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Date: Wed, 23 Mar 2022 15:43:29 +0200 From: Andy Shevchenko <andy.shevchenko@...il.com> To: David Woodhouse <dwmw2@...radead.org> Cc: Bjorn Helgaas <helgaas@...nel.org>, linux-pci <linux-pci@...r.kernel.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Mick Lorain <micklorain@...tonmail.com>, Alex Williamson <alex.williamson@...hat.com>, Thomas Gleixner <tglx@...utronix.de>, Bjorn Helgaas <bhelgaas@...gle.com> Subject: Re: [PATCH] PCI: Avoid broken MSI on SB600 USB devices On Wed, Mar 23, 2022 at 2:43 PM David Woodhouse <dwmw2@...radead.org> wrote: > On Wed, 2022-03-23 at 10:03 +0200, Andy Shevchenko wrote: > > On Wed, Mar 23, 2022 at 4:26 AM Bjorn Helgaas <helgaas@...nel.org> wrote: > > > On Mon, Mar 21, 2022 at 01:34:46PM -0500, Bjorn Helgaas wrote: > > > > From: Bjorn Helgaas <bhelgaas@...gle.com> > > > > Some ATI SB600 USB adapters advertise MSI, but if INTx is disabled by > > > > setting PCI_COMMAND_INTX_DISABLE, > > > > > > MSI doesn't work either. > > > > I think this is not correct. > > I think it was perfectly correct until you added a couple of newlines > in the middle of the sentence, then took it out of context. :) > > "If INTX is disabled, MSI doesn't work either". Ah, I stand corrected. Thanks for the English lesson! > But really, in that case surely the solution is *not* to disable INTX > for this device. Then MSI will work, right? That was my intention, but Bjorn has concerns. -- With Best Regards, Andy Shevchenko
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