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Subject[PATCH v4 5/7] iommu/io-pgtable: Allow io_pgtable_tlb ops optional
Date
This patch allows io_pgtable_tlb ops could be null since the IOMMU drivers
may use the tlb ops from iommu framework.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
---
include/linux/io-pgtable.h | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/include/linux/io-pgtable.h b/include/linux/io-pgtable.h
index ea727eb1a1a9..2a5686ca2ba3 100644
--- a/include/linux/io-pgtable.h
+++ b/include/linux/io-pgtable.h
@@ -214,14 +214,16 @@ struct io_pgtable_domain_attr {

static inline void io_pgtable_tlb_flush_all(struct io_pgtable *iop)
{
- iop->cfg.tlb->tlb_flush_all(iop->cookie);
+ if (iop->cfg.tlb && iop->cfg.tlb->tlb_flush_all)
+ iop->cfg.tlb->tlb_flush_all(iop->cookie);
}

static inline void
io_pgtable_tlb_flush_walk(struct io_pgtable *iop, unsigned long iova,
size_t size, size_t granule)
{
- iop->cfg.tlb->tlb_flush_walk(iova, size, granule, iop->cookie);
+ if (iop->cfg.tlb && iop->cfg.tlb->tlb_flush_walk)
+ iop->cfg.tlb->tlb_flush_walk(iova, size, granule, iop->cookie);
}

static inline void
@@ -229,7 +231,7 @@ io_pgtable_tlb_add_page(struct io_pgtable *iop,
struct iommu_iotlb_gather * gather, unsigned long iova,
size_t granule)
{
- if (iop->cfg.tlb->tlb_add_page)
+ if (iop->cfg.tlb && iop->cfg.tlb->tlb_add_page)
iop->cfg.tlb->tlb_add_page(gather, iova, granule, iop->cookie);
}

--
2.18.0
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