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openrisc: fix the fix of copy_from_user() 

Since commit acb2505d01 ("openrisc: fix copy_from_user()"),
copy_from_user() returns the number of bytes requested, not the
number of bytes not copied.

Cc: Al Viro <viro@zeniv.linux.org.uk>
Fixes: acb2505d01 ("openrisc: fix copy_from_user()")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
hifive-unleashed-5.1
Guenter Roeck 2016-09-17 12:57:24 -07:00
parent 65c0044ca8
commit 8e4b72054f
1 changed files with 1 additions and 1 deletions
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2
arch/openrisc/include/asm/uaccess.h
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@ -276,7 +276,7 @@ copy_from_user(void *to, const void *from, unsigned long n)
unsigned long res = n;
if (likely(access_ok(VERIFY_READ, from, n)))
n = __copy_tofrom_user(to, from, n);
res = __copy_tofrom_user(to, from, n);
if (unlikely(res))
memset(to + (n - res), 0, res);
return res;