linux-kernel - Re: [PATCH] rt28xx: Make PCI_{MAP,UNMAP}

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Date:	Mon, 29 Mar 2010 02:58:48 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
Cc:	bzolnier@...il.com, gregkh@...e.de, linux-wireless@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] rt28xx: Make PCI_{MAP,UNMAP}_SINGLE type-safe

On Mon, 2010-03-29 at 10:52 +0900, FUJITA Tomonori wrote:
> On Mon, 29 Mar 2010 01:24:45 +0100
> Ben Hutchings <ben@...adent.org.uk> wrote:
> 
> > To avoid recurrence of bugs such as <http://bugs.debian.org/575726>,
> > change the type of the first parameter to linux_pci_{map,unmap}_single()
> > from void * to struct rt_rtmp_adapter *.  Also do not define the macros
> > PCI_{MAP,UNMAP}_SINGLE() when building the rt2870sta driver; they are
> > not used and if they were that would be a bug.
> > 
> > Signed-off-by: Ben Hutchings <ben@...adent.org.uk> 
> > ---
> >  drivers/staging/rt2860/rt_linux.h    |   14 +++++---------
> >  drivers/staging/rt2860/rt_pci_rbus.c |   12 ++++--------
> >  2 files changed, 9 insertions(+), 17 deletions(-)
> 
> I think using dma_map_single directly instead of inventing a wrapper
> function make the code more readable.

These functions are not quite simple wrappers, unfortunately.  So while
I think that is worth doing it is a separate change.

Ben.

-- 
Ben Hutchings
Once a job is fouled up, anything done to improve it makes it worse.

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