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bnxt_en: Issue PCIe FLR in kdump kernel to cleanup pending DMAs.

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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>
This commit is contained in:
Vasundhara Volam 2020-02-20 17:26:35 -05:00 committed by David S. Miller
parent 5567ae4a8d
commit 8743db4a9a
1 changed files with 8 additions and 0 deletions
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8
drivers/net/ethernet/broadcom/bnxt/bnxt.c
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@ -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)