linux-kernel - [PATCH] amd/amdgpu: use kmalloc_array to replace kmalloc with multiply

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Date:   Tue, 17 Nov 2020 18:55:01 -0800
From:   Bernard Zhao <bernard@...o.com>
To:     Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, Monk Liu <Monk.Liu@....com>,
        Hawking Zhang <Hawking.Zhang@....com>,
        Yintian Tao <yttao@....com>, Dennis Li <Dennis.Li@....com>,
        Wenhui Sheng <Wenhui.Sheng@....com>,
        chen gong <curry.gong@....com>,
        Bokun Zhang <Bokun.Zhang@....com>,
        "Stanley.Yang" <Stanley.Yang@....com>,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Cc:     opensource.kernel@...o.com, Bernard Zhao <bernard@...o.com>
Subject: [PATCH] amd/amdgpu: use kmalloc_array to replace kmalloc with multiply

Fix check_patch.pl warning:
WARNING: Prefer kmalloc_array over kmalloc with multiply
+bps = kmalloc(align_space * sizeof((*data)->bps), GFP_KERNEL);
WARNING: Prefer kmalloc_array over kmalloc with multiply
+bps_bo = kmalloc(align_space * sizeof((*data)->bps_bo),
GFP_KERNEL);
kmalloc_array has multiply overflow check, which will be safer.

Signed-off-by: Bernard Zhao <bernard@...o.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
index d0aea5e39531..f2a0851c804f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
@@ -280,8 +280,8 @@ static int amdgpu_virt_init_ras_err_handler_data(struct amdgpu_device *adev)
 	if (!*data)
 		return -ENOMEM;
 
-	bps = kmalloc(align_space * sizeof((*data)->bps), GFP_KERNEL);
-	bps_bo = kmalloc(align_space * sizeof((*data)->bps_bo), GFP_KERNEL);
+	bps = kmalloc_array(align_space, sizeof((*data)->bps), GFP_KERNEL);
+	bps_bo = kmalloc_array(align_space, sizeof((*data)->bps_bo), GFP_KERNEL);
 
 	if (!bps || !bps_bo) {
 		kfree(bps);
-- 
2.29.0