Hi Shawn,

 -----Original Message-----
 From: Shawn Guo [mailto:shawnguo@kernel.org]
 Sent: Tuesday, September 20, 2016 8:39 PM
 To: Po Liu
 Cc: linux-pci@vger.kernel.org; linux-arm-kernel@lists.infradead.org;
 linux-kernel@vger.kernel.org; devicetree@vger.kernel.org; Roy Zang; Arnd
 Bergmann; Marc Zyngier; Stuart Yoder; Leo Li; M.H. Lian; Murali
 Karicheri; Bjorn Helgaas; Mingkai Hu
 Subject: Re: [PATCH v5 3/3] pci:aer: add support aer interrupt with none
 MSI/MSI-X/INTx mode
 
 On Sun, Sep 18, 2016 at 03:37:27AM +0000, Po Liu wrote:
 > Hi Shawn,
 >
 >
 > >  -----Original Message-----
 > >  From: Shawn Guo [mailto:shawnguo@kernel.org]
 > >  Sent: Sunday, September 18, 2016 8:52 AM
 > >  To: Po Liu
 > >  Cc: linux-pci@vger.kernel.org;
 > > linux-arm-kernel@lists.infradead.org;
 > >  linux-kernel@vger.kernel.org; devicetree@vger.kernel.org; Roy Zang;
 > > Arnd  Bergmann; Marc Zyngier; Stuart Yoder; Leo Li; M.H. Lian;
 > > Murali  Karicheri; Bjorn Helgaas; Mingkai Hu
 > >  Subject: Re: [PATCH v5 3/3] pci:aer: add support aer interrupt with
 > > none  MSI/MSI-X/INTx mode
 > >
 > >  On Tue, Sep 13, 2016 at 12:40:59PM +0800, Po Liu wrote:
 > >  > On some platforms, root port doesn't support MSI/MSI-X/INTx in RC
 mode.
 > >  > When chip support the aer interrupt with none MSI/MSI-X/INTx
 > > mode,  > maybe there is interrupt line for aer pme etc. Search the
 > > interrupt  > number in the fdt file. Then fixup the dev->irq with it.
 > >  >
 > >  > Signed-off-by: Po Liu [off-list ref]
 > >
 > >  Will the new kernel work with existing/old DTB?  I'm trying to
 > > understand the dependency between driver and DTS changes.
 >
 > Yes, We've never use name 'intr' before. So we remove it is ok.
 > 'aer' is a dts name for researching it's true interrupt number by
 kernel. This patch is first time to use name 'aer'. So it must be
 compatible with existing/old DTB.
 
 Does that mean driver and DTS changes can go through separate trees, i.e.
 PCI and arm-soc, without introducing regressions on either tree?
 Or does the patch series needs to go in as a whole?

Should be as a whole. The driver base on the dts. Or else, the driver would not found the 'aer' point.
Thanks!

Po

 
 Shawn