X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Farch%2Fblackfin%2Finclude%2Fasm%2Fuaccess.h;fp=kernel%2Farch%2Fblackfin%2Finclude%2Fasm%2Fuaccess.h;h=8cd0184ea9efbd517f97d8b0fcd90659ee66c0fe;hb=52f993b8e89487ec9ee15a7fb4979e0f09a45b27;hp=90612a7f2cf32f0872af2651b608cd56eb0fff26;hpb=c189ccac5702322ed843fe17057035b7222a59b6;p=kvmfornfv.git

diff --git a/kernel/arch/blackfin/include/asm/uaccess.h b/kernel/arch/blackfin/include/asm/uaccess.h
index 90612a7f2..8cd0184ea 100644
--- a/kernel/arch/blackfin/include/asm/uaccess.h
+++ b/kernel/arch/blackfin/include/asm/uaccess.h
@@ -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