iommu/rockchip: Don't provoke WARN for harmless IRQs

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Although we don't generally expect IRQs to fire for a suspended IOMMU,
there are certain situations (particularly with debug options) where
we might legitimately end up with the pm_runtime_get_if_in_use() call
from rk_iommu_irq() returning 0. Since this doesn't represent an actual
error, follow the other parts of the driver and save the WARN_ON()
condition for a genuine negative value. Even if we do have spurious
IRQs due to a wedged VOP asserting the shared line, it's not this
driver's job to try to second-guess the IRQ core to warn about that.

Reported-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Robin Murphy 2019-11-11 18:55:18 +00:00 • committed by Joerg Roedel

parent 42bb97b80f

commit 5b47748ecf

1 changed files with 1 additions and 1 deletions

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drivers/iommu/rockchip-iommu.c

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