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authorJulia Lawall <Julia.Lawall@lip6.fr>2012-03-08 23:24:53 -0500
committerChris Ball <cjb@laptop.org>2012-04-05 20:32:16 -0400
commit9bda6da7ff7d35ef757e235aae559e679d3a9493 (patch)
treefb2e3eeb8d6175d6f82aa6a9de376a10d2f3b0a4 /drivers/mmc
parent1d4dc338bb7cbbadcb5a527b1b0e897b5cde1701 (diff)
downloadop-kernel-dev-9bda6da7ff7d35ef757e235aae559e679d3a9493.zip
op-kernel-dev-9bda6da7ff7d35ef757e235aae559e679d3a9493.tar.gz
mmc: sdhci-s3c: use devm_ functions
The various devm_ functions allocate memory that is released when a driver detaches. This patch uses these functions for data that is allocated in the probe function of a platform device and is only freed in the remove function. By using devm_ioremap, it also removes a potential memory leak, because there was no call to iounmap in the probe function. The call to platform_get_resource was moved just to make it closer to the place where its result it used. Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/sdhci-s3c.c27
1 files changed, 3 insertions, 24 deletions
diff --git a/drivers/mmc/host/sdhci-s3c.c b/drivers/mmc/host/sdhci-s3c.c
index e81a033..c3144cb 100644
--- a/drivers/mmc/host/sdhci-s3c.c
+++ b/drivers/mmc/host/sdhci-s3c.c
@@ -443,12 +443,6 @@ static int __devinit sdhci_s3c_probe(struct platform_device *pdev)
return irq;
}
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- dev_err(dev, "no memory specified\n");
- return -ENOENT;
- }
-
host = sdhci_alloc_host(dev, sizeof(struct sdhci_s3c));
if (IS_ERR(host)) {
dev_err(dev, "sdhci_alloc_host() failed\n");
@@ -513,15 +507,8 @@ static int __devinit sdhci_s3c_probe(struct platform_device *pdev)
goto err_no_busclks;
}
- sc->ioarea = request_mem_region(res->start, resource_size(res),
- mmc_hostname(host->mmc));
- if (!sc->ioarea) {
- dev_err(dev, "failed to reserve register area\n");
- ret = -ENXIO;
- goto err_req_regs;
- }
-
- host->ioaddr = ioremap_nocache(res->start, resource_size(res));
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ host->ioaddr = devm_request_and_ioremap(&pdev->dev, res);
if (!host->ioaddr) {
dev_err(dev, "failed to map registers\n");
ret = -ENXIO;
@@ -606,7 +593,7 @@ static int __devinit sdhci_s3c_probe(struct platform_device *pdev)
ret = sdhci_add_host(host);
if (ret) {
dev_err(dev, "sdhci_add_host() failed\n");
- goto err_add_host;
+ goto err_req_regs;
}
/* The following two methods of card detection might call
@@ -620,10 +607,6 @@ static int __devinit sdhci_s3c_probe(struct platform_device *pdev)
return 0;
- err_add_host:
- release_resource(sc->ioarea);
- kfree(sc->ioarea);
-
err_req_regs:
for (ptr = 0; ptr < MAX_BUS_CLK; ptr++) {
if (sc->clk_bus[ptr]) {
@@ -669,10 +652,6 @@ static int __devexit sdhci_s3c_remove(struct platform_device *pdev)
clk_disable(sc->clk_io);
clk_put(sc->clk_io);
- iounmap(host->ioaddr);
- release_resource(sc->ioarea);
- kfree(sc->ioarea);
-
sdhci_free_host(host);
platform_set_drvdata(pdev, NULL);
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