linux-kernel - [RFC PATCH v2 2/4] net: dsa: bcm_sf2: cleanup resources in remove callback

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Message-ID: <5630D7F3.2000508@baylibre.com>
Date:	Wed, 28 Oct 2015 15:13:07 +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 2/4] net: dsa: bcm_sf2: cleanup resources in remove
 callback

Implement a remove callback allowing the switch driver to cleanup
resources it used: interrupts and remapped register ranges.

Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
---
 drivers/net/dsa/bcm_sf2.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c
index 6f946fe..e0be318 100644
--- a/drivers/net/dsa/bcm_sf2.c
+++ b/drivers/net/dsa/bcm_sf2.c
@@ -1054,6 +1054,25 @@ out_unmap:
 	return ret;
 }

+static void bcm_sf2_sw_remove(struct dsa_switch *ds)
+{
+	struct bcm_sf2_priv *priv = ds_to_priv(ds);
+	void __iomem **base;
+	unsigned int i;
+
+	/* Disable all interrupts and free them */
+	bcm_sf2_intr_disable(priv);
+
+	free_irq(priv->irq0, priv);
+	free_irq(priv->irq1, priv);
+
+	base = &priv->core;
+	for (i = 0; i < BCM_SF2_REGS_NUM; i++) {
+		iounmap(*base);
+		base++;
+	}
+}
+
 static int bcm_sf2_sw_set_addr(struct dsa_switch *ds, u8 *addr)
 {
 	return 0;
@@ -1367,6 +1386,7 @@ static struct dsa_switch_driver bcm_sf2_switch_driver = {
 	.tag_protocol		= DSA_TAG_PROTO_BRCM,
 	.priv_size		= sizeof(struct bcm_sf2_priv),
 	.probe			= bcm_sf2_sw_probe,
+	.remove			= bcm_sf2_sw_remove,
 	.setup			= bcm_sf2_sw_setup,
 	.set_addr		= bcm_sf2_sw_set_addr,
 	.get_phy_flags		= bcm_sf2_sw_get_phy_flags,
-- 
1.9.1
--
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