From: Michael Chan michael.chan@broadcom.com
[ Upstream commit 1dbc59fa4bbaa108b641cd65a54f662b75e4ed36 ]
In an earlier commit to improve NQ reservations on 57500 chips, we set the resv_irqs on the 57500 VFs to the fixed value assigned by the PF regardless of how many are actually used. The current code assumes that resv_irqs minus the ones used by the network driver must be the ones for the RDMA driver. This is no longer true and we may return more MSIX vectors than requested, causing inconsistency. Fix it by capping the value.
Fixes: 01989c6b69d9 ("bnxt_en: Improve NQ reservations.") 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 --- drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c index bfa342a98d08..fc77caf0a076 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c @@ -157,8 +157,10 @@ static int bnxt_req_msix_vecs(struct bnxt_en_dev *edev, int ulp_id,
if (BNXT_NEW_RM(bp)) { struct bnxt_hw_resc *hw_resc = &bp->hw_resc; + int resv_msix;
- avail_msix = hw_resc->resv_irqs - bp->cp_nr_rings; + resv_msix = hw_resc->resv_irqs - bp->cp_nr_rings; + avail_msix = min_t(int, resv_msix, avail_msix); edev->ulp_tbl[ulp_id].msix_requested = avail_msix; } bnxt_fill_msix_vecs(bp, ent);