From mboxrd@z Thu Jan 1 00:00:00 1970 From: Leon Romanovsky Subject: [PATCH rdma-next 01/10] IB/ipoib: Get rid of IPOIB_FLAG_GOING_DOWN Date: Sun, 29 Jul 2018 11:34:51 +0300 Message-ID: <20180729083500.5352-2-leon@kernel.org> References: <20180729083500.5352-1-leon@kernel.org> Cc: Leon Romanovsky , RDMA mailing list , Denis Drozdov , Erez Shitrit , Saeed Mahameed , linux-netdev To: Doug Ledford , Jason Gunthorpe Return-path: Received: from mail.kernel.org ([198.145.29.99]:58124 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725749AbeG2KEt (ORCPT ); Sun, 29 Jul 2018 06:04:49 -0400 In-Reply-To: <20180729083500.5352-1-leon@kernel.org> Sender: netdev-owner@vger.kernel.org List-ID: From: Jason Gunthorpe This essentially duplicates the netdev's reg_state, so just use that directly. The reg_state is updated under the rntl_lock, and all places using GOING_DOWN already acquire the rtnl_lock so checking is safe. Since the only place we use GOING_DOWN is for the parent device this does not fix any bugs, but it is a step to tidy up the unregister flow so that after later patches the flow is uniform and sane. Signed-off-by: Jason Gunthorpe Signed-off-by: Leon Romanovsky --- drivers/infiniband/ulp/ipoib/ipoib.h | 1 - drivers/infiniband/ulp/ipoib/ipoib_cm.c | 9 ++++++--- drivers/infiniband/ulp/ipoib/ipoib_main.c | 3 --- drivers/infiniband/ulp/ipoib/ipoib_vlan.c | 18 ++++++++++++------ 4 files changed, 18 insertions(+), 13 deletions(-) diff --git a/drivers/infiniband/ulp/ipoib/ipoib.h b/drivers/infiniband/ulp/ipoib/ipoib.h index e255a7e5a4c3..9eebb705d994 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib.h +++ b/drivers/infiniband/ulp/ipoib/ipoib.h @@ -95,7 +95,6 @@ enum { IPOIB_NEIGH_TBL_FLUSH = 12, IPOIB_FLAG_DEV_ADDR_SET = 13, IPOIB_FLAG_DEV_ADDR_CTRL = 14, - IPOIB_FLAG_GOING_DOWN = 15, IPOIB_MAX_BACKOFF_SECONDS = 16, diff --git a/drivers/infiniband/ulp/ipoib/ipoib_cm.c b/drivers/infiniband/ulp/ipoib/ipoib_cm.c index 8b44f33c7ae0..83fa402e5d03 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_cm.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_cm.c @@ -1516,9 +1516,6 @@ static ssize_t set_mode(struct device *d, struct device_attribute *attr, int ret; struct ipoib_dev_priv *priv = ipoib_priv(dev); - if (test_bit(IPOIB_FLAG_GOING_DOWN, &priv->flags)) - return -EPERM; - if (!mutex_trylock(&priv->sysfs_mutex)) return restart_syscall(); @@ -1527,6 +1524,12 @@ static ssize_t set_mode(struct device *d, struct device_attribute *attr, return restart_syscall(); } + if (dev->reg_state != NETREG_REGISTERED) { + rtnl_unlock(); + mutex_unlock(&priv->sysfs_mutex); + return -EPERM; + } + ret = ipoib_set_mode(dev, buf); /* The assumption is that the function ipoib_set_mode returned diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c index 82f0e3869b04..7ca9013bf05c 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_main.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c @@ -2406,9 +2406,6 @@ static void ipoib_remove_one(struct ib_device *device, void *client_data) ib_unregister_event_handler(&priv->event_handler); flush_workqueue(ipoib_workqueue); - /* mark interface in the middle of destruction */ - set_bit(IPOIB_FLAG_GOING_DOWN, &priv->flags); - rtnl_lock(); dev_change_flags(priv->dev, priv->dev->flags & ~IFF_UP); rtnl_unlock(); diff --git a/drivers/infiniband/ulp/ipoib/ipoib_vlan.c b/drivers/infiniband/ulp/ipoib/ipoib_vlan.c index b067ad5e4c7e..1b7bfd500893 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_vlan.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_vlan.c @@ -127,9 +127,6 @@ int ipoib_vlan_add(struct net_device *pdev, unsigned short pkey) ppriv = ipoib_priv(pdev); - if (test_bit(IPOIB_FLAG_GOING_DOWN, &ppriv->flags)) - return -EPERM; - snprintf(intf_name, sizeof(intf_name), "%s.%04x", ppriv->dev->name, pkey); @@ -141,6 +138,12 @@ int ipoib_vlan_add(struct net_device *pdev, unsigned short pkey) return restart_syscall(); } + if (pdev->reg_state != NETREG_REGISTERED) { + rtnl_unlock(); + mutex_unlock(&ppriv->sysfs_mutex); + return -EPERM; + } + if (!down_write_trylock(&ppriv->vlan_rwsem)) { rtnl_unlock(); mutex_unlock(&ppriv->sysfs_mutex); @@ -199,9 +202,6 @@ int ipoib_vlan_delete(struct net_device *pdev, unsigned short pkey) ppriv = ipoib_priv(pdev); - if (test_bit(IPOIB_FLAG_GOING_DOWN, &ppriv->flags)) - return -EPERM; - if (!mutex_trylock(&ppriv->sysfs_mutex)) return restart_syscall(); @@ -210,6 +210,12 @@ int ipoib_vlan_delete(struct net_device *pdev, unsigned short pkey) return restart_syscall(); } + if (pdev->reg_state != NETREG_REGISTERED) { + rtnl_unlock(); + mutex_unlock(&ppriv->sysfs_mutex); + return -EPERM; + } + if (!down_write_trylock(&ppriv->vlan_rwsem)) { rtnl_unlock(); mutex_unlock(&ppriv->sysfs_mutex); -- 2.14.4