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

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Message-ID: <20140205164710.082f689e@skate>
Date:	Wed, 5 Feb 2014 16:47:10 +0100
From:	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
To:	Jean-Jacques Hiblot <jjhiblot@...phandler.com>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	gregory.clement@...e-electrons.com,
	Jason Cooper <jason@...edaemon.net>
Subject: Re: [PATCH] mvebu : pcie: dt: potential issue in range parsing

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)

Thanks!

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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