linux-kernel - [PATCH v2 02/13] dmaengine: altera-msgdma: use sg_nents_for

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Message-ID: <20251110103805.3562136-3-andriy.shevchenko@linux.intel.com>
Date: Mon, 10 Nov 2025 11:23:29 +0100
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Stefan Wahren <wahrenst@....net>,
	Vinod Koul <vkoul@...nel.org>,
	Thomas Andreatta <thomasandreatta2000@...il.com>,
	Caleb Sander Mateos <csander@...estorage.com>,
	dmaengine@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-rpi-kernel@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-arm-msm@...r.kernel.org
Cc: Olivier Dautricourt <olivierdautricourt@...il.com>,
	Stefan Roese <sr@...x.de>,
	Florian Fainelli <florian.fainelli@...adcom.com>,
	Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>,
	Ray Jui <rjui@...adcom.com>,
	Scott Branden <sbranden@...adcom.com>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>,
	Daniel Mack <daniel@...que.org>,
	Haojian Zhuang <haojian.zhuang@...il.com>,
	Robert Jarzmik <robert.jarzmik@...e.fr>,
	Lizhi Hou <lizhi.hou@....com>,
	Brian Xu <brian.xu@....com>,
	Raj Kumar Rampelli <raj.kumar.rampelli@....com>,
	Michal Simek <michal.simek@....com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH v2 02/13] dmaengine: altera-msgdma: use sg_nents_for_dma() helper

Instead of open coded variant let's use recently introduced helper.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/dma/altera-msgdma.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/dma/altera-msgdma.c b/drivers/dma/altera-msgdma.c
index a203fdd84950..48d2a0e638bb 100644
--- a/drivers/dma/altera-msgdma.c
+++ b/drivers/dma/altera-msgdma.c
@@ -396,13 +396,12 @@ msgdma_prep_slave_sg(struct dma_chan *dchan, struct scatterlist *sgl,
 	void *desc = NULL;
 	size_t len, avail;
 	dma_addr_t dma_dst, dma_src;
-	u32 desc_cnt = 0, i;
 	struct scatterlist *sg;
+	u32 desc_cnt;
 	u32 stride;
 	unsigned long irqflags;
 
-	for_each_sg(sgl, sg, sg_len, i)
-		desc_cnt += DIV_ROUND_UP(sg_dma_len(sg), MSGDMA_MAX_TRANS_LEN);
+	desc_cnt = sg_nents_for_dma(sgl, sg_len, MSGDMA_MAX_TRANS_LEN);
 
 	spin_lock_irqsave(&mdev->lock, irqflags);
 	if (desc_cnt > mdev->desc_free_cnt) {
-- 
2.50.1