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.
A manual backport of the original patch was needed because
sdhci_get_of_property() was replaced by sdhci_get_property() upstream.
Fixes: b580c52d58d9 ("mmc: sdhci-iproc: add IPROC SDHCI driver")
Cc: stable@xxxxxxxxxxxxxxx # 4.14 and 4.19
Signed-off-by: Stefan Wahren <stefan.wahren@xxxxxxxx>
Acked-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
---
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 d0e83db..94eeed2 100644
--- a/drivers/mmc/host/sdhci-iproc.c
+++ b/drivers/mmc/host/sdhci-iproc.c
@@ -279,7 +279,10 @@ 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);
host->mmc->caps |= iproc_host->data->mmc_caps;
--
2.7.4
