Commit d7a9ffa0 authored by Al Viro's avatar Al Viro Committed by Jiri Slaby

blackfin: fix copy_from_user()

commit 8f035983 upstream.
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: default avatarJiri Slaby <jslaby@suse.cz>
parent f78d413a
......@@ -177,11 +177,12 @@ static inline int bad_user_access_length(void)
static inline unsigned long __must_check
copy_from_user(void *to, const void __user *from, unsigned long n)
{
if (access_ok(VERIFY_READ, from, n))
if (likely(access_ok(VERIFY_READ, from, n))) {
memcpy(to, (const void __force *)from, n);
else
return n;
return 0;
}
memset(to, 0, n);
return n;
}
static inline unsigned long __must_check
......
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