RE: [PATCH] drm/amdgpu: Fix signedness bug in sdma_v4_0_process_trap_irq()

[Zhou, Bob]

[Public]

Reviewed-by: Bob Zhou <bob.zhou@xxxxxxx>

Regards,
Bob

-----Original Message-----
From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Sent: 2024年4月28日 20:57
To: Zhou, Bob <Bob.Zhou@xxxxxxx>
Cc: Deucher, Alexander <Alexander.Deucher@xxxxxxx>; Koenig, Christian <Christian.Koenig@xxxxxxx>; Pan, Xinhui <Xinhui.Pan@xxxxxxx>; David Airlie <airlied@xxxxxxxxx>; Daniel Vetter <daniel@xxxxxxxx>; Kuehling, Felix <Felix.Kuehling@xxxxxxx>; Zhang, Hawking <Hawking.Zhang@xxxxxxx>; Guchun Chen <guchunchen@xxxxxxx>; Ma, Le <Le.Ma@xxxxxxx>; Lazar, Lijo <Lijo.Lazar@xxxxxxx>; Sharma, Shashank <Shashank.Sharma@xxxxxxx>; amd-gfx@xxxxxxxxxxxxxxxxxxxxx; dri-devel@xxxxxxxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; kernel-janitors@xxxxxxxxxxxxxxx
Subject: [PATCH] drm/amdgpu: Fix signedness bug in sdma_v4_0_process_trap_irq()

The "instance" variable needs to be signed for the error handling to work.

Fixes: b34ddc71267a ("drm/amdgpu: add error handle to avoid out-of-bounds")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
 drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
index 101038395c3b..772604feb6ac 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
@@ -2017,7 +2017,7 @@ static int sdma_v4_0_process_trap_irq(struct amdgpu_device *adev,
                                      struct amdgpu_irq_src *source,
                                      struct amdgpu_iv_entry *entry)  {
-       uint32_t instance;
+       int instance;

        DRM_DEBUG("IH: SDMA trap\n");
        instance = sdma_v4_0_irq_id_to_seq(entry->client_id);
--
2.43.0