Messages in this thread Patch in this message | | | From | Jerry Snitselaar <> | Subject | [PATCH] iommu: Don't attach deferred device in iommu_group_do_dma_attach | Date | Thu, 4 Jun 2020 00:31:42 -0700 |
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Attaching a deferred device should be delayed until dma api is called.
Cc: iommu@lists.linux-foundation.org Suggested-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Jerry Snitselaar <jsnitsel@redhat.com> --- If you already have thrown a patch together, then ignore this. Also feel free to swap out the signed-off-by with your's since this is more your patch than mine. You can put a reviewed-by and tested-by instead for me.
drivers/iommu/iommu.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index b5ea203f6c68..d43120eb1dc5 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -1680,8 +1680,12 @@ static void probe_alloc_default_domain(struct bus_type *bus, static int iommu_group_do_dma_attach(struct device *dev, void *data) { struct iommu_domain *domain = data; + int ret = 0; - return __iommu_attach_device(domain, dev); + if (!iommu_is_attach_deferred(domain, dev)) + ret = __iommu_attach_device(domain, dev); + + return ret; } static int __iommu_group_dma_attach(struct iommu_group *group) -- 2.24.0
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