linux-kernel - [PATCH v4] ata: pata_arasan_cf: Use dev_err_probe() instead dev_err() in data

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Message-Id: <20230724095712.1541-1-duminjie@vivo.com>
Date:   Mon, 24 Jul 2023 17:57:10 +0800
From:   Minjie Du <duminjie@...o.com>
To:     Sergey Shtylyov <s.shtylyov@....ru>,
        Viresh Kumar <vireshk@...nel.org>,
        Damien Le Moal <dlemoal@...nel.org>,
        linux-ide@...r.kernel.org (open list:LIBATA PATA DRIVERS),
        linux-kernel@...r.kernel.org (open list)
Cc:     opensource.kernel@...o.com, Minjie Du <duminjie@...o.com>
Subject: [PATCH v4] ata: pata_arasan_cf: Use dev_err_probe() instead dev_err() in data_xfer()

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

Signed-off-by: Minjie Du <duminjie@...o.com>
---
V1 - V4:
Fix code format.
---
 drivers/ata/pata_arasan_cf.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/ata/pata_arasan_cf.c b/drivers/ata/pata_arasan_cf.c
index 6ab294322e79..b32d47112c0a 100644
--- a/drivers/ata/pata_arasan_cf.c
+++ b/drivers/ata/pata_arasan_cf.c
@@ -529,7 +529,8 @@ static void data_xfer(struct work_struct *work)
 	/* dma_request_channel may sleep, so calling from process context */
 	acdev->dma_chan = dma_request_chan(acdev->host->dev, "data");
 	if (IS_ERR(acdev->dma_chan)) {
-		dev_err(acdev->host->dev, "Unable to get dma_chan\n");
+		dev_err_probe(acdev->host->dev, PTR_ERR(acdev->dma_chan),
+					  "Unable to get dma_chan\n");
 		acdev->dma_chan = NULL;
 		goto chan_request_fail;
 	}
-- 
2.39.0