diff options
| author | Robin Murphy <robin.murphy@arm.com> | 2019-11-11 21:55:18 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2019-11-12 19:07:47 +0300 |
| commit | 5b47748ecf2e3b7e346d6ce136e1c57239f995b0 (patch) | |
| tree | bf2154407d2a42c61defaf8777742ca656907243 | |
| parent | 42bb97b80f2e3bf592e3e99d109b67309aa1b30e (diff) | |
| download | linux-5b47748ecf2e3b7e346d6ce136e1c57239f995b0.tar.xz | |
iommu/rockchip: Don't provoke WARN for harmless IRQs
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>
| -rw-r--r-- | drivers/iommu/rockchip-iommu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c index e845bd01a1a2..9be032236a03 100644 --- a/drivers/iommu/rockchip-iommu.c +++ b/drivers/iommu/rockchip-iommu.c @@ -526,7 +526,7 @@ static irqreturn_t rk_iommu_irq(int irq, void *dev_id) int i, err; err = pm_runtime_get_if_in_use(iommu->dev); - if (WARN_ON_ONCE(err <= 0)) + if (!err || WARN_ON_ONCE(err < 0)) return ret; if (WARN_ON(clk_bulk_enable(iommu->num_clocks, iommu->clocks))) |