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memory: tegra: Do not handle spurious interrupts

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The ISR reads interrupts-enable mask, but doesn't utilize it. Apply the
mask to the interrupt status and don't handle interrupts that MC driver
haven't asked for. Kernel would disable spurious MC IRQ and report the
error. This would happen only in a case of a very severe bug.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Dmitry Osipenko 2018-04-09 22:28:27 +03:00 • committed by Thierry Reding
parent 5c8d08f347
commit bf3fbdfbec
1 changed files with 4 additions and 1 deletions
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5
drivers/memory/tegra/mc.c
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@ -252,8 +252,11 @@ static irqreturn_t tegra_mc_irq(int irq, void *data)
unsigned int bit;
/* mask all interrupts to avoid flooding */
status = mc_readl(mc, MC_INTSTATUS);
mask = mc_readl(mc, MC_INTMASK);
status = mc_readl(mc, MC_INTSTATUS) & mask;
if (!status)
return IRQ_NONE;
for_each_set_bit(bit, &status, 32) {
const char *error = status_names[bit] ?: "unknown";