linux-kernel - [PATCH net] net: prestera: span: do not unbind things things that were never bound

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Message-Id: <20221006190600.881740-1-maksym.glubokiy@plvision.eu>
Date:   Thu,  6 Oct 2022 22:06:00 +0300
From:   Maksym Glubokiy <maksym.glubokiy@...ision.eu>
To:     Taras Chornyi <tchornyi@...vell.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Serhiy Boiko <serhiy.boiko@...ision.eu>,
        Vadym Kochan <vkochan@...vell.com>,
        Volodymyr Mytnyk <vmytnyk@...vell.com>
Cc:     Maksym Glubokiy <maksym.glubokiy@...ision.eu>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH net] net: prestera: span: do not unbind things things that were never bound

Fixes: 13defa275eef ("net: marvell: prestera: Add matchall support")
Signed-off-by: Maksym Glubokiy <maksym.glubokiy@...ision.eu>
---
 drivers/net/ethernet/marvell/prestera/prestera_span.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/marvell/prestera/prestera_span.c b/drivers/net/ethernet/marvell/prestera/prestera_span.c
index f0e9d6ea88c5..1005182ce3bc 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera_span.c
+++ b/drivers/net/ethernet/marvell/prestera/prestera_span.c
@@ -107,7 +107,7 @@ static int prestera_span_put(struct prestera_switch *sw, u8 span_id)
 
 	entry = prestera_span_entry_find_by_id(sw->span, span_id);
 	if (!entry)
-		return false;
+		return -ENOENT;
 
 	if (!refcount_dec_and_test(&entry->ref_count))
 		return 0;
@@ -151,6 +151,9 @@ int prestera_span_rule_del(struct prestera_flow_block_binding *binding,
 {
 	int err;
 
+	if (binding->span_id == PRESTERA_SPAN_INVALID_ID)
+		return -ENOENT;
+
 	err = prestera_hw_span_unbind(binding->port, ingress);
 	if (err)
 		return err;
-- 
2.25.1