Commit 1d27704a authored Mar 06, 2015 by Yun Wu Committed by Jason Cooper Mar 08, 2015

irqchip: gicv3-its: Add limitation to page order



When required size of Device Table is out of the page allocator's
capability, the whole ITS will fail in probing. This actually is
not the hardware's problem and is mainly a limitation of the kernel
page allocator. This patch will keep ITS going on to the next
initializaion stage with an explicit warning.

Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Yun Wu <wuyun.wu@huawei.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Link: https://lkml.kernel.org/r/1425659870-11832-10-git-send-email-marc.zyngier@arm.com


Signed-off-by: Jason Cooper <jason@lakedaemon.net>

parent 790b57ae

drivers/irqchip/irq-gic-v3-its.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -828,6 +828,11 @@ static int its_alloc_tables(struct its_node *its)
		u32 ids = GITS_TYPER_DEVBITS(typer);

		order = get_order((1UL << ids) * entry_size);
		if (order >= MAX_ORDER) {
		order = MAX_ORDER - 1;
		pr_warn("%s: Device Table too large, reduce its page order to %u\n",
		its->msi_chip.of_node->full_name, order);
		}
		}

		alloc_size = (1 << order) * PAGE_SIZE;