremap_resource() which provides more consistent error handling.

devm_ioremap_resource() provides its own error messages so all explicit
error messages can be removed from the failure code paths.
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Cc: Chris Ball <cjb@laptop.org>
Cc: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/mmc/host/dw_mmc-pltfm.c

@@ -10,6 +10,7 @@
  * (at your option) any later version.
  */
 
+#include <linux/err.h>
 #include <linux/interrupt.h>
 #include <linux/module.h>
 #include <linux/io.h>
@@ -46,9 +47,9 @@ int dw_mci_pltfm_register(struct platform_device *pdev,
 	host->dev = &pdev->dev;
 	host->irq_flags = 0;
 	host->pdata = pdev->dev.platform_data;
-	host->regs = devm_request_and_ioremap(&pdev->dev, regs);
-	if (!host->regs)
-		return -ENOMEM;
+	host->regs = devm_ioremap_resource(&pdev->dev, regs);
+	if (IS_ERR(host->regs))
+		return PTR_ERR(host->regs);
 
 	if (drv_data && drv_data->init) {
 		ret = drv_data->init(host);

drivers/mmc/host/mxs-mmc.c

@@ -614,9 +614,9 @@ static int mxs_mmc_probe(struct platform_device *pdev)
 	host = mmc_priv(mmc);
 	ssp = &host->ssp;
 	ssp->dev = &pdev->dev;
-	ssp->base = devm_request_and_ioremap(&pdev->dev, iores);
-	if (!ssp->base) {
-		ret = -EADDRNOTAVAIL;
+	ssp->base = devm_ioremap_resource(&pdev->dev, iores);
+	if (IS_ERR(ssp->base)) {
+		ret = PTR_ERR(ssp->base);
 		goto out_mmc_free;
 	}
 

drivers/mmc/host/sdhci-s3c.c

@@ -651,10 +651,9 @@ static int sdhci_s3c_probe(struct platform_device *pdev)
 #endif
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	host->ioaddr = devm_request_and_ioremap(&pdev->dev, res);
-	if (!host->ioaddr) {
-		dev_err(dev, "failed to map registers\n");
-		ret = -ENXIO;
+	host->ioaddr = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(host->ioaddr)) {
+		ret = PTR_ERR(host->ioaddr);
 		goto err_req_regs;
 	}