linux-kernel - Re: [PATCH 2/3] staging: dgap: adds missing iounmap for re_map_port in dgap_release

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Date:	Wed, 24 Sep 2014 12:42:29 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Daeseok Youn <daeseok.youn@...il.com>
Cc:	devel@...verdev.osuosl.org, lidza.louina@...il.com,
	driverdev-devel@...uxdriverproject.org,
	linux-kernel@...r.kernel.org, gregkh@...uxfoundation.org
Subject: Re: [PATCH 2/3] staging: dgap: adds missing iounmap for re_map_port
 in dgap_release_remap()

On Wed, Sep 24, 2014 at 12:36:48PM +0300, Dan Carpenter wrote:
> On Tue, Sep 23, 2014 at 09:22:08AM +0900, Daeseok Youn wrote:
> > Signed-off-by: Daeseok Youn <daeseok.youn@...il.com>
> > ---
> >  drivers/staging/dgap/dgap.c |    1 +
> >  1 files changed, 1 insertions(+), 0 deletions(-)
> > 
> > diff --git a/drivers/staging/dgap/dgap.c b/drivers/staging/dgap/dgap.c
> > index 779d144..637ea8a 100644
> > --- a/drivers/staging/dgap/dgap.c
> > +++ b/drivers/staging/dgap/dgap.c
> > @@ -1026,6 +1026,7 @@ static void dgap_release_remap(struct board_t *brd)
> >  	release_mem_region(brd->membase, 0x200000);
> >  	release_mem_region(brd->membase + PCI_IO_OFFSET, 0x200000);
> >  	iounmap(brd->re_map_membase);
> > +	iounmap(brd->re_map_port);
> 
> 
> I don't think it matters, but at least aesthetically it would be better
> to unmap first and then release the regions.  (You can do this in a
> different patch).
> 

Also dgap_do_remap() unwinds in the wrong order and is sucky.  It should
use gotos.

Also the name dgap_do_remap() isn't great.  Remap is a verb not a noun
so the "_do" isn't needed.  Just dgap_remap() and dgap_release_remap()
could be changed to dgap_unmap().

regards,
dan carpenter

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