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    sfc: Allow driver to cope with a lower number of VIs than it needs for RSS · b0fbdae1
    Shradha Shah 提交于
    Previously, the driver would refuse to load if it couldn't secure
    enough VIs from the MC to fulfill its RSS requirements.
    This was causing probe to fail on later functions in
    configurations where we'd run out of VIs, such as having many
    VFs.
    
    This change allows the driver to load with fewer VIs, down to a
    minimum of 2. A warning will be printed saying that RSS
    requirements were not met, possibly affecting performance.
    
    efx->max_tx_channels needs to be set to avoid going down the
    failure path in efx_probe_nic() immediately in the loop after the
    probe() NIC-type function.
    Also, Set rc=ENOSPC when bombing out of efx_probe_nic due to lack
    of VIs.
    Signed-off-by: NShradha Shah <sshah@solarflare.com>
    Signed-off-by: NDavid S. Miller <davem@davemloft.net>
    b0fbdae1
efx.c 89.3 KB