linux-kernel - [PATCH 1/4] blk-mq-dma: migrate to dma_map_phys instead of map

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Message-ID: <a40705f38a9f3c757f30228b9b848ce0a87cbcdd.1760369219.git.leon@kernel.org>
Date: Mon, 13 Oct 2025 18:34:09 +0300
From: Leon Romanovsky <leon@...nel.org>
To: Christoph Hellwig <hch@....de>,
	Jens Axboe <axboe@...nel.dk>
Cc: Leon Romanovsky <leonro@...dia.com>,
	Jason Gunthorpe <jgg@...dia.com>,
	Keith Busch <kbusch@...nel.org>,
	linux-block@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-nvme@...ts.infradead.org,
	Sagi Grimberg <sagi@...mberg.me>
Subject: [PATCH 1/4] blk-mq-dma: migrate to dma_map_phys instead of map_page

From: Leon Romanovsky <leonro@...dia.com>

After introduction of dma_map_phys(), there is no need to convert
from physical address to struct page in order to map page. So let's
use it directly.

Reviewed-by: Keith Busch <kbusch@...nel.org>
Signed-off-by: Leon Romanovsky <leonro@...dia.com>
---
 block/blk-mq-dma.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/block/blk-mq-dma.c b/block/blk-mq-dma.c
index 449950029872..4ba7b0323da4 100644
--- a/block/blk-mq-dma.c
+++ b/block/blk-mq-dma.c
@@ -93,8 +93,8 @@ static bool blk_dma_map_bus(struct blk_dma_iter *iter, struct phys_vec *vec)
 static bool blk_dma_map_direct(struct request *req, struct device *dma_dev,
 		struct blk_dma_iter *iter, struct phys_vec *vec)
 {
-	iter->addr = dma_map_page(dma_dev, phys_to_page(vec->paddr),
-			offset_in_page(vec->paddr), vec->len, rq_dma_dir(req));
+	iter->addr = dma_map_phys(dma_dev, vec->paddr, vec->len,
+			rq_dma_dir(req), 0);
 	if (dma_mapping_error(dma_dev, iter->addr)) {
 		iter->status = BLK_STS_RESOURCE;
 		return false;
-- 
2.51.0