Another fix for issue affecting Raspberry Pi 3-series WiFi (rhbz 1652093)
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| From: Stefan Wahren <stefan.wahren@i2se.com> | ||||
| To: Al Cooper <alcooperx@gmail.com>, Adrian Hunter <adrian.hunter@intel.com>, | ||||
|  Ulf Hansson <ulf.hansson@linaro.org> | ||||
| Subject: [PATCH 1/2] mmc: sdhci-iproc: handle mmc_of_parse() errors during | ||||
|  probe | ||||
| Date: Sun, 23 Dec 2018 21:59:17 +0100 | ||||
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| 
 | ||||
| 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> | ||||
| ---
 | ||||
|  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; | ||||
| @ -593,6 +593,9 @@ Patch334: bcm2837-dts-add-Raspberry-Pi-3-A.patch | ||||
| # Fixes for bcm2835 mmc (sdcard) driver | ||||
| Patch335: bcm2835-mmc-Several-fixes-for-bcm2835-driver.patch | ||||
| 
 | ||||
| # https://patchwork.kernel.org/patch/10741809/ | ||||
| Patch336: bcm2835-mmc-sdhci-iproc-handle-mmc_of_parse-errors-during-probe.patch | ||||
| 
 | ||||
| # Patches enabling device specific brcm firmware nvram | ||||
| # https://www.spinics.net/lists/linux-wireless/msg178827.html | ||||
| Patch340: brcmfmac-Remove-firmware-loading-code-duplication.patch | ||||
| @ -1890,6 +1893,9 @@ fi | ||||
| # | ||||
| # | ||||
| %changelog | ||||
| * Mon Dec 24 2018 Peter Robinson <pbrobinson@fedoraproject.org> | ||||
| - Another fix for issue affecting Raspberry Pi 3-series WiFi (rhbz 1652093) | ||||
| 
 | ||||
| * Fri Dec 21 2018 Justin M. Forbes <jforbes@fedoraproject.org> - 4.20.0-0.rc7.git3.1 | ||||
| - Linux v4.20-rc7-214-g9097a058d49e | ||||
| 
 | ||||
|  | ||||
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