Commit 423869f8 authored Jan 29, 2019 by Marc Zyngier Committed by Greg Kroah-Hartman Mar 13, 2019

irqchip/gic-v3-its: Gracefully fail on LPI exhaustion



[ Upstream commit 45725e0fc3e7fe52fedb94f59806ec50e9618682 ]

In the unlikely event that we cannot find any available LPI in the
system, we should gracefully return an error instead of carrying
on with no LPI allocated at all.

Fixes: 38dd7c49 ("irqchip/gic-v3-its: Drop chunk allocation compatibility")
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

parent dc81cfaf

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

+3 −0

Original line number	Diff line number	Diff line
		@@ -1581,6 +1581,9 @@ static unsigned long its_lpi_alloc(int nr_irqs, u32 base, int *nr_ids)
		nr_irqs /= 2;
		} while (nr_irqs > 0);

		if (!nr_irqs)
		err = -ENOSPC;

		if (err)
		goto out;