linux-kernel - [PATCH next] drm/amdgpu: Fix unsigned comparison with zero in gmc_v9_0_process

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Message-Id: <20230522073017.1782984-1-harshit.m.mogalapalli@oracle.com>
Date:   Mon, 22 May 2023 00:30:15 -0700
From:   Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
To:     Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        "Pan, Xinhui" <Xinhui.Pan@....com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Felix Kuehling <Felix.Kuehling@....com>,
        Hawking Zhang <Hawking.Zhang@....com>, Le Ma <le.ma@....com>,
        Lijo Lazar <lijo.lazar@....com>,
        Mukul Joshi <mukul.joshi@....com>,
        Rajneesh Bhardwaj <rajneesh.bhardwaj@....com>,
        Graham Sider <Graham.Sider@....com>,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Cc:     harshit.m.mogalapalli@...cle.com, error27@...il.com,
        dan.carpenter@...aro.org, kernel-janitors@...r.kernel.org
Subject: [PATCH next] drm/amdgpu: Fix unsigned comparison with zero in gmc_v9_0_process_interrupt()

Smatch warns:
	drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c:579:
	unsigned 'xcc_id' is never less than zero.

gfx_v9_4_3_ih_to_xcc_inst() returns negative numbers as well.
Fix this by changing type of xcc_id to int.

Fixes: faf96b9b602d ("drm/amdgpu: correct the vmhub index when page fault occurs")
Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
---
This is from static analysis, only compile tested.
---
 drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index f70e666cecf2..1e8b2aaa48c1 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -557,8 +557,8 @@ static int gmc_v9_0_process_interrupt(struct amdgpu_device *adev,
 	const char *hub_name;
 	u64 addr;
 	uint32_t cam_index = 0;
-	int ret;
-	uint32_t node_id, xcc_id = 0;
+	int ret, xcc_id = 0;
+	uint32_t node_id;
 
 	node_id = entry->node_id;
 
-- 
2.38.1