linux-kernel - [RFC PATCH v2 1/4] net: dsa: allow switch drivers to cleanup their resources

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Message-ID: <5630D7E9.4020609@baylibre.com>
Date:	Wed, 28 Oct 2015 15:12:57 +0100
From:	Neil Armstrong <narmstrong@...libre.com>
To:	"David S. Miller" <davem@...emloft.net>
Cc:	Andrew Lunn <andrew@...n.ch>,
	Florian Fainelli <f.fainelli@...il.com>,
	Guenter Roeck <linux@...ck-us.net>,
	vivien.didelot@...oirfairelinux.com,
	Fabian Frederick <fabf@...net.be>,
	Pavel Nakonechny <pavel.nakonechny@...tlab.ru>,
	Joe Perches <joe@...ches.com>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [RFC PATCH v2 1/4] net: dsa: allow switch drivers to cleanup their
 resources

Some switch drivers might request interrupts, remap register ranges,
allow such drivers to implement a "remove" callback doing just that.

Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
---
 include/net/dsa.h | 1 +
 net/dsa/dsa.c     | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/include/net/dsa.h b/include/net/dsa.h
index 98ccbde..0e1502c 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -212,6 +212,7 @@ struct dsa_switch_driver {
 	 */
 	char	*(*probe)(struct device *host_dev, int sw_addr);
 	int	(*setup)(struct dsa_switch *ds);
+	void	(*remove)(struct dsa_switch *ds);
 	int	(*set_addr)(struct dsa_switch *ds, u8 *addr);
 	u32	(*get_phy_flags)(struct dsa_switch *ds, int port);

diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index 1eba07f..f462fc5 100644
--- a/net/dsa/dsa.c
+++ b/net/dsa/dsa.c
@@ -459,6 +459,10 @@ static void dsa_switch_destroy(struct dsa_switch *ds)
 	}

 	mdiobus_unregister(ds->slave_mii_bus);
+
+	/* Leave a chance to the driver to cleanup */
+	if (ds->drv->remove)
+		ds->drv->remove(ds);
 }

 #ifdef CONFIG_PM_SLEEP
-- 
1.9.1
--
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