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| author | Christoph Hellwig <hch@lst.de> | 2022-02-14 10:01:26 +0100 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2022-04-18 07:21:08 +0200 |
| commit | 3469d36d470df148e8d940c1a6399510562bf3b0 (patch) | |
| tree | 2c8569f3775c420f5f81a28e57ae43b3a2552fd9 /kernel/dma | |
| parent | 07410559f38360885e91cff1b800168681ac515c (diff) | |
| download | linux-3469d36d470df148e8d940c1a6399510562bf3b0.tar.gz | |
swiotlb: make swiotlb_exit a no-op if SWIOTLB_FORCE is set
If force bouncing is enabled we can't release the buffers.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Tested-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Diffstat (limited to 'kernel/dma')
| -rw-r--r-- | kernel/dma/swiotlb.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index 73a41cec9e386..98bb0eb44a7bf 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -369,6 +369,9 @@ void __init swiotlb_exit(void) unsigned long tbl_vaddr; size_t tbl_size, slots_size; + if (swiotlb_force == SWIOTLB_FORCE) + return; + if (!mem->nslabs) return; |