diff mbox series

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

Message ID 20220222153514.593231-3-hch@lst.de (mailing list archive)
State New, archived
Headers show
Series [01/11] dma-direct: use is_swiotlb_active in dma_direct_map_page | expand

Commit Message

Christoph Hellwig Feb. 22, 2022, 3:35 p.m. UTC
If force bouncing is enabled we can't release the bufffers.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 kernel/dma/swiotlb.c | 3 +++
 1 file changed, 3 insertions(+)

Comments

Anshuman Khandual Feb. 24, 2022, 10:29 a.m. UTC | #1
On 2/22/22 9:05 PM, Christoph Hellwig wrote:
> If force bouncing is enabled we can't release the bufffers.

typo							^^^^

> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>  kernel/dma/swiotlb.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> 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;
>  
> 

Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
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;