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Subject[PATCH v1] x86/mtrr: Convert to use strncpy_from_user() helper
Date
Replace the open coded string fetch from the user.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
arch/x86/kernel/cpu/mtrr/if.c | 12 ++----------
1 file changed, 2 insertions(+), 10 deletions(-)

diff --git a/arch/x86/kernel/cpu/mtrr/if.c b/arch/x86/kernel/cpu/mtrr/if.c
index e4adad68b5e5..3cbae60663fa 100644
--- a/arch/x86/kernel/cpu/mtrr/if.c
+++ b/arch/x86/kernel/cpu/mtrr/if.c
@@ -105,17 +105,9 @@ mtrr_write(struct file *file, const char __user *buf, size_t len, loff_t * ppos)

memset(line, 0, LINE_SIZE);

- length = len;
- length--;
-
- if (length > LINE_SIZE - 1)
- length = LINE_SIZE - 1;
-
+ length = strncpy_from_user(line, buf, LINE_SIZE - 1);
if (length < 0)
- return -EINVAL;
-
- if (copy_from_user(line, buf, length))
- return -EFAULT;
+ return length;

strim(line);

--
2.17.0
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