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| author | Robin Murphy <robin.murphy@arm.com> | 2021-05-21 15:49:39 +0200 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2021-06-04 17:11:26 +0200 |
| commit | 9197bc958fc98ce17341636b3368f180a23d9653 (patch) | |
| tree | 02cba7f1e3b2ecf37f910ce2cdbbefb80293aabe /drivers/iommu/rockchip-iommu.c | |
| parent | Linux 5.13-rc4 (diff) | |
| download | linux-9197bc958fc98ce17341636b3368f180a23d9653.tar.xz linux-9197bc958fc98ce17341636b3368f180a23d9653.zip | |
iommu/rockchip: Remove redundant DMA syncs
When we allocate new pagetable pages, we don't modify them between the
initial dma_map_single() call and the dma_sync_single_for_device() call
via rk_iommu_flush(), so the latter is entirely pointless.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/5c29a9ff0a20df0167635b1901f94b5195c1fb28.1621604979.git.robin.murphy@arm.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/rockchip-iommu.c')
| -rw-r--r-- | drivers/iommu/rockchip-iommu.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c index 7a2932772fdf..e5116d6a6260 100644 --- a/drivers/iommu/rockchip-iommu.c +++ b/drivers/iommu/rockchip-iommu.c @@ -682,7 +682,6 @@ static u32 *rk_dte_get_page_table(struct rk_iommu_domain *rk_domain, dte = rk_mk_dte(pt_dma); *dte_addr = dte; - rk_table_flush(rk_domain, pt_dma, NUM_PT_ENTRIES); rk_table_flush(rk_domain, rk_domain->dt_dma + dte_index * sizeof(u32), 1); done: @@ -1004,8 +1003,6 @@ static struct iommu_domain *rk_iommu_domain_alloc(unsigned type) goto err_free_dt; } - rk_table_flush(rk_domain, rk_domain->dt_dma, NUM_DT_ENTRIES); - spin_lock_init(&rk_domain->iommus_lock); spin_lock_init(&rk_domain->dt_lock); INIT_LIST_HEAD(&rk_domain->iommus); |