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serial8250-em: clk_get() IS_ERR() error handling fix

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Update the 8250_em driver to correctly handle the case
where no clock is associated with the device.

The return value of clk_get() needs to be checked with
IS_ERR() to avoid NULL pointer referencing.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Magnus Damm 2012-05-09 15:49:57 +09:00 committed by Greg Kroah-Hartman
parent 642180871b
commit 94e792ab66
1 changed files with 2 additions and 1 deletions
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3
drivers/tty/serial/8250/8250_em.c
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@ -110,8 +110,9 @@ static int __devinit serial8250_em_probe(struct platform_device *pdev)
}
priv->sclk = clk_get(&pdev->dev, "sclk");
if (!priv->sclk) {
if (IS_ERR(priv->sclk)) {
dev_err(&pdev->dev, "unable to get clock\n");
ret = PTR_ERR(priv->sclk);
goto err1;
}