netdev - [PATCH net-next v2 2/3] net: lan966x: Fix return value check for vcap_get

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Message-ID: <20230818050505.3634668-3-ruanjinjie@huawei.com>
Date: Fri, 18 Aug 2023 13:05:04 +0800
From: Ruan Jinjie <ruanjinjie@...wei.com>
To: <horatiu.vultur@...rochip.com>, <davem@...emloft.net>,
	<edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>,
	<lars.povlsen@...rochip.com>, <Steen.Hegelund@...rochip.com>,
	<daniel.machon@...rochip.com>, <richardcochran@...il.com>,
	<horms@...nel.org>, <netdev@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
CC: <ruanjinjie@...wei.com>
Subject: [PATCH net-next v2 2/3] net: lan966x: Fix return value check for vcap_get_rule()

As Simon Horman suggests, update vcap_get_rule() to always
return an ERR_PTR() and update the error detection conditions to
use IS_ERR(), so use IS_ERR() to fix the return value issue.

Fixes: 72df3489fb10 ("net: lan966x: Add ptp trap rules")
Signed-off-by: Ruan Jinjie <ruanjinjie@...wei.com>
Suggested-by: Simon Horman <horms@...nel.org>
---
v2:
- Update vcap_get_rule() to always return ERR_PTR instead of checking IS_ERR_OR_NULL()
- Update the commit message.
- Check IS_ERR() instead of NULL.
---
 drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c b/drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c
index 60bd0cff6677..63905bb5a63a 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c
@@ -59,7 +59,7 @@ static int lan966x_ptp_add_trap(struct lan966x_port *port,
 	int err;
 
 	vrule = vcap_get_rule(lan966x->vcap_ctrl, rule_id);
-	if (vrule) {
+	if (!IS_ERR(vrule)) {
 		u32 value, mask;
 
 		/* Just modify the ingress port mask and exit */
@@ -106,7 +106,7 @@ static int lan966x_ptp_del_trap(struct lan966x_port *port,
 	int err;
 
 	vrule = vcap_get_rule(lan966x->vcap_ctrl, rule_id);
-	if (!vrule)
+	if (IS_ERR(vrule))
 		return -EEXIST;
 
 	vcap_rule_get_key_u32(vrule, VCAP_KF_IF_IGR_PORT_MASK, &value, &mask);
-- 
2.34.1