ext4: fix lost truncate due to race with writeback

[~andy/linux] / drivers / mfd / davinci_voicecodec.c

diff --git a/drivers/mfd/davinci_voicecodec.c b/drivers/mfd/davinci_voicecodec.c
index c60ab0c3c4db3318e398487a9988e0f8b0eb5949..fb64398506e9934725bba33d9b3dabe0e9b591fc 100644 (file)
--- a/drivers/mfd/davinci_voicecodec.c
+++ b/drivers/mfd/davinci_voicecodec.c
@@ -46,56 +46,39 @@ void davinci_vc_write(struct davinci_vc *davinci_vc,
 static int __init davinci_vc_probe(struct platform_device *pdev)
 {
        struct davinci_vc *davinci_vc;
-       struct resource *res, *mem;
+       struct resource *res;
        struct mfd_cell *cell = NULL;
        int ret;
 
-       davinci_vc = kzalloc(sizeof(struct davinci_vc), GFP_KERNEL);
+       davinci_vc = devm_kzalloc(&pdev->dev,
+                                 sizeof(struct davinci_vc), GFP_KERNEL);
        if (!davinci_vc) {
                dev_dbg(&pdev->dev,
                            "could not allocate memory for private data\n");
                return -ENOMEM;
        }
 
-       davinci_vc->clk = clk_get(&pdev->dev, NULL);
+       davinci_vc->clk = devm_clk_get(&pdev->dev, NULL);
        if (IS_ERR(davinci_vc->clk)) {
                dev_dbg(&pdev->dev,
                            "could not get the clock for voice codec\n");
-               ret = -ENODEV;
-               goto fail1;
+               return -ENODEV;
        }
        clk_enable(davinci_vc->clk);
 
        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-       if (!res) {
-               dev_err(&pdev->dev, "no mem resource\n");
-               ret = -ENODEV;
-               goto fail2;
-       }
 
-       davinci_vc->pbase = res->start;
-       davinci_vc->base_size = resource_size(res);
-
-       mem = request_mem_region(davinci_vc->pbase, davinci_vc->base_size,
-                                pdev->name);
-       if (!mem) {
-               dev_err(&pdev->dev, "VCIF region already claimed\n");
-               ret = -EBUSY;
-               goto fail2;
-       }
-
-       davinci_vc->base = ioremap(davinci_vc->pbase, davinci_vc->base_size);
-       if (!davinci_vc->base) {
-               dev_err(&pdev->dev, "can't ioremap mem resource.\n");
-               ret = -ENOMEM;
-               goto fail3;
+       davinci_vc->base = devm_ioremap_resource(&pdev->dev, res);
+       if (IS_ERR(davinci_vc->base)) {
+               ret = PTR_ERR(davinci_vc->base);
+               goto fail;
        }
 
        res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
        if (!res) {
                dev_err(&pdev->dev, "no DMA resource\n");
                ret = -ENXIO;
-               goto fail4;
+               goto fail;
        }
 
        davinci_vc->davinci_vcif.dma_tx_channel = res->start;
@@ -106,7 +89,7 @@ static int __init davinci_vc_probe(struct platform_device *pdev)
        if (!res) {
                dev_err(&pdev->dev, "no DMA resource\n");
                ret = -ENXIO;
-               goto fail4;
+               goto fail;
        }
 
        davinci_vc->davinci_vcif.dma_rx_channel = res->start;
@@ -132,21 +115,13 @@ static int __init davinci_vc_probe(struct platform_device *pdev)
                              DAVINCI_VC_CELLS, NULL, 0, NULL);
        if (ret != 0) {
                dev_err(&pdev->dev, "fail to register client devices\n");
-               goto fail4;
+               goto fail;
        }
 
        return 0;
 
-fail4:
-       iounmap(davinci_vc->base);
-fail3:
-       release_mem_region(davinci_vc->pbase, davinci_vc->base_size);
-fail2:
+fail:
        clk_disable(davinci_vc->clk);
-       clk_put(davinci_vc->clk);
-       davinci_vc->clk = NULL;
-fail1:
-       kfree(davinci_vc);
 
        return ret;
 }
@@ -157,14 +132,7 @@ static int davinci_vc_remove(struct platform_device *pdev)
 
        mfd_remove_devices(&pdev->dev);
 
-       iounmap(davinci_vc->base);
-       release_mem_region(davinci_vc->pbase, davinci_vc->base_size);
-
        clk_disable(davinci_vc->clk);
-       clk_put(davinci_vc->clk);
-       davinci_vc->clk = NULL;
-
-       kfree(davinci_vc);
 
        return 0;
 }