linux-kernel - Re: [PATCH 1/1] spi: cadence-quadspi: Fix a compilation warning for 64-bit platform

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Message-ID: <6612b888-63aa-9d8f-c663-3b2857b79b70@huawei.com>
Date:   Tue, 12 Jan 2021 19:23:38 +0800
From:   "Leizhen (ThunderTown)" <thunder.leizhen@...wei.com>
To:     Pratyush Yadav <p.yadav@...com>
CC:     Mark Brown <broonie@...nel.org>,
        linux-spi <linux-spi@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Yanteng Si <siyanteng@...ngson.cn>
Subject: Re: [PATCH 1/1] spi: cadence-quadspi: Fix a compilation warning for
 64-bit platform



On 2021/1/12 18:16, Pratyush Yadav wrote:
> Hi Zhen,
> 
> On 12/01/21 06:06PM, Zhen Lei wrote:
>> The __typecheck() requires that the two arguments of max() must be of the
>> same type. For the current max(), the type of the first parameter "len" is
>> size_t. But the type of size_t is not fixed, it's "unsigned int" on 32-bit
>> platforms and "unsigned long" on 64-bit platforms. So both the suffix "U"
>> and "UL" are not appropriate for the second constant parameter. Therefore,
>> forcible type conversion is used.
>>
>> Fixes: 8728a81b8f10 ("spi: Fix distinct pointer types warning for ARCH=mips")
>> Fixes: 0920a32cf6f2 ("spi: cadence-quadspi: Wait at least 500 ms for direct reads")
>> Signed-off-by: Zhen Lei <thunder.leizhen@...wei.com>
>> ---
>>  drivers/spi/spi-cadence-quadspi.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/spi/spi-cadence-quadspi.c b/drivers/spi/spi-cadence-quadspi.c
>> index 576610ba11184c6..eb40b8d46b56b0c 100644
>> --- a/drivers/spi/spi-cadence-quadspi.c
>> +++ b/drivers/spi/spi-cadence-quadspi.c
>> @@ -1150,7 +1150,7 @@ static int cqspi_direct_read_execute(struct cqspi_flash_pdata *f_pdata,
>>
>>  	dma_async_issue_pending(cqspi->rx_chan);
>>  	if (!wait_for_completion_timeout(&cqspi->rx_dma_complete,
>> -					 msecs_to_jiffies(max(len, 500U)))) {
>> +				 msecs_to_jiffies(max_t(size_t, len, 500)))) {
> 
> I sent a patch with this exact fix already [0]. It has made it in Mark's 
> for-next branch.

OK，I don't known it.

> 
> [0] https://lore.kernel.org/linux-spi/20210108181457.30291-1-p.yadav@ti.com/
> 
>>  		dmaengine_terminate_sync(cqspi->rx_chan);
>>  		dev_err(dev, "DMA wait_for_completion_timeout\n");
>>  		ret = -ETIMEDOUT;
>> --
>> 1.8.3
>>
>>
>