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sfc: fully reset if MC_REBOOT event received without warm_boot_count increment

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On EF10, MC_CMD_VPORT_RECONFIGURE can cause a CODE_MC_REBOOT event
to be sent to a function without incrementing the (adapter-wide)
warm_boot_count.  In this case, the reboot is not detected by the
loop on efx_mcdi_poll_reboot(), so prepare for recovery from an MC
reboot anyway.  When this codepath is run, the MC has always just
rebooted, so this recovery is valid.

The loop on efx_mcdi_poll_reboot() is still required for other MC
reboot cases, so that actions in response to an MC reboot are
performed, such as clearing locally calculated statistics.
Siena NICs are unaffected by this change as the above scenario
does not apply.

Signed-off-by: Shradha Shah <sshah@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Pieczko
2015-10-09 10:40:35 +01:00
committed by David S. Miller
parent d5404915a9
commit c577e59ed7
3 changed files with 32 additions and 12 deletions
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1
drivers/net/ethernet/sfc/net_driver.h
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@@ -1277,6 +1277,7 @@ struct efx_nic_type {
void (*mcdi_read_response)(struct efx_nic *efx, efx_dword_t *pdu,
size_t pdu_offset, size_t pdu_len);
int (*mcdi_poll_reboot)(struct efx_nic *efx);
void (*mcdi_reboot_detected)(struct efx_nic *efx);
void (*irq_enable_master)(struct efx_nic *efx);
void (*irq_test_generate)(struct efx_nic *efx);
void (*irq_disable_non_ev)(struct efx_nic *efx);