netdev - [PATCH net 3/6] s390/qeth: fix false reporting of VNIC CHAR config failure

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Date:   Mon, 23 Dec 2019 15:03:23 +0100
From:   Julian Wiedmann <jwi@...ux.ibm.com>
To:     David Miller <davem@...emloft.net>
Cc:     <netdev@...r.kernel.org>, <linux-s390@...r.kernel.org>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Stefan Raspl <raspl@...ux.ibm.com>,
        Ursula Braun <ubraun@...ux.ibm.com>,
        Alexandra Winter <wintera@...ux.ibm.com>,
        Julian Wiedmann <jwi@...ux.ibm.com>
Subject: [PATCH net 3/6] s390/qeth: fix false reporting of VNIC CHAR config failure

From: Alexandra Winter <wintera@...ux.ibm.com>

Symptom: Error message "Configuring the VNIC characteristics failed"
in dmesg whenever an OSA interface on z15 is set online.

The VNIC characteristics get re-programmed when setting a L2 device
online. This follows the selected 'wanted' characteristics - with the
exception that the INVISIBLE characteristic unconditionally gets
switched off.

For devices that don't support INVISIBLE (ie. OSA), the resulting
IO failure raises a noisy error message
("Configuring the VNIC characteristics failed").
For IQD, INVISIBLE is off by default anyways.

So don't unnecessarily special-case the INVISIBLE characteristic, and
thereby suppress the misleading error message on OSA devices.

Fixes: caa1f0b10d18 ("s390/qeth: add VNICC enable/disable support")
Signed-off-by: Alexandra Winter <wintera@...ux.ibm.com>
Reviewed-by: Julian Wiedmann <jwi@...ux.ibm.com>
Signed-off-by: Julian Wiedmann <jwi@...ux.ibm.com>
---
 drivers/s390/net/qeth_l2_main.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
index 15e2fd65d434..fc5d8ed3a737 100644
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -2041,7 +2041,6 @@ static void qeth_l2_vnicc_init(struct qeth_card *card)
 	error |= qeth_l2_vnicc_recover_timeout(card, QETH_VNICC_LEARNING,
 					       timeout);
 	chars_tmp = card->options.vnicc.wanted_chars ^ QETH_VNICC_DEFAULT;
-	chars_tmp |= QETH_VNICC_BRIDGE_INVISIBLE;
 	chars_len = sizeof(card->options.vnicc.wanted_chars) * BITS_PER_BYTE;
 	for_each_set_bit(i, &chars_tmp, chars_len) {
 		vnicc = BIT(i);
-- 
2.17.1