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From patchwork Sun Dec 23 20:59:17 2018
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for linux-arm-kernel@lists.infradead.org; Sun, 23 Dec 2018 21:00:25 +0000
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id 1MSZDt-1gz0AW3YfB-00SsKG; Sun, 23 Dec 2018 21:59:57 +0100
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From: Stefan Wahren <stefan.wahren@i2se.com>
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To: Al Cooper <alcooperx@gmail.com>, Adrian Hunter <adrian.hunter@intel.com>,
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Ulf Hansson <ulf.hansson@linaro.org>
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Subject: [PATCH 1/2] mmc: sdhci-iproc: handle mmc_of_parse() errors during
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probe
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Date: Sun, 23 Dec 2018 21:59:17 +0100
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Cc: Stefan Wahren <stefan.wahren@i2se.com>,
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Florian Fainelli <f.fainelli@gmail.com>,
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Scott Branden <sbranden@broadcom.com>,
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Ray Jui <rjui@broadcom.com>, linux-mmc@vger.kernel.org,
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stable@vger.kernel.org,
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Eric Anholt <eric@anholt.net>, bcm-kernel-feedback-list@broadcom.com,
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Gregory Fong <gregory.0xf0@gmail.com>,
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We need to handle mmc_of_parse() errors during probe.
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This finally fixes the wifi regression on Raspberry Pi 3 series.
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In error case the wifi chip was permanently in reset because of
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the power sequence depending on the deferred probe of the GPIO expander.
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Fixes: b580c52d58d9 ("mmc: sdhci-iproc: add IPROC SDHCI driver")
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Cc: stable@vger.kernel.org
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Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
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---
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drivers/mmc/host/sdhci-iproc.c | 5 ++++-
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1 file changed, 4 insertions(+), 1 deletion(-)
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diff --git a/drivers/mmc/host/sdhci-iproc.c b/drivers/mmc/host/sdhci-iproc.c
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index 0db9905..9d12c06 100644
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--- a/drivers/mmc/host/sdhci-iproc.c
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+++ b/drivers/mmc/host/sdhci-iproc.c
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@@ -296,7 +296,10 @@ static int sdhci_iproc_probe(struct platform_device *pdev)
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iproc_host->data = iproc_data;
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- mmc_of_parse(host->mmc);
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+ ret = mmc_of_parse(host->mmc);
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+ if (ret)
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+ goto err;
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+
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sdhci_get_property(pdev);
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host->mmc->caps |= iproc_host->data->mmc_caps;
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