Commit 0ca41c04 authored by Divy Le Ray's avatar Divy Le Ray Committed by David S. Miller
Browse files

[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: default avatarDivy Le Ray <divy@chelsio.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 822f1a57

drivers/net/cxgb3/adapter.h

+1 −0
Original line number Diff line number Diff line
@@ -284,6 +284,7 @@ void t3_os_link_changed(struct adapter *adapter, int port_id, int link_status, 


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);

drivers/net/cxgb3/cxgb3_main.c

+5 −0
Original line number Diff line number Diff line
@@ -479,6 +479,7 @@ static int setup_sge_qsets(struct adapter *adap) 
							     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 @@ static pci_ers_result_t t3_io_error_detected(struct pci_dev *pdev, 
	    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 @@ static void __devexit remove_one(struct pci_dev *pdev) 
		    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);

drivers/net/cxgb3/sge.c

+18 −3
Original line number Diff line number Diff line
@@ -603,9 +603,6 @@ static void t3_free_qset(struct adapter *adapter, struct sge_qset *q) 
	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);
@@ -3008,6 +3005,24 @@ err: 
	return ret;

}



/**

 *	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

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