iommu/rockchip: Free irqs in shutdown handler

[ Upstream commit 74bc2abca7603c956d1e331e8b9bee7b874c1eec ]

In the iommu's shutdown handler we disable runtime-pm which could
result in the irq-handler running unclocked and since commit
    3fc7c5c0cff3 ("iommu/rockchip: Handle errors returned from PM framework")
we warn about that fact.

This can cause warnings on shutdown on some Rockchip machines, so
free the irqs in the shutdown handler before we disable runtime-pm.

Reported-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Fixes: 3fc7c5c0cff3 ("iommu/rockchip: Handle errors returned from PM framework")
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c
index 2b1724e8d307cce6c71ae43063022b2d072c43a0..701820b39fd1fb7f8b89b076c3f8cea11256caae 100644 (file)
--- a/drivers/iommu/rockchip-iommu.c
+++ b/drivers/iommu/rockchip-iommu.c
@@ -1242,6 +1242,12 @@ err_unprepare_clocks:
 
 static void rk_iommu_shutdown(struct platform_device *pdev)
 {
+       struct rk_iommu *iommu = platform_get_drvdata(pdev);
+       int i = 0, irq;
+
+       while ((irq = platform_get_irq(pdev, i++)) != -ENXIO)
+               devm_free_irq(iommu->dev, irq, iommu);
+
        pm_runtime_force_suspend(&pdev->dev);
 }