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APXvYqxHj8TIXgkU8DI8b9yocp5iF8YZc2KmhdvQZRSkcdDKX9ccM65+lwFYL7Apy9kkuqhkMGYolw== X-Received: by 2002:a17:902:b702:: with SMTP id d2mr2684558pls.104.1574839838210; Tue, 26 Nov 2019 23:30:38 -0800 (PST) Received: from [10.61.2.175] ([122.99.82.10]) by smtp.gmail.com with ESMTPSA id q20sm14882010pff.134.2019.11.26.23.30.34 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 26 Nov 2019 23:30:37 -0800 (PST) Subject: Re: [Very RFC 42/46] powernv/pci: Don't clear pdn->pe_number in pnv_pci_release_device To: Oliver O'Halloran , linuxppc-dev@lists.ozlabs.org References: <20191120012859.23300-1-oohall@gmail.com> <20191120012859.23300-43-oohall@gmail.com> From: Alexey Kardashevskiy Autocrypt: addr=aik@ozlabs.ru; keydata= mQINBE+rT0sBEADFEI2UtPRsLLvnRf+tI9nA8T91+jDK3NLkqV+2DKHkTGPP5qzDZpRSH6mD EePO1JqpVuIow/wGud9xaPA5uvuVgRS1q7RU8otD+7VLDFzPRiRE4Jfr2CW89Ox6BF+q5ZPV /pS4v4G9eOrw1v09lEKHB9WtiBVhhxKK1LnUjPEH3ifkOkgW7jFfoYgTdtB3XaXVgYnNPDFo 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20/11/2019 12:28, Oliver O'Halloran wrote: > Nothing looks at it anymore. With a small extra step we can ditch it (compile tested): https://github.com/aik/linux/commit/14db7061d48220354e83f8e100ab0cc1b7181da4 > > Signed-off-by: Oliver O'Halloran > --- > arch/powerpc/platforms/powernv/pci-ioda.c | 12 ------------ > 1 file changed, 12 deletions(-) > > diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c > index d3e375d71cdc..45d940730c30 100644 > --- a/arch/powerpc/platforms/powernv/pci-ioda.c > +++ b/arch/powerpc/platforms/powernv/pci-ioda.c > @@ -3541,9 +3541,7 @@ static void pnv_ioda_release_pe(struct pnv_ioda_pe *pe) > > static void pnv_pci_release_device(struct pci_dev *pdev) > { > - struct pnv_phb *phb = pci_bus_to_pnvhb(pdev->bus); > struct pnv_ioda_pe *pe = pnv_ioda_get_pe(pdev); > - struct pci_dn *pdn = pci_get_pdn(pdev); > > /* The VF PE state is torn down when sriov_disable() is called */ > if (pdev->is_virtfn) > @@ -3560,16 +3558,6 @@ static void pnv_pci_release_device(struct pci_dev *pdev) > if (pdev->is_physfn) > kfree(pdev->dev.archdata.iov_data); > > - /* > - * PCI hotplug can happen as part of EEH error recovery. The @pdn > - * isn't removed and added afterwards in this scenario. We should > - * set the PE number in @pdn to an invalid one. Otherwise, the PE's > - * device count is decreased on removing devices while failing to > - * be increased on adding devices. It leads to unbalanced PE's device > - * count and eventually make normal PCI hotplug path broken. > - */ > - pdn->pe_number = IODA_INVALID_PE; > - > WARN_ON(--pe->device_count < 0); > if (pe->device_count == 0) > pnv_ioda_release_pe(pe); > -- Alexey