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| author | Sricharan R <sricharan@codeaurora.org> | 2017-05-27 19:17:45 +0530 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2017-05-30 11:31:34 +0200 |
| commit | d3e01c51598b2639a4830549058500e5f2ace86f (patch) | |
| tree | 31bdac18b9cb52433593cdab08a1e46a9d5c801e /Documentation/kbuild | |
| parent | 4dac3210c54a04be9c187dd31b4debb46e3d792b (diff) | |
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: 09515ef5ddad ("of/acpi: Configure dma operations at probe time for platform/amba/pci bus devices")
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sricharan R <sricharan@codeaurora.org>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'Documentation/kbuild')
0 files changed, 0 insertions, 0 deletions