Re: [PATCH] spi: tegra210-quad: downgrade the log when fall back to PIO

[Guixin Liu <kanie@linux.alibaba.com>]

在 2025/12/10 12:24, Jon Hunter 写道:
>
> On 27/11/2025 13:02, Guixin Liu wrote:
>> When the machine boots using ACPI, Tegra cannot use DMA and falls back
>> to PIO. In this case, logging these messages as "Error" may confuse
>> users into thinking it is an actual error; therefore, these two log
>> messages should be downgraded to "Info" level.
>
> Which Tegra device are you using?
Tegra194.
The error log are:
     tegra-i2c NVDA0301:00 cannot use DMA: -19
     tegra-i2c NVDA0301:00 failling back to PIO
>
>> Signed-off-by: Guixin Liu <kanie@linux.alibaba.com>
>> ---
>>   drivers/spi/spi-tegra210-quad.c | 4 ++--
>>   1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/spi/spi-tegra210-quad.c 
>> b/drivers/spi/spi-tegra210-quad.c
>> index 3be7499db21e..2189904b931d 100644
>> --- a/drivers/spi/spi-tegra210-quad.c
>> +++ b/drivers/spi/spi-tegra210-quad.c
>> @@ -823,8 +823,8 @@ static int tegra_qspi_init_dma(struct tegra_qspi 
>> *tqspi)
>>       tegra_qspi_deinit_dma(tqspi);
>>         if (err != -EPROBE_DEFER) {
>> -        dev_err(tqspi->dev, "cannot use DMA: %d\n", err);
>> -        dev_err(tqspi->dev, "falling back to PIO\n");
>> +        dev_info(tqspi->dev, "cannot use DMA: %d\n", err);
>> +        dev_info(tqspi->dev, "falling back to PIO\n");
>>           return 0;
>>       }
>
> This change would potentially hide an actual case where the DMA 
> initialisation fails when booting with device-tree.
>
> Jon
>
Could we downgrade this to warning? This will not potentially hide an 
actual DMA fail case, and also tell users that we can still work, don't 
worry.

Best Regards,
Guixin Liu