linux-kernel - [PATCH] spi/omap: cleanup probe/remove routines

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Message-Id: <1335708021-31113-1-git-send-email-hannuxx@iki.fi>
Date:	Sun, 29 Apr 2012 17:00:21 +0300
From:	Hannu Heikkinen <hannuxx@....fi>
To:	linux-kernel@...r.kernel.org,
	spi-devel-general@...ts.sourceforge.net
Cc:	grant.likely@...retlab.ca, tony@...mide.com
Subject: [PATCH] spi/omap: cleanup probe/remove routines

Cleanup probe and remove routines, use devm_* functions for
managing resources.

Also, in under free_master label, change use of kfree() into
spi_master_put().

CC: tony@...mide.com
CC: grant.likely@...retlab.ca
Signed-off-by: Hannu Heikkinen <hannuxx@....fi>
---
 drivers/spi/spi-omap2-mcspi.c |   27 ++++++---------------------
 1 file changed, 6 insertions(+), 21 deletions(-)

diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c
index bb9274c..392efce 100644
--- a/drivers/spi/spi-omap2-mcspi.c
+++ b/drivers/spi/spi-omap2-mcspi.c
@@ -1166,17 +1166,12 @@ static int __init omap2_mcspi_probe(struct platform_device *pdev)
 	r->start += regs_offset;
 	r->end += regs_offset;
 	mcspi->phys = r->start;
-	if (!request_mem_region(r->start, resource_size(r),
-				dev_name(&pdev->dev))) {
-		status = -EBUSY;
-		goto free_master;
-	}
 
-	mcspi->base = ioremap(r->start, resource_size(r));
+	mcspi->base = devm_request_and_ioremap(&pdev->dev, r);
 	if (!mcspi->base) {
-		dev_dbg(&pdev->dev, "can't ioremap MCSPI\n");
-		status = -ENOMEM;
-		goto release_region;
+		dev_dbg(&pdev->dev, "can't request mem and ioremap MCSPI\n");
+		status =  -ENOMEM;
+		goto free_master;
 	}
 
 	mcspi->dev = &pdev->dev;
@@ -1191,7 +1186,7 @@ static int __init omap2_mcspi_probe(struct platform_device *pdev)
 			GFP_KERNEL);
 
 	if (mcspi->dma_channels == NULL)
-		goto unmap_io;
+		goto free_master;
 
 	for (i = 0; i < master->num_chipselect; i++) {
 		char dma_ch_name[14];
@@ -1241,12 +1236,8 @@ disable_pm:
 	pm_runtime_disable(&pdev->dev);
 dma_chnl_free:
 	kfree(mcspi->dma_channels);
-unmap_io:
-	iounmap(mcspi->base);
-release_region:
-	release_mem_region(r->start, resource_size(r));
 free_master:
-	kfree(master);
+	spi_master_put(master);
 	platform_set_drvdata(pdev, NULL);
 	return status;
 }
@@ -1256,8 +1247,6 @@ static int __exit omap2_mcspi_remove(struct platform_device *pdev)
 	struct spi_master	*master;
 	struct omap2_mcspi	*mcspi;
 	struct omap2_mcspi_dma	*dma_channels;
-	struct resource		*r;
-	void __iomem *base;
 
 	master = dev_get_drvdata(&pdev->dev);
 	mcspi = spi_master_get_devdata(master);
@@ -1265,12 +1254,8 @@ static int __exit omap2_mcspi_remove(struct platform_device *pdev)
 
 	omap2_mcspi_disable_clocks(mcspi);
 	pm_runtime_disable(&pdev->dev);
-	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	release_mem_region(r->start, resource_size(r));
 
-	base = mcspi->base;
 	spi_unregister_master(master);
-	iounmap(base);
 	kfree(dma_channels);
 	destroy_workqueue(mcspi->wq);
 	platform_set_drvdata(pdev, NULL);
-- 
1.7.10

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