[RESEND PATCH] mtd: spi-nor: core: Check written SR value in spi_nor_write_16bit_sr_and_check()

[Tudor.Ambarus at microchip.com]

On 4/27/22 11:59, Pratyush Yadav wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
> 
> On 27/04/22 07:14AM, Tudor.Ambarus at microchip.com wrote:
>> On 4/27/22 10:11, Tudor Ambarus wrote:
>>> On 1/31/22 19:19, Pratyush Yadav wrote:
>>>> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
>>>>
>>>> On 26/01/22 03:32PM, Chen-Tsung Hsieh wrote:
>>>>> Read back Status Register 1 to ensure that the written byte match the
>>>>> received value and return -EIO if read back test failed.
>>>>>
>>>>> Without this patch, spi_nor_write_16bit_sr_and_check() only check the
>>>>> second half of the 16bit. It causes errors like spi_nor_sr_unlock()
>>>>> return success incorrectly when spi_nor_write_16bit_sr_and_check()
>>>>> doesn't write SR successfully.
>>>>>
>>
>> cc to stable please
> 
> Since this has the Fixes tag, once the patch hits the MTD tree stable
> should pick it up right?

yes, but indirectly. The recommended way to submit to stable is to cc stable.
See: https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html

> 
>>
>>>>> Fixes: 39d1e3340c73 ("mtd: spi-nor: Fix clearing of QE bit on lock()/unlock()")
>>>>> Signed-off-by: Chen-Tsung Hsieh <chentsung at chromium.org>
>>>>
>>>> I don't know much about this bit of code but this patch looks fine to me
>>>> from the surface. Would be nice to hear from Tudor about this too since
>>>> he added the function.
>>>
>>> Reviewed-by: Tudor Ambarus <tudor.ambarus at microchip.com>
>>>>
>>>> Acked-by: Pratyush Yadav <p.yadav at ti.com>
>>
> 
> --
> Regards,
> Pratyush Yadav
> Texas Instruments Inc.