[2.6.28,1/1] cxgb3 - fix race in EEH
A SGE queue set timer might access registers while in EEH recovery,
triggering an EEH error loop. Stop all timers early in EEH process.
Signed-off-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/cxgb3/adapter.h b/drivers/net/cxgb3/adapter.h
index 4f5cc69..e9da285 100644
--- a/drivers/net/cxgb3/adapter.h
+++ b/drivers/net/cxgb3/adapter.h
@@ -284,6 +284,7 @@
void t3_sge_start(struct adapter *adap);
void t3_sge_stop(struct adapter *adap);
+void t3_stop_sge_timers(struct adapter *adap);
void t3_free_sge_resources(struct adapter *adap);
void t3_sge_err_intr_handler(struct adapter *adapter);
irq_handler_t t3_intr_handler(struct adapter *adap, int polling);
diff --git a/drivers/net/cxgb3/cxgb3_main.c b/drivers/net/cxgb3/cxgb3_main.c
index 5447f3e..d355c826 100644
--- a/drivers/net/cxgb3/cxgb3_main.c
+++ b/drivers/net/cxgb3/cxgb3_main.c
@@ -479,6 +479,7 @@
irq_idx,
&adap->params.sge.qset[qset_idx], ntxq, dev);
if (err) {
+ t3_stop_sge_timers(adap);
t3_free_sge_resources(adap);
return err;
}
@@ -2449,6 +2450,9 @@
test_bit(OFFLOAD_DEVMAP_BIT, &adapter->open_device_map))
offload_close(&adapter->tdev);
+ /* Stop SGE timers */
+ t3_stop_sge_timers(adapter);
+
adapter->flags &= ~FULL_INIT_DONE;
pci_disable_device(pdev);
@@ -2801,6 +2805,7 @@
if (test_bit(i, &adapter->registered_device_map))
unregister_netdev(adapter->port[i]);
+ t3_stop_sge_timers(adapter);
t3_free_sge_resources(adapter);
cxgb_disable_msi(adapter);
diff --git a/drivers/net/cxgb3/sge.c b/drivers/net/cxgb3/sge.c
index 89efd04..7346a8e 100644
--- a/drivers/net/cxgb3/sge.c
+++ b/drivers/net/cxgb3/sge.c
@@ -603,9 +603,6 @@
int i;
struct pci_dev *pdev = adapter->pdev;
- if (q->tx_reclaim_timer.function)
- del_timer_sync(&q->tx_reclaim_timer);
-
for (i = 0; i < SGE_RXQ_PER_SET; ++i)
if (q->fl[i].desc) {
spin_lock_irq(&adapter->sge.reg_lock);
@@ -3009,6 +3006,24 @@
}
/**
+ * t3_stop_sge_timers - stop SGE timer call backs
+ * @adap: the adapter
+ *
+ * Stops each SGE queue set's timer call back
+ */
+void t3_stop_sge_timers(struct adapter *adap)
+{
+ int i;
+
+ for (i = 0; i < SGE_QSETS; ++i) {
+ struct sge_qset *q = &adap->sge.qs[i];
+
+ if (q->tx_reclaim_timer.function)
+ del_timer_sync(&q->tx_reclaim_timer);
+ }
+}
+
+/**
* t3_free_sge_resources - free SGE resources
* @adap: the adapter
*