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

[Zhou, Bob]

[Public]

Reviewed-by: Bob Zhou <bob.zhou at amd.com>

Regards,
Bob

-----Original Message-----
From: Dan Carpenter <dan.carpenter at linaro.org>
Sent: 2024年4月28日 20:57
To: Zhou, Bob <Bob.Zhou at amd.com>
Cc: Deucher, Alexander <Alexander.Deucher at amd.com>; Koenig, Christian <Christian.Koenig at amd.com>; Pan, Xinhui <Xinhui.Pan at amd.com>; David Airlie <airlied at gmail.com>; Daniel Vetter <daniel at ffwll.ch>; Kuehling, Felix <Felix.Kuehling at amd.com>; Zhang, Hawking <Hawking.Zhang at amd.com>; Guchun Chen <guchun.chen at amd.com>; Ma, Le <Le.Ma at amd.com>; Lazar, Lijo <Lijo.Lazar at amd.com>; Sharma, Shashank <Shashank.Sharma at amd.com>; amd-gfx at lists.freedesktop.org; dri-devel at lists.freedesktop.org; linux-kernel at vger.kernel.org; kernel-janitors at vger.kernel.org
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 at linaro.org>
---
 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