Commit 35d13c7a authored by Andy Shevchenko's avatar Andy Shevchenko

platform/x86: thinkpad_acpi: Use strndup_user() in dispatch_proc_write()

Simplify the user copy code by using strndup_user().
Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
parent be51bd45
......@@ -885,19 +885,11 @@ static ssize_t dispatch_proc_write(struct file *file,
if (!ibm || !ibm->write)
return -EINVAL;
if (count > PAGE_SIZE - 1)
return -EINVAL;
kernbuf = kmalloc(count + 1, GFP_KERNEL);
if (!kernbuf)
return -ENOMEM;
if (copy_from_user(kernbuf, userbuf, count)) {
kfree(kernbuf);
return -EFAULT;
}
kernbuf = strndup_user(userbuf, PAGE_SIZE);
if (IS_ERR(kernbuf))
return PTR_ERR(kernbuf);
kernbuf[count] = 0;
ret = ibm->write(kernbuf);
if (ret == 0)
ret = count;
......
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