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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>
This commit is contained in:
Julia Lawall 2012-03-08 23:24:53 -05:00 коммит произвёл Chris Ball
Родитель 1d4dc338bb
Коммит 9bda6da7ff
1 изменённых файлов: 3 добавлений и 24 удалений
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27
drivers/mmc/host/sdhci-s3c.c
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@ -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);