From d777f98bfa44e5a2748603276e9e9fb6ab999079 Mon Sep 17 00:00:00 2001 From: Tuomas Tynkkynen Date: Tue, 11 Jun 2013 13:11:18 +0300 Subject: 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: Tuomas Tynkkynen Reviewed-by: Stephen Warren Reviewed-by: Thierry Reding Signed-off-by: Greg Kroah-Hartman --- drivers/memory/tegra20-mc.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'drivers/memory/tegra20-mc.c') diff --git a/drivers/memory/tegra20-mc.c b/drivers/memory/tegra20-mc.c index 2ca5f2814f4a..0548eeacd573 100644 --- a/drivers/memory/tegra20-mc.c +++ b/drivers/memory/tegra20-mc.c @@ -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; } -- cgit v1.2.3