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Subject: Re: Suggested patch: reset errno after isatty()
From: Artem Bityutskiy <dedekind1@gmail.com>
To: Ketil Froyn <ketil@froyn.name>
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Date: Wed, 24 Nov 2010 16:12:39 +0200
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Cc: "linux-mtd@lists.infradead.org" <linux-mtd@lists.infradead.org>,
	Matthieu CASTET <matthieu.castet@parrot.com>,
	Mike Frysinger <vapier.adi@gmail.com>
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On Wed, 2010-11-24 at 10:59 +0100, Ketil Froyn wrote:
> On Wed, Nov 24, 2010 at 8:50 AM, Mike Frysinger <vapier.adi@gmail.com> wrote:
> > On Thu, Nov 18, 2010 at 06:13, Ketil Froyn wrote:
> >
> > so you'll want to dive into the ioctls to see what isnt working right.
> >  strace is your friend.
> 
> Thanks for the kick. I had tried that, but for some reason strace was
> dying with the error "syscall: unknown syscall trap 0xe8bd8008". A
> little more searching now led me to this patch, which fixed it for me:
> 
> http://www.fluff.org/ben/patches/strace/strace-fix-arm-bad-syscall.patch
> 
> Anyway, here's the full output:

So it dies very soon. You should easily find the line of code where this
happens with gdb. Just compile nanddump with -g -O0

But I guess we are calling some new ioctl on the system which does not
support it, and do not fall-back to the new ioctl. We tried to be
careful about this, though.

-- 
Best Regards,
Artem Bityutskiy (Артём Битюцкий)