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Message-ID: <6A852B9E-D84C-4F80-9C17-62BFBB98CC8A@walle.cc>
Date: Wed, 15 Jun 2022 20:10:13 +0200
From: Michael Walle <michael@...le.cc>
To: Mika Westerberg <mika.westerberg@...ux.intel.com>,
"Oleksandr Ocheretnyi -X (oocheret - GLOBALLOGIC INC at Cisco)"
<oocheret@...co.com>
CC: "tudor.ambarus@...rochip.com" <tudor.ambarus@...rochip.com>,
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Subject: Re: [PATCH] mtd: spi-nor: handle unsupported FSR opcodes properly
Am 15. Juni 2022 11:49:22 OEZ schrieb Mika Westerberg <mika.westerberg@...ux.intel.com>:
>Hi,
>
>On Tue, Jun 14, 2022 at 05:56:54PM +0000, Oleksandr Ocheretnyi -X (oocheret - GLOBALLOGIC INC at Cisco) wrote:
>> Hello Mika,
>>
>> in my case (I work with memory chip n25q128a13 for recent kernels) I'm
>> getting return value -ENOTSUPP from spi_mem_exec_op() call in the
>> micron_st_nor_read_fsr() method
>> [[1]https://elixir.bootlin.com/linux/v5.19-rc2/source/drivers/spi/spi-m
>> em.c#L326]. So I decided to provide the same errorcode to
>> intel_spi_hw_cycle() method because older kernel versions throw the
>> error there. It is fine to use -EOPNOTSUPP return value instead.
>>
>> I suspect we need to cover both cases to check -ENOTSUPP as well as
>> -EOPNOTSUPP to let the driver work properly.
>>
>> if (ret == -ENOTSUPP || ret == -EOPNOTSUPP)
>
>I think we should follow the same in the Intel driver and return
>-ENOTSUPP too.
AFAIK ENOTSUPP is for nfs and shouldn't be used.
-michael
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