diff mbox series

[02/15] swiotlb: make swiotlb_exit a no-op if SWIOTLB_FORCE is set

Message ID 20220314073129.1862284-3-hch@lst.de (mailing list archive)
State New, archived
Headers show
Series [01/15] dma-direct: use is_swiotlb_active in dma_direct_map_page | expand

Commit Message

Christoph Hellwig March 14, 2022, 7:31 a.m. UTC 
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>
---
 kernel/dma/swiotlb.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index 908eac2527cb1..af9d257501a64 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;