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drm/tegra: Switch over to vmemdup_user()

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This patch fixes the following Coccinelle warning:

drivers/gpu/drm/tegra/submit.c:173: WARNING opportunity for vmemdup_user

Use vmemdup_user() rather than duplicating its implementation.
This is a little bit restricted to reduce false positives.

Signed-off-by: Qing Wang <wangqing@vivo.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Qing Wang
2021-10-18 04:31:26 -07:00
committed by Thierry Reding
parent 8935002fc3
commit bbdca2d41b
1 changed files with 3 additions and 8 deletions
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11
drivers/gpu/drm/tegra/submit.c
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@@ -169,14 +169,9 @@ static void *alloc_copy_user_array(void __user *from, size_t count, size_t size)
if (copy_len > 0x4000)
return ERR_PTR(-E2BIG);
data = kvmalloc(copy_len, GFP_KERNEL);
if (!data)
return ERR_PTR(-ENOMEM);
if (copy_from_user(data, from, copy_len)) {
kvfree(data);
return ERR_PTR(-EFAULT);
}
data = vmemdup_user(from, copy_len);
if (IS_ERR(data))
return ERR_CAST(data);
return data;
}