Am 20.05.20 um 17:31 schrieb Ruhl, Michael J:
-----Original Message----- From: Dan Carpenter <dan.carpenter@xxxxxxxxxx> Sent: Wednesday, May 20, 2020 11:26 AM To: Alex Deucher <alexander.deucher@xxxxxxx>; Kevin Wang <kevin1.wang@xxxxxxx>; Ruhl, Michael J <michael.j.ruhl@xxxxxxxxx> Cc: Christian König <christian.koenig@xxxxxxx>; David Airlie <airlied@xxxxxxxx>; Daniel Vetter <daniel@xxxxxxxx>; Evan Quan <evan.quan@xxxxxxx>; Rui Huang <ray.huang@xxxxxxx>; Kenneth Feng <kenneth.feng@xxxxxxx>; Yintian Tao <yttao@xxxxxxx>; Hawking Zhang <Hawking.Zhang@xxxxxxx>; amd-gfx@xxxxxxxxxxxxxxxxxxxxx; dri- devel@xxxxxxxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; kernel- janitors@xxxxxxxxxxxxxxx Subject: [PATCH v3] drm/amdgpu: off by one in amdgpu_device_attr_create_groups() error handling This loop in the error handling code should start a "i - 1" and end at "i == 0". Currently it starts a "i" and ends at "i == 1". The result is that it removes one attribute that wasn't created yet, and leaks the zeroeth attribute. Fixes: 4e01847c38f7 ("drm/amdgpu: optimize amdgpu device attribute code") Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> --- v2: style change v3: Fix embarrassing typo in the subject😊 Acked-by: Michael J. Ruhl <michael.j.ruhl@xxxxxxxxx>
Reviewed-by: Christian König <christian.koenig@xxxxxxx>
mdrivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | 3 +-- 1 files changed, 1 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c index b75362bf0742..e809534fabd4 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c @@ -1942,9 +1942,8 @@ static int amdgpu_device_attr_create_groups(struct amdgpu_device *adev, return 0; failed: - for (; i > 0; i--) { + while (i--) amdgpu_device_attr_remove(adev, &attrs[i]); - } return ret; }
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