From d1d900f822b6b2874de9c1ef8094fc8df56a2f9f Mon Sep 17 00:00:00 2001
From: Guenter Roeck <linux@roeck-us.net>
Date: Mon, 6 Apr 2020 11:54:38 -0700
Subject: [PATCH] Bluetooth: Simplify / fix return values from tk_request
Git-commit: d1d900f822b6b2874de9c1ef8094fc8df56a2f9f
Patch-mainline: v5.8-rc1
References: jsc#SLE-13430
Some static checker run by 0day reports a variableScope warning.
net/bluetooth/smp.c:870:6: warning:
The scope of the variable 'err' can be reduced. [variableScope]
There is no need for two separate variables holding return values.
Stick with the existing variable. While at it, don't pre-initialize
'ret' because it is set in each code path.
tk_request() is supposed to return a negative error code on errors,
not a bluetooth return code. The calling code converts the return
value to SMP_UNSPECIFIED if needed.
Fixes: 92516cd97fd4 ("Bluetooth: Always request for user confirmation for Just Works")
Cc: Sonny Sasaka <sonnysasaka@chromium.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Sonny Sasaka <sonnysasaka@chromium.org>
Signed-off-by: Sonny Sasaka <sonnysasaka@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
net/bluetooth/smp.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c
index a85e3e49cd0d..daf198fb2b31 100644
--- a/net/bluetooth/smp.c
+++ b/net/bluetooth/smp.c
@@ -854,8 +854,7 @@ static int tk_request(struct l2cap_conn *conn, u8 remote_oob, u8 auth,
struct l2cap_chan *chan = conn->smp;
struct smp_chan *smp = chan->data;
u32 passkey = 0;
- int ret = 0;
- int err;
+ int ret;
/* Initialize key for JUST WORKS */
memset(smp->tk, 0, sizeof(smp->tk));
@@ -887,12 +886,12 @@ static int tk_request(struct l2cap_conn *conn, u8 remote_oob, u8 auth,
/* If Just Works, Continue with Zero TK and ask user-space for
* confirmation */
if (smp->method == JUST_WORKS) {
- err = mgmt_user_confirm_request(hcon->hdev, &hcon->dst,
+ ret = mgmt_user_confirm_request(hcon->hdev, &hcon->dst,
hcon->type,
hcon->dst_type,
passkey, 1);
- if (err)
- return SMP_UNSPECIFIED;
+ if (ret)
+ return ret;
set_bit(SMP_FLAG_WAIT_USER, &smp->flags);
return 0;
}
--
2.16.4