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authorMichael Chan <mchan@broadcom.com>2009-07-27 11:25:58 -0700
committerDavid S. Miller <davem@davemloft.net>2009-07-27 11:25:58 -0700
commit6d7760a88c25057c2c2243e5dfe2d731064bd31d (patch)
tree6bc0eba235e8a4cd3ada1627cffa2ca7c6e60d4d
parent0cbb0a781a42f131e9c6836554f402cb85f8f38b (diff)
cnic: Fix ISCSI_KEVENT_IF_DOWN message handling.
When a net device goes down or when the bnx2i driver is unloaded, the code was not generating the ISCSI_KEVENT_IF_DOWN message properly and this could cause the userspace driver to crash. This is fixed by sending the message properly in the shutdown path. cnic_uio_stop() is also added to send the message when bnx2i is unregistering. Signed-off-by: Michael Chan <mchan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/cnic.c23
1 files changed, 21 insertions, 2 deletions
diff --git a/drivers/net/cnic.c b/drivers/net/cnic.c
index 4d1515f45ba2..4869d77cbe91 100644
--- a/drivers/net/cnic.c
+++ b/drivers/net/cnic.c
@@ -227,7 +227,7 @@ static int cnic_send_nlmsg(struct cnic_local *cp, u32 type,
}
rcu_read_lock();
- ulp_ops = rcu_dereference(cp->ulp_ops[CNIC_ULP_ISCSI]);
+ ulp_ops = rcu_dereference(cnic_ulp_tbl[CNIC_ULP_ISCSI]);
if (ulp_ops)
ulp_ops->iscsi_nl_send_msg(cp->dev, msg_type, buf, len);
rcu_read_unlock();
@@ -319,6 +319,20 @@ static int cnic_abort_prep(struct cnic_sock *csk)
return 0;
}
+static void cnic_uio_stop(void)
+{
+ struct cnic_dev *dev;
+
+ read_lock(&cnic_dev_lock);
+ list_for_each_entry(dev, &cnic_dev_list, list) {
+ struct cnic_local *cp = dev->cnic_priv;
+
+ if (cp->cnic_uinfo)
+ cnic_send_nlmsg(cp, ISCSI_KEVENT_IF_DOWN, NULL);
+ }
+ read_unlock(&cnic_dev_lock);
+}
+
int cnic_register_driver(int ulp_type, struct cnic_ulp_ops *ulp_ops)
{
struct cnic_dev *dev;
@@ -390,6 +404,9 @@ int cnic_unregister_driver(int ulp_type)
}
read_unlock(&cnic_dev_lock);
+ if (ulp_type == CNIC_ULP_ISCSI)
+ cnic_uio_stop();
+
rcu_assign_pointer(cnic_ulp_tbl[ulp_type], NULL);
mutex_unlock(&cnic_lock);
@@ -632,7 +649,6 @@ static void cnic_free_resc(struct cnic_dev *dev)
int i = 0;
if (cp->cnic_uinfo) {
- cnic_send_nlmsg(cp, ISCSI_KEVENT_IF_DOWN, NULL);
while (cp->uio_dev != -1 && i < 15) {
msleep(100);
i++;
@@ -1057,6 +1073,9 @@ static void cnic_ulp_stop(struct cnic_dev *dev)
struct cnic_local *cp = dev->cnic_priv;
int if_type;
+ if (cp->cnic_uinfo)
+ cnic_send_nlmsg(cp, ISCSI_KEVENT_IF_DOWN, NULL);
+
rcu_read_lock();
for (if_type = 0; if_type < MAX_CNIC_ULP_TYPE; if_type++) {
struct cnic_ulp_ops *ulp_ops;