Commit a33bf8d8 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

iommu: Restore iommu_flush_iotlb_all() 



This patch restores the iommu_flush_iotlb_all() function.
Commit

	69e5a175 ("iommu: Remove useless flush from iommu_create_device_direct_mappings()")

claims it removed the last call-site, except it did not. There is still
at least one caller in

	drivers/gpu/drm/msm/msm_iommu.c

so keep the function around until all call-sites are updated.

Cc: Jason Gunthorpe <jgg@ziepe.ca>
Fixes: 69e5a175 ("iommu: Remove useless flush from iommu_create_device_direct_mappings()")
Acked-by: default avatarWill Deacon <will@kernel.org>
Reviewed-by: default avatarJason Gunthorpe <jgg@nvidia.com>
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent d14772c0

include/linux/iommu.h

+10 −0
Original line number Diff line number Diff line
@@ -853,6 +853,12 @@ void iommu_set_dma_strict(void); 
extern int report_iommu_fault(struct iommu_domain *domain, struct device *dev,

			      unsigned long iova, int flags);



static inline void iommu_flush_iotlb_all(struct iommu_domain *domain)

{

	if (domain->ops->flush_iotlb_all)

		domain->ops->flush_iotlb_all(domain);

}



static inline void iommu_iotlb_sync(struct iommu_domain *domain,

				  struct iommu_iotlb_gather *iotlb_gather)

{
@@ -1137,6 +1143,10 @@ static inline ssize_t iommu_map_sg(struct iommu_domain *domain, 
	return -ENODEV;

}



static inline void iommu_flush_iotlb_all(struct iommu_domain *domain)

{

}



static inline void iommu_iotlb_sync(struct iommu_domain *domain,

				  struct iommu_iotlb_gather *iotlb_gather)

{