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Date: Wed, 4 Mar 2020 15:19:55 +0000 From: "Stahl, Manuel" <manuel.stahl@...-extern.fraunhofer.de> To: "stephen@...workplumber.org" <stephen@...workplumber.org>, "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org> CC: "hjk@...utronix.de" <hjk@...utronix.de>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>, "sojkam1@....cvut.cz" <sojkam1@....cvut.cz> Subject: Re: [PATCH 2/2] uio: Prefer MSI(X) interrupts in PCI drivers Hi Greg, so somehow this discussion stopped without any instructions how to proceed. I think this kind of driver helps every FPGA developer to interface his design via PCIe to a Linux PC. So if there is any chance to get this code merged, I'm glad to rebase this onto the latest kernel release. Best regards, Manuel Stahl On Fr, 2017-10-20 at 14:58 +0200, Manuel Stahl wrote: > Hi Greg, > > it just uses MSI-X or MSI when available and falls back to legacy IRQ otherwise. > > Regards, > Manuel > > On Fr, 2017-10-20 at 14:50 +0200, gregkh@...uxfoundation.org wrote: > > On Fri, Oct 06, 2017 at 07:57:00AM -0700, Stephen Hemminger wrote: > > > On Fri, 6 Oct 2017 13:50:44 +0000 > > > "Stahl, Manuel" <manuel.stahl@...-extern.fraunhofer.de> wrote: > > > > > > > MSI(X) interrupts are not shared between devices. So when available > > > > those should be preferred over legacy interrupts. > > > > > > > > Signed-off-by: Manuel Stahl <manuel.stahl@....fraunhofer.de> > > > > --- > > > > drivers/uio/uio_pci_dmem_genirq.c | 27 ++++++++++++++++++++------- > > > > drivers/uio/uio_pci_generic.c | 24 ++++++++++++++++++------ > > > > 2 files changed, 38 insertions(+), 13 deletions(-) > > > > > > The last time I tried to do MSI-X with pci-generic it got rejected > > > by the maintainer. > > > > Hm, yeah, this would break users today that do not have msi-x, right? > > > > Not good, Manuel, how well did you test this? > > > > thanks, > > > > greg k-h
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