linux-kernel - [PATCH 06/33] dmaengine: at_hdmac: Return dma_cookie

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Date:   Sat, 20 Aug 2022 15:56:50 +0300
From:   Tudor Ambarus <tudor.ambarus@...rochip.com>
To:     <vkoul@...nel.org>, <peda@...ntia.se>, <du@...ntia.se>,
        <regressions@...mhuis.info>
CC:     <ludovic.desroches@...rochip.com>, <maciej.sosnowski@...el.com>,
        <tudor.ambarus@...rochip.com>, <dan.j.williams@...el.com>,
        <nicolas.ferre@...rochip.com>, <mripard@...nel.org>,
        <torfl6749@...il.com>, <linux-kernel@...r.kernel.org>,
        <dmaengine@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>
Subject: [PATCH 06/33] dmaengine: at_hdmac: Return dma_cookie_status()'s ret code when txstate is NULL

txstate is an optional parameter used to get a struct with auxilary
transfer status information. When not provided the call to
device_tx_status() should return the status of the dma cookie. Return the
status of dma cookie when the txstate optional parameter is not provided.

Signed-off-by: Tudor Ambarus <tudor.ambarus@...rochip.com>
---
 drivers/dma/at_hdmac.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c
index 085a990f8d5d..91e53a590d5f 100644
--- a/drivers/dma/at_hdmac.c
+++ b/drivers/dma/at_hdmac.c
@@ -1947,14 +1947,8 @@ atc_tx_status(struct dma_chan *chan,
 	int bytes = 0;
 
 	ret = dma_cookie_status(chan, cookie, txstate);
-	if (ret == DMA_COMPLETE)
+	if (ret == DMA_COMPLETE || !txstate)
 		return ret;
-	/*
-	 * There's no point calculating the residue if there's
-	 * no txstate to store the value.
-	 */
-	if (!txstate)
-		return DMA_ERROR;
 
 	spin_lock_irqsave(&atchan->lock, flags);
 
-- 
2.25.1