On 23/12/18 10:59 PM, Stefan Wahren wrote:
> 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@xxxxxxxxxxxxxxx
> Signed-off-by: Stefan Wahren <stefan.wahren@xxxxxxxx>
Acked-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
> ---
> drivers/mmc/host/sdhci-iproc.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/host/sdhci-iproc.c b/drivers/mmc/host/sdhci-iproc.c
> index 0db9905..9d12c06 100644
> --- a/drivers/mmc/host/sdhci-iproc.c
> +++ b/drivers/mmc/host/sdhci-iproc.c
> @@ -296,7 +296,10 @@ 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_property(pdev);
>
> host->mmc->caps |= iproc_host->data->mmc_caps;
>
