[PATCH v2 2/2] drm/rockchip: fix error check when getting irq

[Heiko Stübner]

platform_get_irq() can return negative error values and we already test for
these. Therefore the variable holding this value should be signed to not
loose possible error values.

Reported-by: David Binderman <dcb314 at hotmail.com>
Signed-off-by: Heiko Stuebner <heiko at sntech.de>
Reviewed-By: Daniel Kurtz <djkurtz at chromium.org>
---
changed since v1:
- instead of making irq in struct vop signed use a
  separate local irq int in vop_bind as suggested by Daniel Kurtz

 drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c 
b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index ccb0ce0..0e539d8 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -1409,7 +1409,7 @@ static int vop_bind(struct device *dev, struct device 
*master, void *data)
        struct vop *vop;
        struct resource *res;
        size_t alloc_size;
-       int ret;
+       int ret, irq;

        of_id = of_match_device(vop_driver_dt_match, dev);
        vop_data = of_id->data;
@@ -1445,11 +1445,12 @@ static int vop_bind(struct device *dev, struct device 
*master, void *data)
                return ret;
        }

-       vop->irq = platform_get_irq(pdev, 0);
-       if (vop->irq < 0) {
+       irq = platform_get_irq(pdev, 0);
+       if (irq < 0) {
                dev_err(dev, "cannot find irq for vop\n");
-               return vop->irq;
+               return irq;
        }
+       vop->irq = (unsigned int)irq;

        spin_lock_init(&vop->reg_lock);
        spin_lock_init(&vop->irq_lock);
-- 
2.1.4