[PATCH 3/7] swiotlb: use swiotlb_adjust_size in setup_io_tlb_npages

[Christoph Hellwig]

Use the proper helper to do the proper alignment of the buffer size
to the requirements of the swiotlb allocator instead of open coding
the logic.

Signed-off-by: Christoph Hellwig <hch at lst.de>
---
 kernel/dma/swiotlb.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index 27461fd63e0330..93737d0932fbf2 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -76,11 +76,9 @@ static unsigned long default_nslabs = IO_TLB_DEFAULT_SIZE >> IO_TLB_SHIFT;
 static int __init
 setup_io_tlb_npages(char *str)
 {
-	if (isdigit(*str)) {
-		/* avoid tail segment of size < IO_TLB_SEGSIZE */
-		default_nslabs =
-			ALIGN(simple_strtoul(str, &str, 0), IO_TLB_SEGSIZE);
-	}
+	if (isdigit(*str))
+		swiotlb_adjust_size(
+			simple_strtoul(str, &str, 0) << IO_TLB_SHIFT);
 	if (*str == ',')
 		++str;
 	if (!strcmp(str, "force"))
-- 
2.30.1