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i2c: at91: Handle return value of clk_prepare_enable

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clk_prepare_enable() can fail here and we must check its return value.
Also, add a missing clk_disable_unprepare().

Signed-off-by: Arvind Yadav <[email protected]>
Acked-by: Ludovic Desroches <[email protected]>
Signed-off-by: Wolfram Sang <[email protected]>
This commit is contained in:
Arvind Yadav 2017-05-31 12:27:44 +05:30 • committed by Wolfram Sang
commit 56a6cb8865
1 changed files with 6 additions and 2 deletions
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8
drivers/i2c/busses/i2c-at91.c
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@ -1083,12 +1083,16 @@ static int at91_twi_probe(struct platform_device *pdev)
dev_err(dev->dev, "no clock defined\n");
return -ENODEV;
}
clk_prepare_enable(dev->clk);
rc = clk_prepare_enable(dev->clk);
if (rc)
return rc;
if (dev->dev->of_node) {
rc = at91_twi_configure_dma(dev, phy_addr);
if (rc == -EPROBE_DEFER)
if (rc == -EPROBE_DEFER) {
clk_disable_unprepare(dev->clk);
return rc;
}
}
if (!of_property_read_u32(pdev->dev.of_node, "atmel,fifo-size",