From: Alexander Varnin <fenixk19@mail.ru>
To: Nicholas Mc Guire <der.herr@hofr.at>
Cc: linux-embedded@vger.kernel.org
Subject: Re: Need help adding platform UIO devices to board
Date: Thu, 29 Nov 2012 13:47:25 +0400 [thread overview]
Message-ID: <50B72F2D.30101@mail.ru> (raw)
In-Reply-To: <50B72B0D.80904@mail.ru>
29.11.2012 13:29, Alexander Varnin пишет:
> 28.11.2012 23:03, Nicholas Mc Guire пишет:
> Yes, sorry, stupid mistake.
> But with the correct rights O_RDWR i get error 22 EINVAL both on read
> and write.
> So problem is still there.
> --
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Seems to be solved.
Problem was due to lines
if (count != sizeof(s32))
return -EINVAL;
in uio_read kernel function.
I've made read of 4 bytes, and it is ok.
next prev parent reply other threads:[~2012-11-29 9:47 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-28 18:53 Need help adding platform UIO devices to board Alexander Varnin
2012-11-28 19:03 ` Nicholas Mc Guire
2012-11-29 9:29 ` Alexander Varnin
2012-11-29 9:47 ` Alexander Varnin [this message]
[not found] ` <008d01cdce0d$d6ea04d0$84be0e70$@iii.org.tw>
2012-11-29 9:38 ` Alexander Varnin
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