From: Jason Gunthorpe <jgg@xxxxxxxxxxxx>
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 <jgg@xxxxxxxxxxxx>
Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxxxx>
---
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
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