ASoC: davinci-i2s.c: use devm_ functions

The various devm_ functions allocate memory that is released when a driver
detaches.  This patch uses devm_kzalloc, devm_request_mem_region and
devm_ioremap for data that is allocated in the probe function of a platform
device and is only freed in the remove function.

In this case, the original code did not contain a call to iounmap, nor does
one appear anywhere else in the file.  I have assumed that it is safe to
use devm_ioremap for the allocation in any case.

Signed-off-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 13 insertions, 26 deletions

diff --git a/sound/soc/davinci/davinci-i2s.c b/sound/soc/davinci/davinci-i2s.c
index ec187100367e..0a74b9587a2c 100644
--- a/sound/soc/davinci/davinci-i2s.c
+++ b/sound/soc/davinci/davinci-i2s.c
@@ -661,18 +661,18 @@ static int davinci_i2s_probe(struct platform_device *pdev)
                 return -ENODEV;
         }
 
-        ioarea = request_mem_region(mem->start, resource_size(mem),
-                                    pdev->name);
+        ioarea = devm_request_mem_region(&pdev->dev, mem->start,
+                                         resource_size(mem),
+                                         pdev->name);
         if (!ioarea) {
                 dev_err(&pdev->dev, "McBSP region already claimed\n");
                 return -EBUSY;
         }
 
-        dev = kzalloc(sizeof(struct davinci_mcbsp_dev), GFP_KERNEL);
-        if (!dev) {
-                ret = -ENOMEM;
-                goto err_release_region;
-        }
+        dev = devm_kzalloc(&pdev->dev, sizeof(struct davinci_mcbsp_dev),
+                           GFP_KERNEL);
+        if (!dev)
+                return -ENOMEM;
         if (pdata) {
                 dev->enable_channel_combine = pdata->enable_channel_combine;
                 dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK].sram_size =
@@ -691,13 +691,11 @@ static int davinci_i2s_probe(struct platform_device *pdev)
         dev->dma_params[SNDRV_PCM_STREAM_CAPTURE].ram_chan_q    = ram_chan_q;
 
         dev->clk = clk_get(&pdev->dev, NULL);
-        if (IS_ERR(dev->clk)) {
-                ret = -ENODEV;
-                goto err_free_mem;
-        }
+        if (IS_ERR(dev->clk))
+                return -ENODEV;
         clk_enable(dev->clk);
 
-        dev->base = ioremap(mem->start, resource_size(mem));
+        dev->base = devm_ioremap(&pdev->dev, mem->start, resource_size(mem));
         if (!dev->base) {
                 dev_err(&pdev->dev, "ioremap failed\n");
                 ret = -ENOMEM;
@@ -715,7 +713,7 @@ static int davinci_i2s_probe(struct platform_device *pdev)
         if (!res) {
                 dev_err(&pdev->dev, "no DMA resource\n");
                 ret = -ENXIO;
-                goto err_iounmap;
+                goto err_release_clk;
         }
         dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK].channel = res->start;
 
@@ -723,7 +721,7 @@ static int davinci_i2s_probe(struct platform_device *pdev)
         if (!res) {
                 dev_err(&pdev->dev, "no DMA resource\n");
                 ret = -ENXIO;
-                goto err_iounmap;
+                goto err_release_clk;
         }
         dev->dma_params[SNDRV_PCM_STREAM_CAPTURE].channel = res->start;
         dev->dev = &pdev->dev;
@@ -732,35 +730,24 @@ static int davinci_i2s_probe(struct platform_device *pdev)
 
         ret = snd_soc_register_dai(&pdev->dev, &davinci_i2s_dai);
         if (ret != 0)
-                goto err_iounmap;
+                goto err_release_clk;
 
         return 0;
 
-err_iounmap:
-        iounmap(dev->base);
 err_release_clk:
         clk_disable(dev->clk);
         clk_put(dev->clk);
-err_free_mem:
-        kfree(dev);
-err_release_region:
-        release_mem_region(mem->start, resource_size(mem));
-
         return ret;
 }
 
 static int davinci_i2s_remove(struct platform_device *pdev)
 {
         struct davinci_mcbsp_dev *dev = dev_get_drvdata(&pdev->dev);
-        struct resource *mem;
 
         snd_soc_unregister_dai(&pdev->dev);
         clk_disable(dev->clk);
         clk_put(dev->clk);
         dev->clk = NULL;
-        kfree(dev);
-        mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-        release_mem_region(mem->start, resource_size(mem));
 
         return 0;
 }