soc/tegra: pmc: Fail to allocate more than one wake IRQ

The code currently doesn't support allocating more than one wake IRQ at
a time. Detect this situation and error out. Also make sure to output a
warning when that happens to help track down callers.

Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c
index 5648e5c09ef5476a92d5ed2613c20b9b9777a348..653fe2c466f631a1661b3991e2c9c51a3469b8f5 100644 (file)
--- a/drivers/soc/tegra/pmc.c
+++ b/drivers/soc/tegra/pmc.c
@@ -1863,6 +1863,9 @@ static int tegra_pmc_irq_alloc(struct irq_domain *domain, unsigned int virq,
        unsigned int i;
        int err = 0;
 
+       if (WARN_ON(num_irqs > 1))
+               return -EINVAL;
+
        for (i = 0; i < soc->num_wake_events; i++) {
                const struct tegra_wake_event *event = &soc->wake_events[i];