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Commit d3e01c51 authored by Sricharan R's avatar Sricharan R Committed by Joerg Roedel
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arm: dma-mapping: Reset the device's dma_ops



arch_teardown_dma_ops() being the inverse of arch_setup_dma_ops()
,dma_ops should be cleared in the teardown path. Currently, only the
device's iommu mapping structures are cleared in arch_teardown_dma_ops,
but not the dma_ops. So on the next reprobe, dma_ops left in place is
stale from the first IOMMU setup, but iommu mappings has been disposed
of. This is a problem when the probe of the device is deferred and
recalled with the IOMMU probe deferral.

So for fixing this, slightly refactor by moving the code from
__arm_iommu_detach_device to arm_iommu_detach_device and cleanup
the former. This takes care of resetting the dma_ops in the teardown
path.

Fixes: 09515ef5 ("of/acpi: Configure dma operations at probe time for platform/amba/pci bus devices")
Reviewed-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: default avatarSricharan R <sricharan@codeaurora.org>
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 4dac3210
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