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bnxt_en: Don't query FW when netif_running() is false.

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[ Upstream commit c1c2d77408022a398a1a7c51cf20488c922629de ]

In rare conditions like two stage OS installation, the
ethtool's get_channels function may be called when the
device is in D3 state, leading to uncorrectable PCI error.
Check netif_running() first before making any query to FW
which involves writing to BAR.

Fixes: db4723b3cd ("bnxt_en: Check max_tx_scheduler_inputs value from firmware.")
Signed-off-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Pavan Chebbi 2020-08-26 01:08:32 -04:00 • committed by Greg Kroah-Hartman
commit e7cbba4db7
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
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@ -769,7 +769,7 @@ static void bnxt_get_channels(struct net_device *dev,
int max_tx_sch_inputs;
/* Get the most up-to-date max_tx_sch_inputs. */
if (BNXT_NEW_RM(bp))
if (netif_running(dev) && BNXT_NEW_RM(bp))
bnxt_hwrm_func_resc_qcaps(bp, false);
max_tx_sch_inputs = hw_resc->max_tx_sch_inputs;