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authorVasundhara Volam <vasundhara-v.volam@broadcom.com>2020-02-20 17:26:35 -0500
committerDavid S. Miller <davem@davemloft.net>2020-02-20 16:05:42 -0800
commit8743db4a9acfd51f805ac0c87bcaae92c42d1061 (patch)
treef008ac7473b6837a34043a49d30566802c9b9a8a /drivers/net
parentbnxt_en: Improve device shutdown method. (diff)
downloadlinux-dev-8743db4a9acfd51f805ac0c87bcaae92c42d1061.tar.xz
linux-dev-8743db4a9acfd51f805ac0c87bcaae92c42d1061.zip
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 <vasundhara-v.volam@broadcom.com> Signed-off-by: Michael Chan <michael.chan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/ethernet/broadcom/bnxt/bnxt.c8
1 files changed, 8 insertions, 0 deletions
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)