From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Date: Tue, 26 May 2026 08:47:00 +0000 (+0300)
Subject: dmaengine: sh: rz-dmac: Add helper to check if the channel is paused
X-Git-Tag: v7.2-rc1~55^2~37
X-Git-Url: http://git.ipfire.org/index.cgi?a=commitdiff_plain;h=1dddc864dfa844efaf36345eb58b121b2cdffa5f;p=thirdparty%2Flinux.git

dmaengine: sh: rz-dmac: Add helper to check if the channel is paused

Add the rz_dmac_chan_is_paused() helper to check if the channel is paused.
This helper will be reused in subsequent patches.

Reviewed-by: Frank Li <Frank.Li@nxp.com>
Tested-by: John Madieu <john.madieu.xa@bp.renesas.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Tested-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
Link: https://patch.msgid.link/20260526084710.3491480-9-claudiu.beznea@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---

diff --git a/drivers/dma/sh/rz-dmac.c b/drivers/dma/sh/rz-dmac.c
index 76bac11c217cd..217657513fa76 100644
--- a/drivers/dma/sh/rz-dmac.c
+++ b/drivers/dma/sh/rz-dmac.c
@@ -286,6 +286,13 @@ static bool rz_dmac_chan_is_enabled(struct rz_dmac_chan *channel)
 	return !!(val & CHSTAT_EN);
 }
 
+static bool rz_dmac_chan_is_paused(struct rz_dmac_chan *channel)
+{
+	u32 val = rz_dmac_ch_readl(channel, CHSTAT, 1);
+
+	return !!(val & CHSTAT_SUS);
+}
+
 static void rz_dmac_enable_hw(struct rz_dmac_chan *channel)
 {
 	struct dma_chan *chan = &channel->vc.chan;
@@ -822,12 +829,9 @@ static enum dma_status rz_dmac_tx_status(struct dma_chan *chan,
 		return status;
 
 	scoped_guard(spinlock_irqsave, &channel->vc.lock) {
-		u32 val;
-
 		residue = rz_dmac_chan_get_residue(channel, cookie);
 
-		val = rz_dmac_ch_readl(channel, CHSTAT, 1);
-		if (val & CHSTAT_SUS)
+		if (rz_dmac_chan_is_paused(channel))
 			status = DMA_PAUSED;
 	}