| Message ID | 1336615693.2499.25.camel@bwh-desktop.uk.solarflarecom.com |
|---|---|
| State | Accepted, archived |
| Delegated to: | David Miller |
| Headers | show |
diff --git a/drivers/net/ethernet/sfc/efx.c b/drivers/net/ethernet/sfc/efx.c index 3cbfbff..4a00053 100644 --- a/drivers/net/ethernet/sfc/efx.c +++ b/drivers/net/ethernet/sfc/efx.c @@ -1349,7 +1349,7 @@ static int efx_probe_interrupts(struct efx_nic *efx) } /* RSS might be usable on VFs even if it is disabled on the PF */ - efx->rss_spread = (efx->n_rx_channels > 1 ? + efx->rss_spread = ((efx->n_rx_channels > 1 || !efx_sriov_wanted(efx)) ? efx->n_rx_channels : efx_vf_size(efx)); return 0;
If RSS is disabled on the PF (efx->n_rx_channels == 1) we try to set up the indirection table so that VFs can use it, setting efx->rss_spread = efx_vf_size(efx). But if SR-IOV was disabled at compile time, this evaluates to 0 and we end up dividing by zero when initialising the table. I considered changing the fallback definition of efx_vf_size() to return 1, but its value is really meaningless if we are not going to enable VFs. Therefore add a condition of efx_sriov_wanted(efx) in efx_probe_interrupts(). Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> --- drivers/net/ethernet/sfc/efx.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)