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serial: 8250_dw: Disable clock on error

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[ Upstream commit 8af016aa5a ]

If there is no clock rate for uartclk defined, disable the previously
enabled clock again.

Found by Linux Driver Verification project (linuxtesting.org).

Fixes: 23f5b3fdd0 serial: 8250_dw: only get the clock rate in one place
Signed-off-by: Stefan Potyra <Stefan.Potyra@elektrobit.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Stefan Potyra
2017-12-06 16:46:12 +01:00
committed by Greg Kroah-Hartman
parent f1be266203
commit 79c3f5cf46
1 changed files with 2 additions and 1 deletions
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3
drivers/tty/serial/8250/8250_dw.c
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@@ -513,7 +513,8 @@ static int dw8250_probe(struct platform_device *pdev)
/* If no clock rate is defined, fail. */
if (!p->uartclk) {
dev_err(dev, "clock rate not defined\n");
return -EINVAL;
err = -EINVAL;
goto err_clk;
}
data->pclk = devm_clk_get(dev, "apb_pclk");