From: "Kimmo Surakka" <kusti@iki.fi>
To: linuxppc-embedded@ozlabs.org
Subject: Re: TQM5200 problems (kernel 2.4)
Date: Thu, 2 Aug 2007 12:17:30 +0300 [thread overview]
Message-ID: <a44e83440708020217s2875932fo7b2d8a57af311912@mail.gmail.com> (raw)
In-Reply-To: <a44e83440707052325q7114362chb85e6999f1e09da6@mail.gmail.com>
Hi all,
I've continued my tests with the TQM5200. It appears that the
"Warning: kfree_skb on hard IRQ c008ecfc" errors are happening
because ppp_async_encode calls kfree_skb. I think this in itself is
not a problem, but when I googled for "ppp_async_encode hard IRQ", I found this:
http://search.luky.org/linux-kernel.2001/msg37792.html and
http://search.luky.org/linux-kernel.2001/msg41315.html
It seems that the serial driver should be split into top-half and bottom-half
interrupt handlers. If I read the code right, this is not done either in
the 2.4 kernel (arch/ppc/5xxx_io/psc.c) or in the 2.6 tree
(drivers/serial/mpc52xx_uart.c).
It this really correct, i.e. is the problem in the serial driver or should
I just replace the kfree_skb call in ppp_async_encode with
dev_kfree_skb_any()?
--
Kimmo Surakka <kusti@iki.fi>
http://www.iki.fi/kusti
prev parent reply other threads:[~2007-08-02 9:17 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-04 14:51 TQM5200 problems (kernel 2.4) Kimmo Surakka
2007-07-05 6:54 ` Domen Puncer
2007-07-06 6:21 ` Kimmo Surakka
2007-07-05 22:13 ` Wolfgang Denk
2007-07-06 6:25 ` Kimmo Surakka
2007-08-02 9:17 ` Kimmo Surakka [this message]
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