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-rw-r--r--drivers/irqchip/irq-gic-v3-its.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index 9687f8afebff..1b7e155869f6 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -828,7 +828,14 @@ static int its_alloc_tables(struct its_node *its)
u64 typer = readq_relaxed(its->base + GITS_TYPER);
u32 ids = GITS_TYPER_DEVBITS(typer);
- order = get_order((1UL << ids) * entry_size);
+ /*
+ * 'order' was initialized earlier to the default page
+ * granule of the the ITS. We can't have an allocation
+ * smaller than that. If the requested allocation
+ * is smaller, round up to the default page granule.
+ */
+ order = max(get_order((1UL << ids) * entry_size),
+ order);
if (order >= MAX_ORDER) {
order = MAX_ORDER - 1;
pr_warn("%s: Device Table too large, reduce its page order to %u\n",