netdev - [PATCH net-next v2 3/6] net/ncsi: Don't deselect package in suspend if active

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Message-Id: <20181023215201.27315-4-sam@mendozajonas.com>
Date:   Wed, 24 Oct 2018 10:51:58 +1300
From:   Samuel Mendoza-Jonas <sam@...dozajonas.com>
To:     netdev@...r.kernel.org
Cc:     Samuel Mendoza-Jonas <sam@...dozajonas.com>,
        "David S . Miller" <davem@...emloft.net>, Justin.Lee1@...l.com,
        linux-kernel@...r.kernel.org, openbmc@...ts.ozlabs.org
Subject: [PATCH net-next v2 3/6] net/ncsi: Don't deselect package in suspend if active

When a package is deselected all channels of that package cease
communication. If there are other channels active on the package of the
suspended channel this will disable them as well, so only send a
deselect-package command if no other channels are active.

Signed-off-by: Samuel Mendoza-Jonas <sam@...dozajonas.com>
---
 net/ncsi/ncsi-manage.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/net/ncsi/ncsi-manage.c b/net/ncsi/ncsi-manage.c
index 6c62aae10205..013437b42e94 100644
--- a/net/ncsi/ncsi-manage.c
+++ b/net/ncsi/ncsi-manage.c
@@ -440,12 +440,14 @@ static void ncsi_request_timeout(struct timer_list *t)
 static void ncsi_suspend_channel(struct ncsi_dev_priv *ndp)
 {
 	struct ncsi_dev *nd = &ndp->ndev;
-	struct ncsi_package *np = ndp->active_package;
-	struct ncsi_channel *nc = ndp->active_channel;
+	struct ncsi_package *np;
+	struct ncsi_channel *nc, *tmp;
 	struct ncsi_cmd_arg nca;
 	unsigned long flags;
 	int ret;
 
+	np = ndp->active_package;
+	nc = ndp->active_channel;
 	nca.ndp = ndp;
 	nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN;
 	switch (nd->state) {
@@ -521,6 +523,15 @@ static void ncsi_suspend_channel(struct ncsi_dev_priv *ndp)
 		if (ret)
 			goto error;
 
+		NCSI_FOR_EACH_CHANNEL(np, tmp) {
+			/* If there is another channel active on this package
+			 * do not deselect the package.
+			 */
+			if (tmp != nc && tmp->state == NCSI_CHANNEL_ACTIVE) {
+				nd->state = ncsi_dev_state_suspend_done;
+				break;
+			}
+		}
 		break;
 	case ncsi_dev_state_suspend_deselect:
 		ndp->pending_req_num = 1;
-- 
2.19.1