[PATCH] mmc: vt8500: change resource-mapping to devm_*

[Helmut Stengele]

Current code calls release_mem_region upon module unload
without requesting the region first. This patch fixes it
by moving to a devres-based ioremap implementation, which
handles requesting and releasing memory region internally.

This also makes the error/unload paths a bit simpler.

Signed-off-by: Helmut Stengele <lautriv@xxxxxxxxxxxx>
---
 drivers/mmc/host/wmt-sdmmc.c |   16 +++++-----------
 1 file changed, 5 insertions(+), 11 deletions(-)

diff --git a/drivers/mmc/host/wmt-sdmmc.c b/drivers/mmc/host/wmt-sdmmc.c
index 54181b4..f874d36 100644
--- a/drivers/mmc/host/wmt-sdmmc.c
+++ b/drivers/mmc/host/wmt-sdmmc.c
@@ -759,6 +759,7 @@ static int wmt_mci_probe(struct platform_device *pdev)
 	const struct wmt_mci_caps *wmt_caps;
 	int ret;
 	int regular_irq, dma_irq;
+	struct resource *res;
 
 	if (!of_id || !of_id->data) {
 		dev_err(&pdev->dev, "Controller capabilities data missing\n");
@@ -813,10 +814,11 @@ static int wmt_mci_probe(struct platform_device *pdev)
 	if (of_get_property(np, "cd-inverted", NULL))
 		priv->cd_inverted = 1;
 
-	priv->sdmmc_base = of_iomap(np, 0);
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	priv->sdmmc_base = devm_ioremap_resource(&pdev->dev, res);
 	if (!priv->sdmmc_base) {
 		dev_err(&pdev->dev, "Failed to map IO space\n");
-		ret = -ENOMEM;
+		ret = PTR_ERR(priv->sdmmc_base);
 		goto fail2;
 	}
 
@@ -826,7 +828,7 @@ static int wmt_mci_probe(struct platform_device *pdev)
 	ret = request_irq(regular_irq, wmt_mci_regular_isr, 0, "sdmmc", priv);
 	if (ret) {
 		dev_err(&pdev->dev, "Register regular IRQ fail\n");
-		goto fail3;
+		goto fail2;
 	}
 
 	ret = request_irq(dma_irq, wmt_mci_dma_isr, 0, "sdmmc", priv);
@@ -869,8 +871,6 @@ fail5:
 	free_irq(dma_irq, priv);
 fail4:
 	free_irq(regular_irq, priv);
-fail3:
-	iounmap(priv->sdmmc_base);
 fail2:
 	mmc_free_host(mmc);
 fail1:
@@ -881,7 +881,6 @@ static int wmt_mci_remove(struct platform_device *pdev)
 {
 	struct mmc_host *mmc;
 	struct wmt_mci_priv *priv;
-	struct resource *res;
 	u32 reg_tmp;
 
 	mmc = platform_get_drvdata(pdev);
@@ -904,14 +903,9 @@ static int wmt_mci_remove(struct platform_device *pdev)
 	free_irq(priv->irq_regular, priv);
 	free_irq(priv->irq_dma, priv);
 
-	iounmap(priv->sdmmc_base);
-
 	clk_disable_unprepare(priv->clk_sdmmc);
 	clk_put(priv->clk_sdmmc);
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	release_mem_region(res->start, resource_size(res));
-
 	mmc_free_host(mmc);
 
 	dev_info(&pdev->dev, "WMT MCI device removed\n");
-- 
1.7.10.4


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