linux-kernel - Re: [PATCH] mvsas: always iounmap resources

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Date:	Mon, 22 Jun 2015 09:43:37 +0200
From:	Johannes Thumshirn <jthumshirn@...e.de>
To:	"James E.J. Bottomley" <JBottomley@...n.com>
Cc:	Christoph Hellwig <hch@....de>,
	Mike Christie <michaelc@...wisc.edu>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Bart Van Assche <bvanassche@....org>,
	Ben Hutchings <ben@...adent.org.uk>,
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	Hannes Reinecke <hare@...e.de>
Subject: Re: [PATCH] mvsas: always iounmap resources

On Fri, Jun 12, 2015 at 08:31:38AM +0200, Hannes Reinecke wrote:
> On 05/22/2015 11:15 AM, Johannes Thumshirn wrote:
> > In case pci_resource_start() or pci_resource_len() reutrn 0, mvsas_ioremap
> > returns without doing an iounmap() of mvi->regs_ex.
> > 
> > Found by the cocinelle tool.
> > 
> > Signed-off-by: Johannes Thumshirn <jthumshirn@...e.de>
> > ---
> >  drivers/scsi/mvsas/mv_init.c | 5 ++++-
> >  1 file changed, 4 insertions(+), 1 deletion(-)
> > 
> > diff --git a/drivers/scsi/mvsas/mv_init.c b/drivers/scsi/mvsas/mv_init.c
> > index 53030b0..04a3205 100644
> > --- a/drivers/scsi/mvsas/mv_init.c
> > +++ b/drivers/scsi/mvsas/mv_init.c
> > @@ -339,8 +339,11 @@ int mvs_ioremap(struct mvs_info *mvi, int bar, int bar_ex)
> >  
> >  	res_start = pci_resource_start(pdev, bar);
> >  	res_len = pci_resource_len(pdev, bar);
> > -	if (!res_start || !res_len)
> > +	if (!res_start || !res_len) {
> > +		iounmap(mvi->regs_ex);
> > +		mvi->regs_ex = NULL;
> >  		goto err_out;
> > +	}
> >  
> >  	res_flag = pci_resource_flags(pdev, bar);
> >  	if (res_flag & IORESOURCE_CACHEABLE)
> > 
> Reviewed-by: Hannes Reinecke <hare@...e.de>
> 

James, any update on this?
Do you intent to take it for 4.2?

Thank,
	Johannes
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