linux-kernel - [PATCH v2] spi: fsl-dspi: Use dev_err_probe() in dspi_request

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Message-Id: <20230725035038.1702-1-duminjie@vivo.com>
Date:   Tue, 25 Jul 2023 11:50:37 +0800
From:   Minjie Du <duminjie@...o.com>
To:     Vladimir Oltean <olteanv@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Richard Cochran <richardcochran@...il.com>,
        linux-spi@...r.kernel.org (open list:FREESCALE DSPI DRIVER),
        linux-kernel@...r.kernel.org (open list),
        netdev@...r.kernel.org (open list:PTP HARDWARE CLOCK SUPPORT)
Cc:     opensource.kernel@...o.com, Minjie Du <duminjie@...o.com>
Subject: [PATCH v2] spi: fsl-dspi: Use dev_err_probe() in dspi_request_dma()

It is possible for dma_request_chan() to return EPROBE_DEFER, which means
dev is not ready yet.
At this point dev_err() will have no output.

Signed-off-by: Minjie Du <duminjie@...o.com>
---
 drivers/spi/spi-fsl-dspi.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c
index ca41c8a8b..6aaa529b7 100644
--- a/drivers/spi/spi-fsl-dspi.c
+++ b/drivers/spi/spi-fsl-dspi.c
@@ -503,15 +503,14 @@ static int dspi_request_dma(struct fsl_dspi *dspi, phys_addr_t phy_addr)
 
 	dma->chan_rx = dma_request_chan(dev, "rx");
 	if (IS_ERR(dma->chan_rx)) {
-		dev_err(dev, "rx dma channel not available\n");
-		ret = PTR_ERR(dma->chan_rx);
-		return ret;
+		return dev_err_probe(dev, PTR_ERR(dma->chan_rx),
+			"rx dma channel not available\n");
 	}
 
 	dma->chan_tx = dma_request_chan(dev, "tx");
 	if (IS_ERR(dma->chan_tx)) {
-		dev_err(dev, "tx dma channel not available\n");
 		ret = PTR_ERR(dma->chan_tx);
+		dev_err_probe(dev, ret, "tx dma channel not available\n");
 		goto err_tx_channel;
 	}
 
-- 
2.39.0