bnxt_en: Don't query FW when netif_running() is false.
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: db4723b3 ("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>
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