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bnxt_en: Issue PCIe FLR in kdump kernel to cleanup pending DMAs.
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[ Upstream commit 8743db4 ]

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: d629522 ("bnxt_en: Reduce memory usage when running in kdump kernel.")
Signed-off-by: Vasundhara Volam <[email protected]>
Signed-off-by: Michael Chan <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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Vasundhara Volam authored and gregkh committed Mar 5, 2020
1 parent 7daf11d commit 177489e
Showing 1 changed file with 8 additions and 0 deletions.
8 changes: 8 additions & 0 deletions drivers/net/ethernet/broadcom/bnxt/bnxt.c
Original file line number Diff line number Diff line change
Expand Up @@ -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)
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