drm/radeon: fix unsigned comparison with 0

Fixes warning because pipe is unsigned long and can never be negtative

vers/gpu/drm/radeon/radeon_kms.c:831:11: warning:
comparison of unsigned expression < 0 is always false [-Wtype-limits]
  if (pipe < 0 || pipe >= rdev->num_crtc) {
drivers/gpu/drm/radeon/radeon_kms.c:857:11: warning:
comparison of unsigned expression < 0 is always false [-Wtype-limits]
  if (pipe < 0 || pipe >= rdev->num_crtc) {

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: ChenTao <chentao107@huawei.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c
index 58176db..95006cb 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_kms.c
@@ -828,7 +828,7 @@ int radeon_enable_vblank_kms(struct drm_crtc *crtc)
        unsigned long irqflags;
        int r;
 
-       if (pipe < 0 || pipe >= rdev->num_crtc) {
+       if (pipe >= rdev->num_crtc) {
                DRM_ERROR("Invalid crtc %d\n", pipe);
                return -EINVAL;
        }
@@ -854,7 +854,7 @@ void radeon_disable_vblank_kms(struct drm_crtc *crtc)
        struct radeon_device *rdev = dev->dev_private;
        unsigned long irqflags;
 
-       if (pipe < 0 || pipe >= rdev->num_crtc) {
+       if (pipe >= rdev->num_crtc) {
                DRM_ERROR("Invalid crtc %d\n", pipe);
                return;
        }