[v5] ata: pata_arasan_cf: Use dev_err_probe() instead dev_err() in data_xfer()

[PATCH v5] ata: pata_arasan_cf: Use dev_err_probe() instead dev_err() in data_xfer()

Posted by Minjie Du 2 years, 1 month ago

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@vivo.com>
---
V2 -> V5: Fixed code formatting errors.
---
 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

Re: [PATCH v5] ata: pata_arasan_cf: Use dev_err_probe() instead dev_err() in data_xfer()

Posted by Damien Le Moal 2 years, 1 month ago

On 7/25/23 12:06, Minjie Du wrote:
> 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@vivo.com>

Applied to for-6.5-fixes. Thanks !

-- 
Damien Le Moal
Western Digital Research

Re: [PATCH v5] ata: pata_arasan_cf: Use dev_err_probe() instead dev_err() in data_xfer()

Posted by Sergey Shtylyov 2 years, 1 month ago

On 7/25/23 6:06 AM, Minjie Du wrote:

> 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.

   It will, else the patch wouldn't have been needed, right?

> Signed-off-by: Minjie Du <duminjie@vivo.com>
> ---
> V2 -> V5: Fixed code formatting errors.
> ---
>  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;
>  	}

Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>

[...]

MBR, Sergey

Re: [PATCH v5] ata: pata_arasan_cf: Use dev_err_probe() instead dev_err() in data_xfer()

Posted by Viresh Kumar 2 years, 1 month ago

On 25-07-23, 11:06, Minjie Du wrote:
> 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@vivo.com>
> ---
> V2 -> V5: Fixed code formatting errors.
> ---
>  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;
>  	}

Missed it last time, but the formatting looks okay now I guess.

Acked-by: Viresh Kumar <viresh.kumar@linaro.org>

-- 
viresh