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From: Boris Shteinbock <boris@fabiotec.com>
To: linuxppc-embedded@ozlabs.org
Subject: CPM2 (MPC8260) SMC problem. Please help.
Date: Wed, 18 Oct 2006 22:40:31 +0200	[thread overview]
Message-ID: <4536913F.8060801@fabiotec.com> (raw)

Hi ppl.

I have discovered very very odd problem with SMC2 on my 8260 board.
kernel version is 2.6.17.

The board is 8260 with serial ports on SMC1 and SMC 2 (SMC1 - console)

Now if I use SMC2 for communicating with remote device, ( some protocol)
I am sending packets and wait for a response.
However if the packet I send is SMALLER than 5 bytes, SMC goes 
completely crazy.
write() doesn't return error, but the next read() hangs completely, and the
process moves to D state and it is impossible to kill it by any means.
It only happens when consequent writes of smaller than 5 bytes.
I tried to check the driver, but couldn't find any clues to what goes wrong.

I tried both compatibility and platform-based modes with the same results.

Any help on the issue would be highliy appreciated.

             reply	other threads:[~2006-10-18 21:10 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-10-18 20:40 Boris Shteinbock [this message]
2006-10-20 15:03 ` CPM2 (MPC8260) SMC problem. Please help Vitaly Bordug
  -- strict thread matches above, loose matches on Subject: below --
2006-10-23 16:02 Greg Lopp
2006-10-23 16:09 ` Pantelis Antoniou
2006-10-23 17:23   ` Vitaly Bordug

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