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net/bnx2x: fix MSIX vector and VF resource counts

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If MSIX is available, the vector count given by the table size is one
less than the actual count.  This count also limits the receive and
transmit queue resources the VF can support.

Fixes: 540a211084 ("bnx2x: driver core")

Signed-off-by: Charles (Chas) Williams <ciwillia@brocade.com>
Acked-by: Harish Patil <harish.patil@qlogic.com>
This commit is contained in:
Charles (Chas) Williams 2016-06-10 18:18:52 -04:00 committed by Bruce Richardson
parent 17a064531a
commit 3754101cd7
1 changed files with 5 additions and 3 deletions
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8
drivers/net/bnx2x/bnx2x.c
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@ -9552,8 +9552,10 @@ static int bnx2x_pci_get_caps(struct bnx2x_softc *sc)
static void bnx2x_init_rte(struct bnx2x_softc *sc)
{
if (IS_VF(sc)) {
sc->max_tx_queues = BNX2X_VF_MAX_QUEUES_PER_VF;
sc->max_rx_queues = BNX2X_VF_MAX_QUEUES_PER_VF;
sc->max_tx_queues = min(BNX2X_VF_MAX_QUEUES_PER_VF,
sc->igu_sb_cnt);
sc->max_rx_queues = min(BNX2X_VF_MAX_QUEUES_PER_VF,
sc->igu_sb_cnt);
} else {
sc->max_tx_queues = 128;
sc->max_rx_queues = 128;
@ -9695,7 +9697,7 @@ int bnx2x_attach(struct bnx2x_softc *sc)
pci_read(sc,
(sc->devinfo.pcie_msix_cap_reg + PCIR_MSIX_CTRL), &val,
2);
sc->igu_sb_cnt = (val & PCIM_MSIXCTRL_TABLE_SIZE);
sc->igu_sb_cnt = (val & PCIM_MSIXCTRL_TABLE_SIZE) + 1;
} else {
sc->igu_sb_cnt = 1;
}