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    Subject[PATCH 3.19.y-ckt 083/155] i2c: designware-platdrv: enable RuntimePM before registering to the core
    Date
    3.19.8-ckt10 -stable review patch.  If anyone has any objections, please let me know.

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

    From: Wolfram Sang <wsa+renesas@sang-engineering.com>

    commit 36d48fb5766aee9717e429f772046696b215282d upstream.

    The core may register clients attached to this master which may use
    funtionality from the master. So, RuntimePM must be enabled before, otherwise
    this will fail.

    Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
    Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
    Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
    [ kamal: backport to 3.19-stable: context ]
    Signed-off-by: Kamal Mostafa <kamal@canonical.com>
    ---
    drivers/i2c/busses/i2c-designware-platdrv.c | 11 ++++++-----
    1 file changed, 6 insertions(+), 5 deletions(-)

    diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c
    index 2b463c3..bd20110 100644
    --- a/drivers/i2c/busses/i2c-designware-platdrv.c
    +++ b/drivers/i2c/busses/i2c-designware-platdrv.c
    @@ -251,17 +251,18 @@ static int dw_i2c_probe(struct platform_device *pdev)
    adap->dev.parent = &pdev->dev;
    adap->dev.of_node = pdev->dev.of_node;

    + pm_runtime_set_autosuspend_delay(&pdev->dev, 1000);
    + pm_runtime_use_autosuspend(&pdev->dev);
    + pm_runtime_set_active(&pdev->dev);
    + pm_runtime_enable(&pdev->dev);
    +
    r = i2c_add_numbered_adapter(adap);
    if (r) {
    dev_err(&pdev->dev, "failure adding adapter\n");
    + pm_runtime_disable(&pdev->dev);
    return r;
    }

    - pm_runtime_set_autosuspend_delay(&pdev->dev, 1000);
    - pm_runtime_use_autosuspend(&pdev->dev);
    - pm_runtime_set_active(&pdev->dev);
    - pm_runtime_enable(&pdev->dev);
    -
    return 0;
    }

    --
    1.9.1


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