Commit d777f98b authored by Tuomas Tynkkynen's avatar Tuomas Tynkkynen Committed by Greg Kroah-Hartman

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

In Tegra20 any memory controller interrupt would cause an
infinite loop in the IRQ handler.
Signed-off-by: default avatarTuomas Tynkkynen <ttynkkynen@nvidia.com>
Reviewed-by: default avatarStephen Warren <swarren@nvidia.com>
Reviewed-by: default avatarThierry Reding <thierry.reding@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 2c9b48ac
...@@ -193,8 +193,11 @@ static irqreturn_t tegra20_mc_isr(int irq, void *data) ...@@ -193,8 +193,11 @@ static irqreturn_t tegra20_mc_isr(int irq, void *data)
mask &= stat; mask &= stat;
if (!mask) if (!mask)
return IRQ_NONE; return IRQ_NONE;
while ((bit = ffs(mask)) != 0) while ((bit = ffs(mask)) != 0) {
tegra20_mc_decode(mc, bit - 1); tegra20_mc_decode(mc, bit - 1);
mask &= ~BIT(bit - 1);
}
mc_writel(mc, stat, MC_INTSTATUS); mc_writel(mc, stat, MC_INTSTATUS);
return IRQ_HANDLED; return IRQ_HANDLED;
} }
......
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