[PATCH v4] ata: pata_arasan_cf: Use dev_err_probe() instead dev_err() in data_xfer()

[PATCH v4] ata: pata_arasan_cf: Use dev_err_probe() instead dev_err() in data_xfer()

[Minjie Du]

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>
---
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

Re: [PATCH v4] ata: pata_arasan_cf: Use dev_err_probe() instead dev_err() in data_xfer()

[Viresh Kumar]

On 24-07-23, 17:57, 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>
> ---
> 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;
>  	}

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

-- 
viresh

Re: [PATCH v4] ata: pata_arasan_cf: Use dev_err_probe() instead dev_err() in data_xfer()

[Sergei Shtylyov]

On 7/24/23 12:57 PM, 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>
> ---
> V1 - V4:
> Fix code format.

   I'm not seeing any fixing in v4

> ---
>  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;
>  	}

   That's how the dev_err_probe() continuation line shouuld be
formatted...

MBR, Sergey

Re: [PATCH v4] ata: pata_arasan_cf: Use dev_err_probe() instead dev_err() in data_xfer()

[Damien Le Moal]

On 7/24/23 18:57, 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>
> ---
> V1 - V4:
> Fix code format.

You are not fixing anything. You keep resending the same, which is missing the
dev_err_probe() message alignment like I (and Sergey) keep telling you. Can you
please take our comments seriously and act on them ? If you do not understand,
then say so and I will explain in more details.

> ---
>  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");

Just use this please, formatted *exactly* like this.

		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;
>  	}

-- 
Damien Le Moal
Western Digital Research