From mboxrd@z Thu Jan 1 00:00:00 1970 From: shawnguo@kernel.org (Shawn Guo) Date: Tue, 20 Sep 2016 20:39:26 +0800 Subject: [PATCH v5 3/3] pci:aer: add support aer interrupt with none MSI/MSI-X/INTx mode In-Reply-To: References: <1472625442-23309-2-git-send-email-po.liu@nxp.com> <1473741659-17618-1-git-send-email-po.liu@nxp.com> <1473741659-17618-3-git-send-email-po.liu@nxp.com> <20160918005212.GF15478@tiger> Message-ID: <20160920123926.GA3744@tiger> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Sun, Sep 18, 2016 at 03:37:27AM +0000, Po Liu wrote: > Hi Shawn, > > > > -----Original Message----- > > From: Shawn Guo [mailto:shawnguo at kernel.org] > > Sent: Sunday, September 18, 2016 8:52 AM > > To: Po Liu > > Cc: linux-pci at vger.kernel.org; linux-arm-kernel at lists.infradead.org; > > linux-kernel at vger.kernel.org; devicetree at 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 > > > > 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? Shawn