[PATCH v12 0/3] add the GPMI controller driver for IMX23/IMX28

[gianluca]

Sorry for intrusion in this discussion, but:

Huang Shijie wrote:
>> channels are being used concurrently. The GPMI driver will bail out
>> with the timeout error while the MMC driver obviously has no timeout
>> check for this situation.
>>
>> I can mostly rule out HW problems, because the same board works
>> perfectly well with WindowsCE (tested with a copy operation between
>> flash and SD card).
>>
>>
>> Lothar Waßmann

@Lothar: Probably WinCE with a copy operation between flash and SD is 
not reliable as synchronous as opposed dd command in the previous mail.

dd is sync when: dd if=/dev/mtd... of=/dev/mmc...

dd is async when:

# dd if=/dev/mtd of=/mnt/somewhere/file1 &
# dd if=/mnt/somewhere/file2 of=/dev/mmc &

Or even the worst scenario:

# dd if=/dev/mtdX of=/dev/null &
# dd if=/dev/urandom of=/dev/mmcX &
# dd if=/dev/mmcX of=/dev/null &
# dd if=/dev/urandom of=/dev/mtdX &

Just my .2 cents.

Best regards,
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Gianluca Renzi
R&D
phone: +39.0542.609120
fax:   +39.0542.609212

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