gpiolib: change gpio pin from unsigned to signed in acpi callback
authorQipeng Zha <qipeng.zha@intel.com>
Thu, 9 Apr 2015 22:25:10 +0000 (06:25 +0800)
committerLinus Walleij <linus.walleij@linaro.org>
Mon, 27 Apr 2015 13:20:33 +0000 (15:20 +0200)
The signed error will be wrongly used as valid gpio offset

Reported-by: David Binderman <dcb314@hotmail.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Qipeng Zha <qipeng.zha@intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
drivers/gpio/gpiolib-acpi.c

index d2303d50f56141c527c9d8b82c956c6c8169e239..725d16138b740e27a39d151ec5f7bfdedb9a969b 100644 (file)
@@ -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;