diff mbox series

[02/11] swiotlb: make swiotlb_exit a no-op if SWIOTLB_FORCE is set

Message ID 20220227143055.335596-3-hch@lst.de
State New
Headers show
Series [01/11] dma-direct: use is_swiotlb_active in dma_direct_map_page | expand

Commit Message

Christoph Hellwig Feb. 27, 2022, 2:30 p.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 f1e7ea160b433..36fbf1181d285 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -378,6 +378,9 @@  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;