From: Greg Kroah-Hartman gregkh@linuxfoundation.org
[ Upstream commit 3a96e97ab4e835078e6f27b7e1c0947814df3841 ]
The bar and offset parameters to setup_port() are used in pointer math, and while it would be very difficult to get them to wrap as a negative number, just be "safe" and make them unsigned so that static checkers do not trip over them unintentionally.
Cc: Jiri Slaby jirislaby@kernel.org Reported-by: Jordy Zomer jordy@pwning.systems Link: https://lore.kernel.org/r/20210726130717.2052096-1-gregkh@linuxfoundation.or... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/tty/serial/8250/8250_pci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c index 39f9ea24e316..58f718ed1bb9 100644 --- a/drivers/tty/serial/8250/8250_pci.c +++ b/drivers/tty/serial/8250/8250_pci.c @@ -87,7 +87,7 @@ static void moan_device(const char *str, struct pci_dev *dev)
static int setup_port(struct serial_private *priv, struct uart_8250_port *port, - int bar, int offset, int regshift) + u8 bar, unsigned int offset, int regshift) { struct pci_dev *dev = priv->dev;