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serial: 8250_pci: make setup_port() parameters explicitly unsigned

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[ Upstream commit 3a96e97ab4 ]

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.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Greg Kroah-Hartman
2021-07-26 15:07:17 +02:00
parent 2603740df8
commit d0a8ef04c2
1 changed files with 1 additions and 1 deletions
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2
drivers/tty/serial/8250/8250_pci.c
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@@ -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;