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8250-men-mcb: fix signed/unsigned confusion

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get_num_ports returns -ENODEV, and the result is stored in int, so it
should not be unsigned. Zero ports does not seem to make sense, so
make that check consistent.

Signed-off-by: Pavel Machek (CIP) <pavel@denx.de>

Link: https://lore.kernel.org/r/20200606151146.GA10940@amd
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Pavel Machek 2020-06-06 17:11:46 +02:00 committed by Greg Kroah-Hartman
parent 167cbce274
commit 894b867ac9
1 changed files with 2 additions and 2 deletions
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4
drivers/tty/serial/8250/8250_men_mcb.c
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@ -51,7 +51,7 @@ static u32 men_lookup_uartclk(struct mcb_device *mdev)
return clkval;
}
static unsigned int get_num_ports(struct mcb_device *mdev,
static int get_num_ports(struct mcb_device *mdev,
void __iomem *membase)
{
switch (mdev->id) {
@ -140,7 +140,7 @@ static void serial_8250_men_mcb_remove(struct mcb_device *mdev)
return;
num_ports = get_num_ports(mdev, data[0].uart.port.membase);
if (num_ports < 0 || num_ports > 4) {
if (num_ports <= 0 || num_ports > 4) {
dev_err(&mdev->dev, "error retrieving number of ports!\n");
return;
}