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authorThomas Falcon <tlfalcon@linux.vnet.ibm.com>2018-05-24 14:37:53 -0500
committerDavid S. Miller <davem@davemloft.net>2018-05-25 16:32:48 -0400
commiteb110410b9f6477726026669f3f0c0567e8241e6 (patch)
tree02ae95f908d6d915c7833e68229d638cf150018b
parentd2f30f5172603bacaf34f0fdb021c25ad1915b05 (diff)
downloadlinux-stericsson-eb110410b9f6477726026669f3f0c0567e8241e6.tar.gz
ibmvnic: Fix partial success login retries
In its current state, the driver will handle backing device login in a loop for a certain number of retries while the device returns a partial success, indicating that the driver may need to try again using a smaller number of resources. The variable it checks to continue retrying may change over the course of operations, resulting in reallocation of resources but exits without sending the login attempt. Guard against this by introducing a boolean variable that will retain the state indicating that the driver needs to reattempt login with backing device firmware. Signed-off-by: Thomas Falcon <tlfalcon@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/ethernet/ibm/ibmvnic.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index 62cd3602c633..5ec1185808e5 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -796,9 +796,11 @@ static int ibmvnic_login(struct net_device *netdev)
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
unsigned long timeout = msecs_to_jiffies(30000);
int retry_count = 0;
+ bool retry;
int rc;
do {
+ retry = false;
if (retry_count > IBMVNIC_MAX_QUEUES) {
netdev_warn(netdev, "Login attempts exceeded\n");
return -1;
@@ -822,6 +824,9 @@ static int ibmvnic_login(struct net_device *netdev)
retry_count++;
release_sub_crqs(adapter, 1);
+ retry = true;
+ netdev_dbg(netdev,
+ "Received partial success, retrying...\n");
adapter->init_done_rc = 0;
reinit_completion(&adapter->init_done);
send_cap_queries(adapter);
@@ -849,7 +854,7 @@ static int ibmvnic_login(struct net_device *netdev)
netdev_warn(netdev, "Adapter login failed\n");
return -1;
}
- } while (adapter->init_done_rc == PARTIALSUCCESS);
+ } while (retry);
/* handle pending MAC address changes after successful login */
if (adapter->mac_change_pending) {