From 177489edbe2444c28451532f1612f0a801626aed Mon Sep 17 00:00:00 2001 From: Vasundhara Volam Date: Thu, 20 Feb 2020 17:26:35 -0500 Subject: [PATCH] bnxt_en: Issue PCIe FLR in kdump kernel to cleanup pending DMAs. [ Upstream commit 8743db4a9acfd51f805ac0c87bcaae92c42d1061 ] 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 Signed-off-by: Greg Kroah-Hartman --- 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 e03e610dd18311..374e11a91790ba 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -11712,6 +11712,14 @@ 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)