From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sebastian Andrzej Siewior Subject: [PATCH 2/4] net/cpsw: make sure modules remove does not leak any ressources Date: Wed, 24 Apr 2013 20:48:23 +0200 Message-ID: <1366829305-9752-3-git-send-email-bigeasy@linutronix.de> References: <1366829305-9752-1-git-send-email-bigeasy@linutronix.de> Cc: tglx@linutronix.de, netdev@vger.kernel.org, "David S. Miller" , Sebastian Andrzej Siewior To: Mugunthan V N Return-path: Received: from www.linutronix.de ([62.245.132.108]:41169 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757357Ab3DXSsg (ORCPT ); Wed, 24 Apr 2013 14:48:36 -0400 In-Reply-To: <1366829305-9752-1-git-send-email-bigeasy@linutronix.de> Sender: netdev-owner@vger.kernel.org List-ID: This driver does not clean up properly after leaving. Here is a list: - Use unregister_netdev(). free_netdev() is good but not enough - Use the above also on the other ndev in case of dual mac - Free data.slave_data. The name of the strucre makes it look like it is platform_data but it is not. It is just a trick! - Free all irqs. Again: freeing one irq is good start, but freeing all of them is better. With this rmmod & modprobe of cpsw seems to work. The remaining issue is: |WARNING: at fs/sysfs/dir.c:536 sysfs_add_one+0x9c/0xd4() |sysfs: cannot create duplicate filename '/devices/ocp.2/4a100000.ethernet/4a101000.mdio' |WARNING: at lib/kobject.c:196 kobject_add_internal+0x1a4/0x1c8() comming from of_platform_populate() and I am not sure that this belongs here. Signed-off-by: Sebastian Andrzej Siewior --- drivers/net/ethernet/ti/cpsw.c | 23 ++++++++++++++++------- 1 file changed, 16 insertions(+), 7 deletions(-) diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c index f91c8ab..1983f23 100644 --- a/drivers/net/ethernet/ti/cpsw.c +++ b/drivers/net/ethernet/ti/cpsw.c @@ -1636,7 +1636,7 @@ static int cpsw_probe_dual_emac(struct platform_device *pdev, static int cpsw_probe(struct platform_device *pdev) { - struct cpsw_platform_data *data = pdev->dev.platform_data; + struct cpsw_platform_data *data; struct net_device *ndev; struct cpsw_priv *priv; struct cpdma_params dma_params; @@ -1849,7 +1849,7 @@ static int cpsw_probe(struct platform_device *pdev) goto clean_ale_ret; } priv->irqs_table[k] = i; - priv->num_irqs = k; + priv->num_irqs = k + 1; } k++; } @@ -1887,7 +1887,8 @@ static int cpsw_probe(struct platform_device *pdev) return 0; clean_irq_ret: - free_irq(ndev->irq, priv); + for (i = 0; i < priv->num_irqs; i++) + free_irq(priv->irqs_table[i], priv); clean_ale_ret: cpsw_ale_destroy(priv->ale); clean_dma_ret: @@ -1910,7 +1911,8 @@ static int cpsw_probe(struct platform_device *pdev) pm_runtime_disable(&pdev->dev); kfree(priv->slaves); clean_ndev_ret: - free_netdev(ndev); + kfree(priv->data.slave_data); + free_netdev(priv->ndev); return ret; } @@ -1918,12 +1920,17 @@ static int cpsw_remove(struct platform_device *pdev) { struct net_device *ndev = platform_get_drvdata(pdev); struct cpsw_priv *priv = netdev_priv(ndev); + int i; - pr_info("removing device"); platform_set_drvdata(pdev, NULL); + if (priv->data.dual_emac) + unregister_netdev(cpsw_get_slave_ndev(priv, 1)); + unregister_netdev(ndev); cpts_unregister(priv->cpts); - free_irq(ndev->irq, priv); + for (i = 0; i < priv->num_irqs; i++) + free_irq(priv->irqs_table[i], priv); + cpsw_ale_destroy(priv->ale); cpdma_chan_destroy(priv->txch); cpdma_chan_destroy(priv->rxch); @@ -1937,8 +1944,10 @@ static int cpsw_remove(struct platform_device *pdev) pm_runtime_disable(&pdev->dev); clk_put(priv->clk); kfree(priv->slaves); + kfree(priv->data.slave_data); + if (priv->data.dual_emac) + free_netdev(cpsw_get_slave_ndev(priv, 1)); free_netdev(ndev); - return 0; } -- 1.7.10.4