[PATCH 3/6] mmc: sdhci-brcmstb: Fix driver to defer on clk_get defer

Al Cooper
2020-01-13T21:08:00Z

The new SCMI clock protocol driver does not get probed that early in
boot. Brcmstb drivers typically have the following code when getting
a clock:

priv->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(priv->clk)) {
dev_err(&pdev->dev, "Clock not found in Device Tree\n");
priv->clk = NULL;
}

This commit changes the driver to do what is below.

priv->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(priv->clk)) {
if (PTR_ERR(priv->clk) == -EPROBE_DEFER)
return -EPROBE_DEFER;
dev_err(&pdev->dev, "Clock not found in Device Tree\n");
priv->clk = NULL;
}

Signed-off-by: Al Cooper <alcooperx@gmail.com>
---
drivers/mmc/host/sdhci-brcmstb.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/mmc/host/sdhci-brcmstb.c b/drivers/mmc/host/sdhci-brcmstb.c
index daa89ca232a2..218176b79b6a 100644
--- a/drivers/mmc/host/sdhci-brcmstb.c
+++ b/drivers/mmc/host/sdhci-brcmstb.c
@@ -91,6 +91,8 @@ static int sdhci_brcmstb_probe(struct platform_device *pdev)

clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(clk)) {
+ if (PTR_ERR(clk) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
dev_err(&pdev->dev, "Clock not found in Device Tree\n");
clk = NULL;
}
--
2.17.1