linux-kernel - Re: [PATCH 13/17] MTD: export few functions from nand

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Message-ID: <1265362234.15383.14.camel@maxim-laptop>
Date:	Fri, 05 Feb 2010 11:30:34 +0200
From:	Maxim Levitsky <maximlevitsky@...il.com>
To:	"stanley.miao" <stanley.miao@...driver.com>
Cc:	David Woodhouse <dwmw2@...radead.org>,
	Alex Dubov <oakad@...oo.com>,
	Artem Bityutskiy <dedekind1@...il.com>,
	joern <joern@...fs.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-mtd <linux-mtd@...ts.infradead.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH 13/17] MTD: export few functions from nand_base.c

On Fri, 2010-02-05 at 10:32 +0800, stanley.miao wrote: 
> Maxim Levitsky wrote:
> > This exports:
> >
> > nand_do_read_oob
> > nand_do_write_oob
> >   
> 
> nand_do_read_oob and nand_do_write_oob can't be exported. They are internal
> functions in NAND subsystem. If you want use them, please use mtd->read_oob
> and mtd->write_oob.

I would be happy to use these, and I tried to do so.
However this leads to deadlock, because ->block_bad can (and is) called
with controller lock (nand_get_device), thus if I call ->read_oob I will
get deadlock.

Best regards,
Maxim Levitsky

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