[PATCH 1/1] mtd: fsl-quadspi: Add mutex for accessing different SPI-NOR devices

[Han Xu]

Hi Alexander,

I think it is the same patch

 http://patchwork.ozlabs.org/patch/429631/

On Mon, Jul 20, 2015 at 1:50 AM, Alexander Stein
<alexander.stein at systec-electronic.com> wrote:
> Hello Cory,
>
> On Thursday 16 July 2015 13:29:30, Cory Tusar wrote:
>> On 07/16/2015 10:13 AM, Alexander Stein wrote:
>> > Access is only serialized for each NOR device in spi_nor_lock_and_prep(),
>> > but not for the QSPI device.
>>
>> Are both devices that you're testing with in the below scenario QSPI, or
>> is it a combination of QSPI + some other MTD device?
>
> On my board a s70fl01gs is connected to QSPI bank A. As this is a dual-die
> chip it uses both chip-selcts on bank A. So in the end it's 2 QSPI devices.
> When accessing different flashs on those 2 chip-selects i get the following
> error message:
>> [  233.157410] fsl-quadspi 1550000.quadspi: cmd 0x05 timeout, addr at 00000000,
>> FR:0x08000000, SR:0x00003c00 [  233.166731] error -110 reading SR
>> [  233.170097] end_request: I/O error, dev mtdblock3, sector 72
>> [  233.175740] Buffer I/O error on device mtdblock3, logical block 9
>
> This seems to be caused by simultaneously access to different chips.
>
> Best regards,
> Alexander
> --
> Dipl.-Inf. Alexander Stein
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> alexander.stein at systec-electronic.com
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