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mmc: sdhci-iproc: handle mmc_of_parse() errors during probe

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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>
This commit is contained in:
Stefan Wahren 2018-12-23 21:59:17 +01:00 committed by Greg Kroah-Hartman
parent 86a395c27a
commit 3027ecc100
1 changed files with 4 additions and 1 deletions
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5
drivers/mmc/host/sdhci-iproc.c
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@ -217,7 +217,10 @@ static int sdhci_iproc_probe(struct platform_device *pdev)
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);
/* Enable EMMC 1/8V DDR capable */