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mmc: sdhci-s3c: fix incorrect spinlock usage after merge

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In the commit f522886e20 a merge conflict
in the sdhci-s3c driver been fixed. However the fix used incorrect
spinlock operation - it caused a race with sdhci interrupt service. The
correct way to solve it is to use spin_lock_irqsave/irqrestore() calls.

Signed-off-by: Marek Szyprowski <[email protected]>
Signed-off-by: Kyungmin Park <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Chris Ball <[email protected]>
This commit is contained in:
Marek Szyprowski 2010-09-20 15:03:42 +02:00 • committed by Chris Ball
commit 06fe577f84
1 changed files with 4 additions and 2 deletions
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6
drivers/mmc/host/sdhci-s3c.c
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@ -241,8 +241,10 @@ static struct sdhci_ops sdhci_s3c_ops = {
static void sdhci_s3c_notify_change(struct platform_device *dev, int state)
{
struct sdhci_host *host = platform_get_drvdata(dev);
unsigned long flags;
if (host) {
spin_lock(&host->lock);
spin_lock_irqsave(&host->lock, flags);
if (state) {
dev_dbg(&dev->dev, "card inserted.\n");
host->flags &= ~SDHCI_DEVICE_DEAD;
@ -253,7 +255,7 @@ static void sdhci_s3c_notify_change(struct platform_device *dev, int state)
host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
}
tasklet_schedule(&host->card_tasklet);
spin_unlock(&host->lock);
spin_unlock_irqrestore(&host->lock, flags);
}
}