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| author | Geliang Tang <geliangtang@gmail.com> | 2017-05-06 23:40:17 +0800 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2017-05-08 09:28:39 +0200 |
| commit | 261aeba834f384cd9cf85be72078291d30fca4e4 (patch) | |
| tree | 1372e92d149b334a65a0c868f49912e5bf2ef5cf /drivers/gpu/drm/i915/intel_pipe_crc.c | |
| parent | 6f38123ecaac446312a63523b68df84ceb5a06ed (diff) | |
| download | linux-261aeba834f384cd9cf85be72078291d30fca4e4.tar.bz2 | |
drm/i915: use memdup_user_nul
Use memdup_user_nul() helper instead of open-coding to simplify the
code.
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/6baf3aa45d0b5e0fd016b508bac905ebf8443aac.1493779294.git.geliangtang@gmail.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_pipe_crc.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_pipe_crc.c | 13 |
1 files changed, 3 insertions, 10 deletions
diff --git a/drivers/gpu/drm/i915/intel_pipe_crc.c b/drivers/gpu/drm/i915/intel_pipe_crc.c index 647426c75b0a..8fbd2bd0877f 100644 --- a/drivers/gpu/drm/i915/intel_pipe_crc.c +++ b/drivers/gpu/drm/i915/intel_pipe_crc.c @@ -853,19 +853,12 @@ static ssize_t display_crc_ctl_write(struct file *file, const char __user *ubuf, return -E2BIG; } - tmpbuf = kmalloc(len + 1, GFP_KERNEL); - if (!tmpbuf) - return -ENOMEM; - - if (copy_from_user(tmpbuf, ubuf, len)) { - ret = -EFAULT; - goto out; - } - tmpbuf[len] = '\0'; + tmpbuf = memdup_user_nul(ubuf, len); + if (IS_ERR(tmpbuf)) + return PTR_ERR(tmpbuf); ret = display_crc_ctl_parse(dev_priv, tmpbuf, len); -out: kfree(tmpbuf); if (ret < 0) return ret; |