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    Subject[PATCH 4.19 119/149] qed: Consider TX tcs while deriving the max num_queues for PF.
    Date
    4.19-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    [ Upstream commit fb1faab74ddef9ec2d841d54e5d0912a097b3abe ]

    Max supported queues is derived incorrectly in the case of multi-CoS.
    Need to consider TCs while calculating num_queues for PF.

    Signed-off-by: Sudarsana Reddy Kalluru <skalluru@marvell.com>
    Signed-off-by: Ariel Elior <aelior@marvell.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/net/ethernet/qlogic/qed/qed_l2.c | 5 +++--
    1 file changed, 3 insertions(+), 2 deletions(-)

    diff --git a/drivers/net/ethernet/qlogic/qed/qed_l2.c b/drivers/net/ethernet/qlogic/qed/qed_l2.c
    index e68ca83ae915..64ac95ca4df2 100644
    --- a/drivers/net/ethernet/qlogic/qed/qed_l2.c
    +++ b/drivers/net/ethernet/qlogic/qed/qed_l2.c
    @@ -2216,7 +2216,7 @@ static int qed_fill_eth_dev_info(struct qed_dev *cdev,
    u16 num_queues = 0;

    /* Since the feature controls only queue-zones,
    - * make sure we have the contexts [rx, tx, xdp] to
    + * make sure we have the contexts [rx, xdp, tcs] to
    * match.
    */
    for_each_hwfn(cdev, i) {
    @@ -2226,7 +2226,8 @@ static int qed_fill_eth_dev_info(struct qed_dev *cdev,
    u16 cids;

    cids = hwfn->pf_params.eth_pf_params.num_cons;
    - num_queues += min_t(u16, l2_queues, cids / 3);
    + cids /= (2 + info->num_tc);
    + num_queues += min_t(u16, l2_queues, cids);
    }

    /* queues might theoretically be >256, but interrupts'
    --
    2.19.1


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