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serial: 8250_uniphier: fix error return code in uniphier_uart_probe() 

Fix to return a negative error code from the port register error
handling case instead of 0, as done elsewhere in this function.

Fixes: 39be40ce06 ("serial: 8250_uniphier: fix serial port index in private data")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Wei Yongjun 2018-01-04 07:42:15 +00:00 committed by Greg Kroah-Hartman
parent ea3d8465ab
commit 7defa77d2b
1 changed files with 3 additions and 2 deletions
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5
drivers/tty/serial/8250/8250_uniphier.c
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@ -250,12 +250,13 @@ static int uniphier_uart_probe(struct platform_device *pdev)
up.dl_read = uniphier_serial_dl_read;
up.dl_write = uniphier_serial_dl_write;
priv->line = serial8250_register_8250_port(&up);
if (priv->line < 0) {
ret = serial8250_register_8250_port(&up);
if (ret < 0) {
dev_err(dev, "failed to register 8250 port\n");
clk_disable_unprepare(priv->clk);
return ret;
}
priv->line = ret;
platform_set_drvdata(pdev, priv);