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| author | Mirsad Todorovac <mtodorovac69@gmail.com> | 2024-12-17 23:58:10 +0100 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2024-12-18 12:39:08 -0500 |
| commit | a21ab06b8c2d8d25c4a83bdf39542834b1f3beae (patch) | |
| tree | 64bc12279eb2aeee83e04611960514b7049e405c /drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c | |
| parent | b64f2f3e870d324703246757cb67cec09a64a1c9 (diff) | |
| download | lwn-a21ab06b8c2d8d25c4a83bdf39542834b1f3beae.tar.gz lwn-a21ab06b8c2d8d25c4a83bdf39542834b1f3beae.zip | |
drm/admgpu: replace kmalloc() and memcpy() with kmemdup()
The static analyser tool gave the following advice:
./drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c:1266:7-14: WARNING opportunity for kmemdup
→ 1266 tmp = kmalloc(used_size, GFP_KERNEL);
1267 if (!tmp)
1268 return -ENOMEM;
1269
→ 1270 memcpy(tmp, &host_telemetry->body.error_count, used_size);
Replacing kmalloc() + memcpy() with kmemdump() doesn't change semantics.
Original code works without fault, so this is not a bug fix but proposed improvement.
Link: https://lwn.net/Articles/198928/
Fixes: 84a2947ecc85 ("drm/amdgpu: Implement virt req_ras_err_count")
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: Xinhui Pan <Xinhui.Pan@amd.com>
Cc: David Airlie <airlied@gmail.com>
Cc: Simona Vetter <simona@ffwll.ch>
Cc: Zhigang Luo <Zhigang.Luo@amd.com>
Cc: Victor Skvortsov <victor.skvortsov@amd.com>
Cc: Hawking Zhang <Hawking.Zhang@amd.com>
Cc: Lijo Lazar <lijo.lazar@amd.com>
Cc: Yunxiang Li <Yunxiang.Li@amd.com>
Cc: Jack Xiao <Jack.Xiao@amd.com>
Cc: Vignesh Chander <Vignesh.Chander@amd.com>
Cc: Danijel Slivka <danijel.slivka@amd.com>
Cc: amd-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Mirsad Todorovac <mtodorovac69@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c index c704e9803e11..0af469ec6fcc 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c @@ -1263,12 +1263,10 @@ static int amdgpu_virt_cache_host_error_counts(struct amdgpu_device *adev, if (used_size > (AMD_SRIOV_RAS_TELEMETRY_SIZE_KB << 10)) return 0; - tmp = kmalloc(used_size, GFP_KERNEL); + tmp = kmemdup(&host_telemetry->body.error_count, used_size, GFP_KERNEL); if (!tmp) return -ENOMEM; - memcpy(tmp, &host_telemetry->body.error_count, used_size); - if (checksum != amd_sriov_msg_checksum(tmp, used_size, 0, 0)) goto out; |