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authorMarc Zyngier <marc.zyngier@arm.com>2019-01-29 15:19:23 +0000
committerMarc Zyngier <marc.zyngier@arm.com>2019-01-29 15:48:51 +0000
commit45725e0fc3e7fe52fedb94f59806ec50e9618682 (patch)
treecb491f1069fca17cfd03bdf93b8f34d7eda8c1ad /drivers/irqchip
parent9791ec7df0e7b4d80706ccea8f24b6542f6059e9 (diff)
downloadlinux-45725e0fc3e7fe52fedb94f59806ec50e9618682.tar.bz2
irqchip/gic-v3-its: Gracefully fail on LPI exhaustion
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: 38dd7c494cf6 ("irqchip/gic-v3-its: Drop chunk allocation compatibility") Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'drivers/irqchip')
-rw-r--r--drivers/irqchip/irq-gic-v3-its.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index f25ec92f23ee..c3aba3fc818d 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -1586,6 +1586,9 @@ 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;