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    Subject[PATCH 4.9 22/30] mmc: sdhci-iproc: handle mmc_of_parse() errors during probe
    Date
    4.9-stable review patch.  If anyone has any objections, please let me know.

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

    From: Stefan Wahren <stefan.wahren@i2se.com>

    commit 2bd44dadd5bfb4135162322fd0b45a174d4ad5bf upstream.

    We need to handle mmc_of_parse() errors during probe.

    This finally fixes the wifi regression on Raspberry Pi 3 series.
    In error case the wifi chip was permanently in reset because of
    the power sequence depending on the deferred probe of the GPIO expander.

    Fixes: b580c52d58d9 ("mmc: sdhci-iproc: add IPROC SDHCI driver")
    Cc: stable@vger.kernel.org
    Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
    Acked-by: Adrian Hunter <adrian.hunter@intel.com>
    Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>


    ---
    drivers/mmc/host/sdhci-iproc.c | 5 ++++-
    1 file changed, 4 insertions(+), 1 deletion(-)

    --- a/drivers/mmc/host/sdhci-iproc.c
    +++ b/drivers/mmc/host/sdhci-iproc.c
    @@ -242,7 +242,10 @@ static int sdhci_iproc_probe(struct plat

    iproc_host->data = iproc_data;

    - mmc_of_parse(host->mmc);
    + ret = mmc_of_parse(host->mmc);
    + if (ret)
    + goto err;
    +
    sdhci_get_of_property(pdev);

    host->mmc->caps |= iproc_host->data->mmc_caps;

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