Commit 3ad2a5f5 authored May 20, 2015 by Minghuan Lian Committed by Thomas Gleixner May 20, 2015

irqchip/gicv3-its: ITS table size should not be smaller than PSZ



When allocating a device table, if the requested allocation is smaller
than the default granule size of the ITS then, we need to round up to
the default size.

Signed-off-by: Minghuan Lian <Minghuan.Lian@freescale.com>
[ stuart: Added comments and massaged changelog ]
Signed-off-by: Stuart Yoder <stuart.yoder@freescale.com>
Reviewed-by: Marc Zygnier <marc.zyngier@arm.com>
Cc: <linux-arm-kernel@lists.infradead.org>
Cc: <jason@lakedaemon.net>
Link: http://lkml.kernel.org/r/1432134795-661-1-git-send-email-stuart.yoder@freescale.com


Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

parent e2608180

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

+8 −1

Original line number	Diff line number	Diff line
		@@ -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",