From 894b867ac9dc6906022c27ace2339418db666002 Mon Sep 17 00:00:00 2001 From: Pavel Machek Date: Sat, 6 Jun 2020 17:11:46 +0200 Subject: [PATCH] 8250-men-mcb: fix signed/unsigned confusion 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) Link: https://lore.kernel.org/r/20200606151146.GA10940@amd Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_men_mcb.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/tty/serial/8250/8250_men_mcb.c b/drivers/tty/serial/8250/8250_men_mcb.c index e985f344b2dd..737c4c31e8a0 100644 --- a/drivers/tty/serial/8250/8250_men_mcb.c +++ b/drivers/tty/serial/8250/8250_men_mcb.c @@ -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; }