Unverified Commit 93fd2be6 authored by Yang Yingliang's avatar Yang Yingliang Committed by Mark Brown
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ASoC: SOF: ipc3-dtrace: Switch to memdup_user_nul() helper 



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

Signed-off-by: default avatarYang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20230725120247.509422-1-yangyingliang@huawei.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent f957172b

sound/soc/sof/ipc3-dtrace.c

+3 −9
Original line number Diff line number Diff line
@@ -196,15 +196,9 @@ static ssize_t dfsentry_trace_filter_write(struct file *file, const char __user 
		return -EINVAL;

	}



	string = kmalloc(count + 1, GFP_KERNEL);

	if (!string)

		return -ENOMEM;



	if (copy_from_user(string, from, count)) {

		ret = -EFAULT;

		goto error;

	}

	string[count] = '\0';

	string = memdup_user_nul(from, count);

	if (IS_ERR(string))

		return PTR_ERR(string);



	ret = trace_filter_parse(sdev, string, &num_elems, &elems);

	if (ret < 0)