linux-kernel - [PATCH] drm/amdgpu: Fix signedness bug in sdma_v4_0_process_trap

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Message-ID: <afb229a9-3f18-44cb-b305-5fbb2e1b4ee3@moroto.mountain>
Date: Sun, 28 Apr 2024 15:57:00 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: Bob Zhou <bob.zhou@....com>
Cc: 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>,
	Guchun Chen <guchun.chen@....com>, Le Ma <le.ma@....com>,
	Lijo Lazar <lijo.lazar@....com>,
	Shashank Sharma <shashank.sharma@....com>,
	amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.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@...aro.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