diff options
| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2014-11-12 10:28:33 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-11-25 17:06:38 -0800 |
| commit | 54178fe6b3443249ec2dcd6eec9f2c3ebcdc3142 (patch) | |
| tree | ee6e61dcf95c3f8eac6edb1c01e380bdb1d9b5db | |
| parent | 6b1f40cf4840820051d69646af0b6503878cb1bc (diff) | |
tty: serial: 8250: omap: line is unsigned, don't check < 0
Dan Carpenter reported:
|drivers/tty/serial/8250/8250_omap.c:1025 omap8250_probe()
|warn: unsigned 'up.port.line' is never less than zero.
|1025 if (up.port.line < 0) {
I (wrongly) assumed that line is an int and compiler didn't complain nor
did sparse. Since of_alias_get_id() and pdev->id can get negative I
check for the error via ret variable.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/tty/serial/8250/8250_omap.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/drivers/tty/serial/8250/8250_omap.c b/drivers/tty/serial/8250/8250_omap.c index 57a8b1241b85..336602eb453e 100644 --- a/drivers/tty/serial/8250/8250_omap.c +++ b/drivers/tty/serial/8250/8250_omap.c @@ -1014,19 +1014,20 @@ static int omap8250_probe(struct platform_device *pdev) up.port.unthrottle = omap_8250_unthrottle; if (pdev->dev.of_node) { - up.port.line = of_alias_get_id(pdev->dev.of_node, "serial"); + ret = of_alias_get_id(pdev->dev.of_node, "serial"); + of_property_read_u32(pdev->dev.of_node, "clock-frequency", &up.port.uartclk); priv->wakeirq = irq_of_parse_and_map(pdev->dev.of_node, 1); } else { - up.port.line = pdev->id; + ret = pdev->id; } - - if (up.port.line < 0) { - dev_err(&pdev->dev, "failed to get alias/pdev id, errno %d\n", - up.port.line); - return -ENODEV; + if (ret < 0) { + dev_err(&pdev->dev, "failed to get alias/pdev id\n"); + return ret; } + up.port.line = ret; + if (!up.port.uartclk) { up.port.uartclk = DEFAULT_CLK_SPEED; dev_warn(&pdev->dev, |