[PATCH] gpio: dwapb: fix a signedness bug handling IRQs

[Dan Carpenter]

Smatch flags a couple bugs here:

drivers/gpio/gpio-dwapb.c:447 dwapb_configure_irqs() warn: always true 
condition '(pp->irq[i] >= 0) => (0-u32max >= 0)'
drivers/gpio/gpio-dwapb.c:627 dwapb_gpio_get_pdata() warn: always true 
condition '(pp->irq[j] >= 0) => (0-u32max >= 0)'

The problem is that we're storing error codes in pp->irq[] so it needs
to be signed for the error handling to work correctly.

Fixes: da069d5d2b81 ("gpio: dwapb: Rework support for 1 interrupt per port A 
GPIO")
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>

diff --git a/include/linux/platform_data/gpio-dwapb.h 
b/include/linux/platform_data/gpio-dwapb.h
index 5a52d69c13f3..419cfacb4b42 100644
--- a/include/linux/platform_data/gpio-dwapb.h
+++ b/include/linux/platform_data/gpio-dwapb.h
@@ -19,7 +19,7 @@ struct dwapb_port_property {
        unsigned int    idx;
        unsigned int    ngpio;
        unsigned int    gpio_base;
-       unsigned int    irq[32];
+       int             irq[32];
        bool            has_irq;
        bool            irq_shared;
 };