[PATCH 34/45] drm/amd/display: Fix Coverity INTEGER_OVERFLOW within dal_gpio_service_create

[Tom Chung]

From: Hersen Wu <hersenxs...@amd.com>

[Why]
For subtraction, coverity reports integer overflow
warning message when variable type is uint32_t.

[How]
Change variable type to int32_t.

Reviewed-by: Harry Wentland <harry.wentl...@amd.com>
Acked-by: Tom Chung <chiahsuan.ch...@amd.com>
Signed-off-by: Hersen Wu <hersenxs...@amd.com>
---
 drivers/gpu/drm/amd/display/dc/gpio/gpio_service.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/gpio/gpio_service.c 
b/drivers/gpu/drm/amd/display/dc/gpio/gpio_service.c
index d19d5c177022..f344478e9bd4 100644
--- a/drivers/gpu/drm/amd/display/dc/gpio/gpio_service.c
+++ b/drivers/gpu/drm/amd/display/dc/gpio/gpio_service.c
@@ -56,7 +56,7 @@ struct gpio_service *dal_gpio_service_create(
        struct dc_context *ctx)
 {
        struct gpio_service *service;
-       uint32_t index_of_id;
+       int32_t index_of_id;
 
        service = kzalloc(sizeof(struct gpio_service), GFP_KERNEL);
 
@@ -112,7 +112,7 @@ struct gpio_service *dal_gpio_service_create(
        return service;
 
 failure_2:
-       while (index_of_id) {
+       while (index_of_id > 0) {
                --index_of_id;
                kfree(service->busyness[index_of_id]);
        }
-- 
2.34.1