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serial: mvebu-uart: Fix to avoid a potential NULL pointer dereference
of_match_device on failure to find a matching device can return a NULL pointer. The patch checks for such a scenrio and passes the error upstream. Signed-off-by: Aditya Pakki <pakki001@umn.edu> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -810,6 +810,9 @@ static int mvebu_uart_probe(struct platform_device *pdev)
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return -EINVAL;
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}
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if (!match)
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return -ENODEV;
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/* Assume that all UART ports have a DT alias or none has */
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id = of_alias_get_id(pdev->dev.of_node, "serial");
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if (!pdev->dev.of_node || id < 0)
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