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Commit a50521b0 authored by Stefan Potyra's avatar Stefan Potyra Committed by Greg Kroah-Hartman
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serial: 8250_dw: Disable clock on error 




[ Upstream commit 8af016aa5a27c6a2505460eb4d83f1e70c38dc43 ]

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

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

Fixes: 23f5b3fd serial: 8250_dw: only get the clock rate in one place
Signed-off-by: default avatarStefan Potyra <Stefan.Potyra@elektrobit.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarSasha Levin <alexander.levin@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 8ee96dfd

drivers/tty/serial/8250/8250_dw.c

+2 −1
Original line number Diff line number Diff line
@@ -464,7 +464,8 @@ 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");