linux-kernel - Re: [PATCH] mvebu : pcie: dt: potential issue in range parsing

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Message-ID: <20140214185103.GE31093@google.com>
Date:	Fri, 14 Feb 2014 11:51:04 -0700
From:	Bjorn Helgaas <bhelgaas@...gle.com>
To:	Jason Cooper <jason@...edaemon.net>
Cc:	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Jean-Jacques Hiblot <jjhiblot@...phandler.com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	gregory.clement@...e-electrons.com, linux-pci@...r.kernel.org
Subject: Re: [PATCH] mvebu : pcie: dt: potential issue in range parsing

On Wed, Feb 05, 2014 at 12:21:07PM -0500, Jason Cooper wrote:
> 
> + Bjorn, linux-pci
> 
> Bjorn,
> 
> It looks like this didn't get Cc'd to linux-pci.  Here's a link:
> 
>   http://www.spinics.net/lists/arm-kernel/msg299721.html

Thanks for the heads-up; I had indeed missed this (I mostly rely on
patchwork, which only tracks linux-pci, and it's not smart enough to
extract quoted patches).

Applied to pci/host-mvebu for v3.15, thanks!

> 
> On Wed, Feb 05, 2014 at 04:47:10PM +0100, Thomas Petazzoni wrote:
> > Dear Jean-Jacques Hiblot,
> > 
> > On Fri, 10 Jan 2014 11:23:51 +0100, Jean-Jacques Hiblot wrote:
> > > The second parameter of of_read_number is not the index, but a size.
> > > As it happens, in this case it may work just fine because of the the conversion
> > > to u32 and the favorable endianness on this architecture.
> > > 
> > > Signed-off-by: Jean-Jacques Hiblot <jjhiblot@...phandler.com>
> > > ---
> > >  drivers/pci/host/pci-mvebu.c | 2 +-
> > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > > 
> > > diff --git a/drivers/pci/host/pci-mvebu.c b/drivers/pci/host/pci-mvebu.c
> > > index c269e43..877e8ce 100644
> > > --- a/drivers/pci/host/pci-mvebu.c
> > > +++ b/drivers/pci/host/pci-mvebu.c
> > > @@ -768,7 +768,7 @@ static int mvebu_get_tgt_attr(struct device_node *np, int devfn,
> > >  
> > >  	for (i = 0; i < nranges; i++) {
> > >  		u32 flags = of_read_number(range, 1);
> > > -		u32 slot = of_read_number(range, 2);
> > > +		u32 slot = of_read_number(range + 1, 1);
> > >  		u64 cpuaddr = of_read_number(range + na, pna);
> > >  		unsigned long rtype;
> > >  
> > 
> > Sorry for the long delay, and thanks for the fix!
> > 
> > Acked-by: Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
> > Tested-by: Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
> > 
> > (on Armada 370, with PCIe cards plugged in)
> 
> 
> Fixes: 11be65472a427 ("PCI: mvebu: Adapt to the new device tree layout")
> Cc: <stable@...r.kernel.org> # v3.12+
> Acked-by: Jason Cooper <jason@...edaemon.net>
> 
> thx,
> 
> Jason.
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