Re: [Qemu-devel] [Qemu-ppc] [PATCH v1] spapr_pci: fix the path while fetching loc-code from host DT

[David Gibson <david@gibson.dropbear.id.au>]

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On Wed, Nov 08, 2017 at 01:30:04PM +1100, Alexey Kardashevskiy wrote:
> On 08/11/17 00:18, Seeteena Thoufeek wrote:
> > The function spapr_phb_vfio_get_loc_code uses wrong path for
> > fetching loc-code from host DT
> > 
> > this is the call that needs to be fixed:
> > /* Construct and read from host device tree the loc-code */
> > path = g_strdup_printf("/proc/device-tree%s/ibm,loc-code", buf);
> 
> 
> I do not see why would extra '/' hurt but where does it really fail?
> 
> My machines have leading '/' in devspec, do not yours?
> 
> aik@garrison2:~$ cat /sys/bus/pci/devices/0009:03:00.0/devspec && echo -e '\n'
> /pciex@3fffe40500000/pci@0/pci@0/pci@1/usb-xhci@0

Right, what Alexey said.  I see no reason to change this.

> 
> 
> 
> 
> > 
> > Signed-off-by: Seeteena Thoufeek <s1seetee@linux.vnet.ibm.com>
> > ---
> >  hw/ppc/spapr_pci.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
> > index 5a3122a..ae86322 100644
> > --- a/hw/ppc/spapr_pci.c
> > +++ b/hw/ppc/spapr_pci.c
> > @@ -762,7 +762,7 @@ static char *spapr_phb_vfio_get_loc_code(sPAPRPHBState *sphb,  PCIDevice *pdev)
> >      g_free(path);
> >  
> >      /* Construct and read from host device tree the loc-code */
> > -    path = g_strdup_printf("/proc/device-tree%s/ibm,loc-code", buf);
> > +    path = g_strdup_printf("/proc/device-tree/%s/ibm,loc-code", buf);
> >      g_free(buf);
> >      if (!g_file_get_contents(path, &buf, NULL, NULL)) {
> >          goto err_out;
> > 
> 
> 

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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