From: "Raj, Ashok" <ashok.raj@intel.com>
To: sathyanarayanan.nkuppuswamy@gmail.com
Cc: bhelgaas@google.com, okaya@kernel.org, linux-pci@vger.kernel.org,
linux-kernel@vger.kernel.org,
sathyanarayanan.kuppuswamy@linux.intel.com,
Ashok Raj <ashok.raj@intel.com>
Subject: Re: [PATCH v4 1/2] PCI/ERR: Call pci_bus_reset() before calling ->slot_reset() callback
Date: Mon, 12 Oct 2020 14:05:22 -0700 [thread overview]
Message-ID: <20201012210522.GA86612@otc-nc-03> (raw)
In-Reply-To: <5c5bca0bdb958e456176fe6ede10ba8f838fbafc.1602263264.git.sathyanarayanan.kuppuswamy@linux.intel.com>
On Sun, Oct 11, 2020 at 10:03:40PM -0700, sathyanarayanan.nkuppuswamy@gmail.com wrote:
> From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
>
> Currently if report_error_detected() or report_mmio_enabled()
> functions requests PCI_ERS_RESULT_NEED_RESET, current
> pcie_do_recovery() implementation does not do the requested
> explicit device reset, but instead just calls the
> report_slot_reset() on all affected devices. Notifying about the
> reset via report_slot_reset() without doing the actual device
> reset is incorrect. So call pci_bus_reset() before triggering
> ->slot_reset() callback.
>
> Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
> ---
> drivers/pci/pcie/err.c | 6 +-----
> 1 file changed, 1 insertion(+), 5 deletions(-)
>
> diff --git a/drivers/pci/pcie/err.c b/drivers/pci/pcie/err.c
> index c543f419d8f9..067c58728b88 100644
> --- a/drivers/pci/pcie/err.c
> +++ b/drivers/pci/pcie/err.c
> @@ -181,11 +181,7 @@ pci_ers_result_t pcie_do_recovery(struct pci_dev *dev,
> }
>
> if (status == PCI_ERS_RESULT_NEED_RESET) {
> - /*
> - * TODO: Should call platform-specific
> - * functions to reset slot before calling
> - * drivers' slot_reset callbacks?
> - */
> + pci_reset_bus(dev);
pci_reset_bus() returns an error, do you need to consult that before
unconditionally setting PCI_ERS_RESULT_RECOVERED?
> status = PCI_ERS_RESULT_RECOVERED;
> pci_dbg(dev, "broadcast slot_reset message\n");
> pci_walk_bus(bus, report_slot_reset, &status);
> --
> 2.17.1
>
next prev parent reply other threads:[~2020-10-12 21:05 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-12 5:03 [PATCH v4 1/2] PCI/ERR: Call pci_bus_reset() before calling ->slot_reset() callback sathyanarayanan.nkuppuswamy
2020-10-12 5:03 ` [PATCH v4 2/2] PCI/ERR: Split the fatal and non-fatal error recovery handling sathyanarayanan.nkuppuswamy
2020-10-12 14:50 ` Sinan Kaya
2020-10-13 11:56 ` Christoph Hellwig
2020-10-13 15:17 ` Kuppuswamy, Sathyanarayanan
2020-10-15 6:43 ` Christoph Hellwig
2020-10-15 6:49 ` Sathyanarayanan Kuppuswamy Natarajan
2020-10-14 5:44 ` Ethan Zhao
2020-10-14 5:51 ` Kuppuswamy, Sathyanarayanan
2020-10-12 14:51 ` [PATCH v4 1/2] PCI/ERR: Call pci_bus_reset() before calling ->slot_reset() callback Sinan Kaya
2020-10-12 21:05 ` Raj, Ashok [this message]
2020-10-12 21:47 ` Kuppuswamy, Sathyanarayanan
2020-10-14 8:00 ` Ethan Zhao
2020-10-14 8:19 ` Kuppuswamy, Sathyanarayanan
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