[PATCH] drm/amdgpu: avoid out of bounds access on array interrupt_status_offsets

[Colin King]

From: Colin Ian King <colin.king at canonical.com>

The check for an out of bound index into array interrupt_status_offsets
is off-by-one. Fix this and also don't compared to a hard coded array
size but use ARRAY_SIZE instead.

Signed-off-by: Colin Ian King <colin.king at canonical.com>
---
 drivers/gpu/drm/amd/amdgpu/dce_v6_0.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
index d3512f3..4ce4c1a 100644
--- a/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
@@ -2782,7 +2782,7 @@ static int dce_v6_0_hpd_irq(struct amdgpu_device *adev,
 	uint32_t disp_int, mask, int_control, tmp;
 	unsigned hpd;
 
-	if (entry->src_data > 6) {
+	if (entry->src_data >= ARRAY_SIZE(interrupt_status_offsets)) {
 		DRM_DEBUG("Unhandled interrupt: %d %d\n", entry->src_id, entry->src_data);
 		return 0;
 	}
-- 
2.9.3