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drm/msm/adreno: adreno_gpu: Switch to memdup_user_nul() helper 

Use memdup_user_nul() helper instead of open-coding to simplify the code.

Signed-off-by: Ruan Jinjie <ruanjinjie@huawei.com>
Reviewed-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/552130/
Signed-off-by: Rob Clark <robdclark@chromium.org>
This commit is contained in:
Ruan Jinjie 2023-08-10 20:04:24 +08:00 committed by Rob Clark
parent 42854f8d2b
commit a895037e1e
1 changed files with 3 additions and 11 deletions
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14
drivers/gpu/drm/msm/adreno/adreno_gpu.c
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@ -397,17 +397,9 @@ int adreno_set_param(struct msm_gpu *gpu, struct msm_file_private *ctx,
case MSM_PARAM_CMDLINE: {
char *str, **paramp;
str = kmalloc(len + 1, GFP_KERNEL);
if (!str)
return -ENOMEM;
if (copy_from_user(str, u64_to_user_ptr(value), len)) {
kfree(str);
return -EFAULT;
}
/* Ensure string is null terminated: */
str[len] = '\0';
str = memdup_user_nul(u64_to_user_ptr(value), len);
if (IS_ERR(str))
return PTR_ERR(str);
mutex_lock(&gpu->lock);