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| author | Yong Wu <yong.wu@mediatek.com> | 2019-11-04 15:01:03 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-17 19:48:59 +0100 |
| commit | f07d3e39f082e7d07d3f085641c35f3b5e553753 (patch) | |
| tree | 16021a13e2ba9730d02967e58aa4346a3cac0d6a /drivers/memory | |
| parent | e5c3362bc211bd0c38bd7accac690fdd098978a8 (diff) | |
| download | linux-f07d3e39f082e7d07d3f085641c35f3b5e553753.tar.gz linux-f07d3e39f082e7d07d3f085641c35f3b5e553753.tar.bz2 linux-f07d3e39f082e7d07d3f085641c35f3b5e553753.zip | |
iommu/mediatek: Add a new tlb_lock for tlb_flush
commit da3cc91b8db403728cde03c8a95cba268d8cbf1b upstream.
The commit 4d689b619445 ("iommu/io-pgtable-arm-v7s: Convert to IOMMU API
TLB sync") help move the tlb_sync of unmap from v7s into the iommu
framework. It helps add a new function "mtk_iommu_iotlb_sync", But it
lacked the lock, then it will cause the variable "tlb_flush_active"
may be changed unexpectedly, we could see this warning log randomly:
mtk-iommu 10205000.iommu: Partial TLB flush timed out, falling back to
full flush
The HW requires tlb_flush/tlb_sync in pairs strictly, this patch adds
a new tlb_lock for tlb operations to fix this issue.
Fixes: 4d689b619445 ("iommu/io-pgtable-arm-v7s: Convert to IOMMU API TLB sync")
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/memory')
0 files changed, 0 insertions, 0 deletions