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| author | Tuomas Tynkkynen <ttynkkynen@nvidia.com> | 2013-06-11 12:11:18 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-06-18 01:46:06 +0200 |
| commit | d777f98bfa44e5a2748603276e9e9fb6ab999079 (patch) | |
| tree | 8119f2c7bedcde23d3d17d94db068a713ab20bdf | |
| parent | mei: support HBM versioning (diff) | |
| download | linux-d777f98bfa44e5a2748603276e9e9fb6ab999079.tar.xz linux-d777f98bfa44e5a2748603276e9e9fb6ab999079.zip | |
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 <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>
| -rw-r--r-- | drivers/memory/tegra20-mc.c | 5 |
1 files changed, 4 insertions, 1 deletions
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; } |