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blackfin: fix copy_from_user()

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commit 8f035983dd826d7e04f67b28acf8e2f08c347e41 upstream.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Willy Tarreau <w@1wt.eu>
This commit is contained in:
Al Viro
2016-09-09 19:16:58 -04:00
committed by Willy Tarreau
parent b5f6c58b90
commit 668a740df2
1 changed files with 5 additions and 4 deletions
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arch/blackfin/include/asm/uaccess.h
+5 -4
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@@ -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;
return 0;
}
memset(to, 0, n);
return n;
}
static inline unsigned long __must_check