[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-ID: <1578886243-43953-1-git-send-email-mparab@cadence.com>
Date: Mon, 13 Jan 2020 03:30:43 +0000
From: Milind Parab <mparab@...ence.com>
To: <nicolas.ferre@...rochip.com>, <jakub.kicinski@...ronome.com>,
<andrew@...n.ch>, <antoine.tenart@...tlin.com>,
<rmk+kernel@...linux.org.uk>
CC: <Claudiu.Beznea@...rochip.com>, <f.fainelli@...il.com>,
<davem@...emloft.net>, <netdev@...r.kernel.org>,
<hkallweit1@...il.com>, <linux-kernel@...r.kernel.org>,
<dkangude@...ence.com>, <a.fatoum@...gutronix.de>,
<brad.mouring@...com>, <pthombar@...ence.com>,
Milind Parab <mparab@...ence.com>
Subject: [PATCH v3 net] net: macb: fix for fixed-link mode
This patch fix the issue with fixed link. With fixed-link
device opening fails due to macb_phylink_connect not
handling fixed-link mode, in which case no MAC-PHY connection
is needed and phylink_connect return success (0), however
in current driver attempt is made to search and connect to
PHY even for fixed-link.
Fixes: 7897b071ac3b ("net: macb: convert to phylink")
Signed-off-by: Milind Parab <mparab@...ence.com>
---
Changes in v2:
1. Code refactoring to remove extra if condition
Changes in v3:
1. Reverse christmas tree ordering of local variables
---
drivers/net/ethernet/cadence/macb_main.c | 30 ++++++++++++++----------
1 file changed, 17 insertions(+), 13 deletions(-)
diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index 1c547ee0d444..7a2fe63d1136 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -650,21 +650,24 @@ static const struct phylink_mac_ops macb_phylink_ops = {
.mac_link_up = macb_mac_link_up,
};
+static bool macb_phy_handle_exists(struct device_node *dn)
+{
+ dn = of_parse_phandle(dn, "phy-handle", 0);
+ of_node_put(dn);
+ return dn != NULL;
+}
+
static int macb_phylink_connect(struct macb *bp)
{
+ struct device_node *dn = bp->pdev->dev.of_node;
struct net_device *dev = bp->dev;
struct phy_device *phydev;
int ret;
- if (bp->pdev->dev.of_node &&
- of_parse_phandle(bp->pdev->dev.of_node, "phy-handle", 0)) {
- ret = phylink_of_phy_connect(bp->phylink, bp->pdev->dev.of_node,
- 0);
- if (ret) {
- netdev_err(dev, "Could not attach PHY (%d)\n", ret);
- return ret;
- }
- } else {
+ if (dn)
+ ret = phylink_of_phy_connect(bp->phylink, dn, 0);
+
+ if (!dn || (ret && !macb_phy_handle_exists(dn))) {
phydev = phy_find_first(bp->mii_bus);
if (!phydev) {
netdev_err(dev, "no PHY found\n");
@@ -673,10 +676,11 @@ static int macb_phylink_connect(struct macb *bp)
/* attach the mac to the phy */
ret = phylink_connect_phy(bp->phylink, phydev);
- if (ret) {
- netdev_err(dev, "Could not attach to PHY (%d)\n", ret);
- return ret;
- }
+ }
+
+ if (ret) {
+ netdev_err(dev, "Could not attach PHY (%d)\n", ret);
+ return ret;
}
phylink_start(bp->phylink);
--
2.17.1
Powered by blists - more mailing lists