From 5567ae4a8d569d996d0d88d0eceb76205e4c7ce5 Mon Sep 17 00:00:00 2001 From: Vasundhara Volam Date: Thu, 20 Feb 2020 17:26:34 -0500 Subject: bnxt_en: Improve device shutdown method. Especially when bnxt_shutdown() is called during kexec, we need to disable MSIX and disable Bus Master to completely quiesce the device. Make these 2 calls unconditionally in the shutdown method. Fixes: c20dc142dd7b ("bnxt_en: Disable bus master during PCI shutdown and driver unload.") Signed-off-by: Vasundhara Volam Signed-off-by: Michael Chan Signed-off-by: David S. Miller --- drivers/net/ethernet/broadcom/bnxt/bnxt.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c index 597e6fd5bfea..2ad007e5ee7f 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -11983,10 +11983,10 @@ static void bnxt_shutdown(struct pci_dev *pdev) dev_close(dev); bnxt_ulp_shutdown(bp); + bnxt_clear_int_mode(bp); + pci_disable_device(pdev); if (system_state == SYSTEM_POWER_OFF) { - bnxt_clear_int_mode(bp); - pci_disable_device(pdev); pci_wake_from_d3(pdev, bp->wol); pci_set_power_state(pdev, PCI_D3hot); } -- cgit v1.2.3-59-g8ed1b From 8743db4a9acfd51f805ac0c87bcaae92c42d1061 Mon Sep 17 00:00:00 2001 From: Vasundhara Volam Date: Thu, 20 Feb 2020 17:26:35 -0500 Subject: bnxt_en: Issue PCIe FLR in kdump kernel to cleanup pending DMAs. If crashed kernel does not shutdown the NIC properly, PCIe FLR is required in the kdump kernel in order to initialize all the functions properly. Fixes: d629522e1d66 ("bnxt_en: Reduce memory usage when running in kdump kernel.") Signed-off-by: Vasundhara Volam Signed-off-by: Michael Chan Signed-off-by: David S. Miller --- drivers/net/ethernet/broadcom/bnxt/bnxt.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c index 2ad007e5ee7f..fd6e0e48cd51 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -11786,6 +11786,14 @@ static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) if (version_printed++ == 0) pr_info("%s", version); + /* Clear any pending DMA transactions from crash kernel + * while loading driver in capture kernel. + */ + if (is_kdump_kernel()) { + pci_clear_master(pdev); + pcie_flr(pdev); + } + max_irqs = bnxt_get_max_irq(pdev); dev = alloc_etherdev_mq(sizeof(*bp), max_irqs); if (!dev) -- cgit v1.2.3-59-g8ed1b