From ac9b91f39d86f04eeacfccb6b6113b1ffa001ec1 Mon Sep 17 00:00:00 2001 From: Masahiro Yamada Date: Mon, 30 Nov 2015 18:53:35 +0900 Subject: [PATCH] i2c: uniphier_f: error out if clock rate is zero This input clock is used to generate the sampling clock for I2C bus. If the clock rate is zero, there is something wrong with the clock driver. Bail out with the appropriate error message in such a case. It would make it easier to find the root cause of failure. Signed-off-by: Masahiro Yamada Signed-off-by: Wolfram Sang --- drivers/i2c/busses/i2c-uniphier-f.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/i2c/busses/i2c-uniphier-f.c b/drivers/i2c/busses/i2c-uniphier-f.c index e8d03bcfe3e0..67109e1d66c3 100644 --- a/drivers/i2c/busses/i2c-uniphier-f.c +++ b/drivers/i2c/busses/i2c-uniphier-f.c @@ -481,6 +481,10 @@ static int uniphier_fi2c_clk_init(struct device *dev, return ret; clk_rate = clk_get_rate(priv->clk); + if (!clk_rate) { + dev_err(dev, "input clock rate should not be zero\n"); + return -EINVAL; + } uniphier_fi2c_reset(priv); @@ -531,7 +535,7 @@ static int uniphier_fi2c_probe(struct platform_device *pdev) ret = uniphier_fi2c_clk_init(dev, priv); if (ret) - return ret; + goto err; ret = devm_request_irq(dev, irq, uniphier_fi2c_interrupt, 0, pdev->name, priv); -- 2.39.5