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bnxt_en: Need to unconditionally shut down RoCE in bnxt_shutdown

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The current 'bnxt_shutdown' implementation only invokes
'bnxt_ulp_shutdown' to shut down RoCE in the case when the system is in
the path of power off (SYSTEM_POWER_OFF). While this may work in most
cases, it does not work in the smart NIC case, when Linux 'reboot'
command is initiated from the Linux that runs on the ARM cores of the
NIC card. In this particular case, Linux 'reboot' results in a system
'L3' level reset where the entire ARM and associated subsystems are
being reset, but at the same time, Nitro core is being kept in sane state
(to allow external PCIe connected servers to continue to work). Without
properly shutting down RoCE and freeing all associated resources, it
results in the ARM core to hang immediately after the 'reboot'

By always invoking 'bnxt_ulp_shutdown' in 'bnxt_shutdown', it fixes the
above issue

Fixes: 0efd2fc65c ("bnxt_en: Add a callback to inform RDMA driver during PCI shutdown.")

Signed-off-by: Ray Jui <ray.jui@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:
Ray Jui 2017-12-01 03:13:02 -05:00 committed by David S. Miller
parent ccab371f74
commit a7f3f939dd
1 changed files with 2 additions and 1 deletions
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3
drivers/net/ethernet/broadcom/bnxt/bnxt.c
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@ -8263,8 +8263,9 @@ static void bnxt_shutdown(struct pci_dev *pdev)
if (netif_running(dev))
dev_close(dev);
bnxt_ulp_shutdown(bp);
if (system_state == SYSTEM_POWER_OFF) {
bnxt_ulp_shutdown(bp);
bnxt_clear_int_mode(bp);
pci_wake_from_d3(pdev, bp->wol);
pci_set_power_state(pdev, PCI_D3hot);