From: Julia Lawall <julia.lawall@xxxxxxx>
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.
Signed-off-by: Julia Lawall <julia.lawall@xxxxxxx>
---
sound/soc/au1x/ac97c.c | 40 +++++++++++++---------------------------
1 file changed, 13 insertions(+), 27 deletions(-)
diff --git a/sound/soc/au1x/ac97c.c b/sound/soc/au1x/ac97c.c
index 7771934..c5ac244 100644
--- a/sound/soc/au1x/ac97c.c
+++ b/sound/soc/au1x/ac97c.c
@@ -229,35 +229,34 @@ static int __devinit au1xac97c_drvprobe(struct platform_device *pdev)
struct resource *iores, *dmares;
struct au1xpsc_audio_data *ctx;
- ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+ ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
mutex_init(&ctx->lock);
iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!iores) {
- ret = -ENODEV;
- goto out0;
- }
+ if (!iores)
+ return -ENODEV;
- ret = -EBUSY;
- if (!request_mem_region(iores->start, resource_size(iores),
- pdev->name))
- goto out0;
+ if (!devm_request_mem_region(&pdev->dev, iores->start,
+ resource_size(iores),
+ pdev->name))
+ return -EBUSY;
- ctx->mmio = ioremap_nocache(iores->start, resource_size(iores));
+ ctx->mmio = devm_ioremap_nocache(&pdev->dev, iores->start,
+ resource_size(iores));
if (!ctx->mmio)
- goto out1;
+ return -EBUSY;
dmares = platform_get_resource(pdev, IORESOURCE_DMA, 0);
if (!dmares)
- goto out2;
+ return -EBUSY;
ctx->dmaids[SNDRV_PCM_STREAM_PLAYBACK] = dmares->start;
dmares = platform_get_resource(pdev, IORESOURCE_DMA, 1);
if (!dmares)
- goto out2;
+ return -EBUSY;
ctx->dmaids[SNDRV_PCM_STREAM_CAPTURE] = dmares->start;
/* switch it on */
@@ -271,33 +270,20 @@ static int __devinit au1xac97c_drvprobe(struct platform_device *pdev)
ret = snd_soc_register_dai(&pdev->dev, &au1xac97c_dai_driver);
if (ret)
- goto out2;
+ return ret;
ac97c_workdata = ctx;
return 0;
-
-out2:
- iounmap(ctx->mmio);
-out1:
- release_mem_region(iores->start, resource_size(iores));
-out0:
- kfree(ctx);
- return ret;
}
static int __devexit au1xac97c_drvremove(struct platform_device *pdev)
{
struct au1xpsc_audio_data *ctx = platform_get_drvdata(pdev);
- struct resource *r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
snd_soc_unregister_dai(&pdev->dev);
WR(ctx, AC97_ENABLE, EN_D); /* clock off, disable */
- iounmap(ctx->mmio);
- release_mem_region(r->start, resource_size(r));
- kfree(ctx);
-
ac97c_workdata = NULL; /* MDEV */
return 0;
--
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