linux-kernel - [PATCH 4.19 597/639] s390/qeth: Fix initialization of vnicc cmd masks during set online

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Message-Id: <20200124093204.146493671@linuxfoundation.org>
Date:   Fri, 24 Jan 2020 10:32:47 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Alexandra Winter <wintera@...ux.ibm.com>,
        Julian Wiedmann <jwi@...ux.ibm.com>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 597/639] s390/qeth: Fix initialization of vnicc cmd masks during set online

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

[ Upstream commit be40a86c319706f90caca144343c64743c32b953 ]

Without this patch, a command bit in the supported commands mask is only
ever set to unsupported during set online. If a command is ever marked as
unsupported (e.g. because of error during qeth_l2_vnicc_query_cmds),
subsequent successful initialization (offline/online) would not bring it
back.

Fixes: caa1f0b10d18 ("s390/qeth: add VNICC enable/disable support")
Signed-off-by: Alexandra Winter <wintera@...ux.ibm.com>
Signed-off-by: Julian Wiedmann <jwi@...ux.ibm.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/s390/net/qeth_l2_main.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
index b9be2c08e8dfa..aa90004f49e28 100644
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -2358,11 +2358,15 @@ static void qeth_l2_vnicc_init(struct qeth_card *card)
 			sup_cmds = 0;
 			error = true;
 		}
-		if (!(sup_cmds & IPA_VNICC_SET_TIMEOUT) ||
-		    !(sup_cmds & IPA_VNICC_GET_TIMEOUT))
+		if ((sup_cmds & IPA_VNICC_SET_TIMEOUT) &&
+		    (sup_cmds & IPA_VNICC_GET_TIMEOUT))
+			card->options.vnicc.getset_timeout_sup |= vnicc;
+		else
 			card->options.vnicc.getset_timeout_sup &= ~vnicc;
-		if (!(sup_cmds & IPA_VNICC_ENABLE) ||
-		    !(sup_cmds & IPA_VNICC_DISABLE))
+		if ((sup_cmds & IPA_VNICC_ENABLE) &&
+		    (sup_cmds & IPA_VNICC_DISABLE))
+			card->options.vnicc.set_char_sup |= vnicc;
+		else
 			card->options.vnicc.set_char_sup &= ~vnicc;
 	}
 	/* enforce assumed default values and recover settings, if changed  */
-- 
2.20.1