gpiolib: change gpio pin from unsigned to signed in acpi callback

The signed error will be wrongly used as valid gpio offset

Reported-by: David Binderman <[email protected]>
Signed-off-by: Alan Cox <[email protected]>
Signed-off-by: Qipeng Zha <[email protected]>
Acked-by: Mika Westerberg <[email protected]>
Signed-off-by: Linus Walleij <[email protected]>

diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
index d2303d50f56141c527c9d8b82c956c6c8169e239..725d16138b740e27a39d151ec5f7bfdedb9a969b 100644 (file)
--- a/drivers/gpio/gpiolib-acpi.c
+++ b/drivers/gpio/gpiolib-acpi.c
@@ -550,7 +550,7 @@ acpi_gpio_adr_space_handler(u32 function, acpi_physical_address address,
 
        length = min(agpio->pin_table_length, (u16)(pin_index + bits));
        for (i = pin_index; i < length; ++i) {
-               unsigned pin = agpio->pin_table[i];
+               int pin = agpio->pin_table[i];
                struct acpi_gpio_connection *conn;
                struct gpio_desc *desc;
                bool found;