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authorJulia Lawall <julia@diku.dk>2011-10-18 17:06:39 +0200
committerMark Brown <broonie@opensource.wolfsonmicro.com>2011-10-22 10:46:35 +0100
commit226d0f22d044f0151287bb7cf334b85182248f0e (patch)
treec85786a71a405d3c1a1c0d96a685d460d9d649d5 /sound/soc/au1x/psc-i2s.c
parent33cb92cff9568dd9feb2825bd3605bf099bc6b63 (diff)
downloadop-kernel-dev-226d0f22d044f0151287bb7cf334b85182248f0e.zip
op-kernel-dev-226d0f22d044f0151287bb7cf334b85182248f0e.tar.gz
ASoC: keep pointer to resource so it can be freed
Add a new variable for storing resources accessed subsequent to the one accessed using request_mem_region, so the one accessed using request_mem_region can be released if needed. The resource variable names are also changed to be more descriptive. This code is also missing some calls to iounmap. The semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r@ expression E, E1; identifier f; statement S1,S2,S3; @@ if (E == NULL) { ... when != if (E == NULL || ...) S1 else S2 when != E = E1 *E->f ... when any return ...; } else S3 // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/au1x/psc-i2s.c')
-rw-r--r--sound/soc/au1x/psc-i2s.c25
1 files changed, 13 insertions, 12 deletions
diff --git a/sound/soc/au1x/psc-i2s.c b/sound/soc/au1x/psc-i2s.c
index 7c5ae92..e03c5ce 100644
--- a/sound/soc/au1x/psc-i2s.c
+++ b/sound/soc/au1x/psc-i2s.c
@@ -290,7 +290,7 @@ static const struct snd_soc_dai_driver au1xpsc_i2s_dai_template = {
static int __devinit au1xpsc_i2s_drvprobe(struct platform_device *pdev)
{
- struct resource *r;
+ struct resource *iores, *dmares;
unsigned long sel;
int ret;
struct au1xpsc_audio_data *wd;
@@ -299,29 +299,30 @@ static int __devinit au1xpsc_i2s_drvprobe(struct platform_device *pdev)
if (!wd)
return -ENOMEM;
- r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!r) {
+ iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!iores) {
ret = -ENODEV;
goto out0;
}
ret = -EBUSY;
- if (!request_mem_region(r->start, resource_size(r), pdev->name))
+ if (!request_mem_region(iores->start, resource_size(iores),
+ pdev->name))
goto out0;
- wd->mmio = ioremap(r->start, resource_size(r));
+ wd->mmio = ioremap(iores->start, resource_size(iores));
if (!wd->mmio)
goto out1;
- r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
- if (!r)
+ dmares = platform_get_resource(pdev, IORESOURCE_DMA, 0);
+ if (!dmares)
goto out2;
- wd->dmaids[SNDRV_PCM_STREAM_PLAYBACK] = r->start;
+ wd->dmaids[SNDRV_PCM_STREAM_PLAYBACK] = dmares->start;
- r = platform_get_resource(pdev, IORESOURCE_DMA, 1);
- if (!r)
+ dmares = platform_get_resource(pdev, IORESOURCE_DMA, 1);
+ if (!dmares)
goto out2;
- wd->dmaids[SNDRV_PCM_STREAM_CAPTURE] = r->start;
+ wd->dmaids[SNDRV_PCM_STREAM_CAPTURE] = dmares->start;
/* preserve PSC clock source set up by platform (dev.platform_data
* is already occupied by soc layer)
@@ -355,7 +356,7 @@ static int __devinit au1xpsc_i2s_drvprobe(struct platform_device *pdev)
out2:
iounmap(wd->mmio);
out1:
- release_mem_region(r->start, resource_size(r));
+ release_mem_region(iores->start, resource_size(iores));
out0:
kfree(wd);
return ret;
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