linux-kernel - [PATCH v2 08/13] dmaengine: pxa-dma: use sg_nents_for

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Message-ID: <20251110103805.3562136-9-andriy.shevchenko@linux.intel.com>
Date: Mon, 10 Nov 2025 11:23:35 +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 08/13] dmaengine: pxa-dma: 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/pxa_dma.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/dma/pxa_dma.c b/drivers/dma/pxa_dma.c
index 249296389771..b639c8b51e87 100644
--- a/drivers/dma/pxa_dma.c
+++ b/drivers/dma/pxa_dma.c
@@ -970,7 +970,7 @@ pxad_prep_slave_sg(struct dma_chan *dchan, struct scatterlist *sgl,
 	struct scatterlist *sg;
 	dma_addr_t dma;
 	u32 dcmd, dsadr = 0, dtadr = 0;
-	unsigned int nb_desc = 0, i, j = 0;
+	unsigned int nb_desc, i, j = 0;
 
 	if ((sgl == NULL) || (sg_len == 0))
 		return NULL;
@@ -979,8 +979,7 @@ pxad_prep_slave_sg(struct dma_chan *dchan, struct scatterlist *sgl,
 	dev_dbg(&chan->vc.chan.dev->device,
 		"%s(): dir=%d flags=%lx\n", __func__, dir, flags);
 
-	for_each_sg(sgl, sg, sg_len, i)
-		nb_desc += DIV_ROUND_UP(sg_dma_len(sg), PDMA_MAX_DESC_BYTES);
+	nb_desc = sg_nents_for_dma(sgl, sg_len, PDMA_MAX_DESC_BYTES);
 	sw_desc = pxad_alloc_desc(chan, nb_desc + 1);
 	if (!sw_desc)
 		return NULL;
-- 
2.50.1