linux-kernel - [PATCH] dmaengine: uniphier-xdmac: Use readl_poll_timeout

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Date:   Tue, 27 Jul 2021 14:47:32 +0900
From:   Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
To:     Vinod Koul <vkoul@...nel.org>
Cc:     Dan Carpenter <dan.carpenter@...cle.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        dmaengine@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org,
        Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
Subject: [PATCH] dmaengine: uniphier-xdmac: Use readl_poll_timeout_atomic() in atomic state

The function uniphier_xdmac_chan_stop() is only called in atomic state.
Should use readl_poll_timeout_atomic() there instead of
readl_poll_timeout().

Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Fixes: 667b9251440b ("dmaengine: uniphier-xdmac: Add UniPhier external DMA controller driver")
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
---
 drivers/dma/uniphier-xdmac.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/uniphier-xdmac.c b/drivers/dma/uniphier-xdmac.c
index 16b1965..d6b8a20 100644
--- a/drivers/dma/uniphier-xdmac.c
+++ b/drivers/dma/uniphier-xdmac.c
@@ -209,8 +209,8 @@ static int uniphier_xdmac_chan_stop(struct uniphier_xdmac_chan *xc)
 	writel(0, xc->reg_ch_base + XDMAC_TSS);
 
 	/* wait until transfer is stopped */
-	return readl_poll_timeout(xc->reg_ch_base + XDMAC_STAT, val,
-				  !(val & XDMAC_STAT_TENF), 100, 1000);
+	return readl_poll_timeout_atomic(xc->reg_ch_base + XDMAC_STAT, val,
+					 !(val & XDMAC_STAT_TENF), 100, 1000);
 }
 
 /* xc->vc.lock must be held by caller */
-- 
2.7.4