i.MX ProcessorsのトピックRe: Serious bug in SDHC driver for WinEC7

Serious bug in SDHC driver for WinEC7

AlexeyT — Mon, 18 Mar 2013 11:57:31 GMT

Hi,

I think found very serious issue in EC7 SDHC driver.

In my case it leads to complete hang in SDHC driver in certain use cases.

It is being triggered by certain sequence of SD bus commands received by the CESDHCBase in common FSL code part..

The log from instrumented (traces added) version of that driver is attached to this message.

The issue was triggered by following command sequence

CMD25 non fast path

CMD12

CMD24 non fast path

After this sequence SDHC driver is dead.

The problem appears to be in global variable of current request.

It looks like we can have MORE then ONE current request because request processing code calls

new request add code FROM previous request's completion call so we have several requests on the stack.

Somewhere in that chain of calls/requests 'current request' global variable loses the ground and it makes driver hang.

Has anyone experienced this problem?

How can it be fixed?

FYI: this bug may affect all iMX drivers for WINEC7 because it is in common FSL code.

Attached: log from hung driver.

Original Attachment has been moved to: Log1---fail-2560-bytes.txt.zip

karina_valencia — Fri, 22 Mar 2013 16:32:38 GMT

Deactivated user can you help on this case?

AlexeyT — Thu, 28 Mar 2013 09:45:37 GMT

Hello,

I hope I can help with this case.

I managed to work around it but my fix is ugly and

I am not sure that it fixes the issue completely.

Which information do you need?

I would recommend that we switch to private messages.

Best regards,

Alexey

karina_valencia — Mon, 08 Apr 2013 18:55:59 GMT

Adeneo Engineering Team do you have an update on this case?

hedehodo — Sat, 18 Oct 2014 10:19:21 GMT

Hi All,

I faced with the similar issue. I am wondering if this problem is solved.

Thanks.