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memory: tegra20-mc: Fix hang in IRQ handler.

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In Tegra20 any memory controller interrupt would cause an
infinite loop in the IRQ handler.

Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tuomas Tynkkynen 2013-06-11 13:11:18 +03:00 committed by Greg Kroah-Hartman
parent 2c9b48ac3c
commit d777f98bfa
1 changed files with 4 additions and 1 deletions
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5
drivers/memory/tegra20-mc.c
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@ -193,8 +193,11 @@ static irqreturn_t tegra20_mc_isr(int irq, void *data)
mask &= stat;
if (!mask)
return IRQ_NONE;
while ((bit = ffs(mask)) != 0)
while ((bit = ffs(mask)) != 0) {
tegra20_mc_decode(mc, bit - 1);
mask &= ~BIT(bit - 1);
}
mc_writel(mc, stat, MC_INTSTATUS);
return IRQ_HANDLED;
}