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Date: Sat, 17 Oct 2015 18:59:26 -0700 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Stefan Assmann <sassmann@...nic.de>, Aaron Brown <aaron.f.brown@...el.com>, Jeff Kirsher <jeffrey.t.kirsher@...el.com>, Daniel J Blueman <daniel@...ascale.com> Subject: [PATCH 4.1 183/202] igb: do not re-init SR-IOV during probe 4.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Stefan Assmann <sassmann@...nic.de> commit 6423fc34160939142d72ffeaa2db6408317f54df upstream. During driver probing the following code path is triggered. igb_probe ->igb_sw_init ->igb_probe_vfs ->igb_pci_enable_sriov ->igb_sriov_reinit Doing the SR-IOV re-init is not necessary during probing since we're starting from scratch. Here we can call igb_enable_sriov() right away. Running igb_sriov_reinit() during igb_probe() also seems to cause occasional packet loss on some onboard 82576 NICs. Reproduced on Dell and HP servers with onboard 82576 NICs. Example: Intel Corporation 82576 Gigabit Network Connection [8086:10c9] (rev 01) Subsystem: Dell Device [1028:0481] Signed-off-by: Stefan Assmann <sassmann@...nic.de> Tested-by: Aaron Brown <aaron.f.brown@...el.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com> Cc: Daniel J Blueman <daniel@...ascale.com> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- drivers/net/ethernet/intel/igb/igb_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -2864,7 +2864,7 @@ static void igb_probe_vfs(struct igb_ada return; pci_sriov_set_totalvfs(pdev, 7); - igb_pci_enable_sriov(pdev, max_vfs); + igb_enable_sriov(pdev, max_vfs); #endif /* CONFIG_PCI_IOV */ } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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