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mmc: sdhci-s3c: fix NULL ptr access in sdhci_s3c_remove

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commit 9320f7cbbd upstream.

If not all clocks have been defined in platform data, the driver will
cause a null pointer dereference when it is removed. This patch fixes
this issue.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Marek Szyprowski
2010-09-23 16:22:05 +02:00
committed by Greg Kroah-Hartman
parent f4fe0c68bc
commit ce6258fde2
1 changed files with 4 additions and 2 deletions
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6
drivers/mmc/host/sdhci-s3c.c
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@@ -379,8 +379,10 @@ static int __devexit sdhci_s3c_remove(struct platform_device *pdev)
sdhci_remove_host(host, 1);
for (ptr = 0; ptr < 3; ptr++) {
clk_disable(sc->clk_bus[ptr]);
clk_put(sc->clk_bus[ptr]);
if (sc->clk_bus[ptr]) {
clk_disable(sc->clk_bus[ptr]);
clk_put(sc->clk_bus[ptr]);
}
}
clk_disable(sc->clk_io);
clk_put(sc->clk_io);