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    Subject[PATCH 5.10 059/141] interconnect: qcom: icc-rpmh: Add BCMs to commit list in pre_aggregate
    Date
    From: Mike Tipton <mdtipton@codeaurora.org>

    commit b95b668eaaa2574e8ee72f143c52075e9955177e upstream.

    We're only adding BCMs to the commit list in aggregate(), but there are
    cases where pre_aggregate() is called without subsequently calling
    aggregate(). In particular, in icc_sync_state() when a node with initial
    BW has zero requests. Since BCMs aren't added to the commit list in
    these cases, we don't actually send the zero BW request to HW. So the
    resources remain on unnecessarily.

    Add BCMs to the commit list in pre_aggregate() instead, which is always
    called even when there are no requests.

    Signed-off-by: Mike Tipton <mdtipton@codeaurora.org>
    [georgi: remove icc_sync_state for platforms with incomplete support]
    Link: https://lore.kernel.org/r/20211125174751.25317-1-djakov@kernel.org
    Signed-off-by: Georgi Djakov <djakov@kernel.org>
    [dianders: dropped sm8350.c which isn't present in 5.10]
    Signed-off-by: Douglas Anderson <dianders@chromium.org>
    Acked-by: Alex Elder <elder@linaro.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    drivers/interconnect/qcom/icc-rpmh.c | 10 +++++-----
    drivers/interconnect/qcom/sm8150.c | 1 -
    drivers/interconnect/qcom/sm8250.c | 1 -
    3 files changed, 5 insertions(+), 7 deletions(-)

    --- a/drivers/interconnect/qcom/icc-rpmh.c
    +++ b/drivers/interconnect/qcom/icc-rpmh.c
    @@ -20,13 +20,18 @@ void qcom_icc_pre_aggregate(struct icc_n
    {
    size_t i;
    struct qcom_icc_node *qn;
    + struct qcom_icc_provider *qp;

    qn = node->data;
    + qp = to_qcom_provider(node->provider);

    for (i = 0; i < QCOM_ICC_NUM_BUCKETS; i++) {
    qn->sum_avg[i] = 0;
    qn->max_peak[i] = 0;
    }
    +
    + for (i = 0; i < qn->num_bcms; i++)
    + qcom_icc_bcm_voter_add(qp->voter, qn->bcms[i]);
    }
    EXPORT_SYMBOL_GPL(qcom_icc_pre_aggregate);

    @@ -44,10 +49,8 @@ int qcom_icc_aggregate(struct icc_node *
    {
    size_t i;
    struct qcom_icc_node *qn;
    - struct qcom_icc_provider *qp;

    qn = node->data;
    - qp = to_qcom_provider(node->provider);

    if (!tag)
    tag = QCOM_ICC_TAG_ALWAYS;
    @@ -67,9 +70,6 @@ int qcom_icc_aggregate(struct icc_node *
    *agg_avg += avg_bw;
    *agg_peak = max_t(u32, *agg_peak, peak_bw);

    - for (i = 0; i < qn->num_bcms; i++)
    - qcom_icc_bcm_voter_add(qp->voter, qn->bcms[i]);
    -
    return 0;
    }
    EXPORT_SYMBOL_GPL(qcom_icc_aggregate);
    --- a/drivers/interconnect/qcom/sm8150.c
    +++ b/drivers/interconnect/qcom/sm8150.c
    @@ -627,7 +627,6 @@ static struct platform_driver qnoc_drive
    .driver = {
    .name = "qnoc-sm8150",
    .of_match_table = qnoc_of_match,
    - .sync_state = icc_sync_state,
    },
    };
    module_platform_driver(qnoc_driver);
    --- a/drivers/interconnect/qcom/sm8250.c
    +++ b/drivers/interconnect/qcom/sm8250.c
    @@ -643,7 +643,6 @@ static struct platform_driver qnoc_drive
    .driver = {
    .name = "qnoc-sm8250",
    .of_match_table = qnoc_of_match,
    - .sync_state = icc_sync_state,
    },
    };
    module_platform_driver(qnoc_driver);

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