qlge:Fix crash caused by mailbox execution on wedged chip.

When we are in a recover process from a chip fatal error,
	driver should skip over execution of mailbox commands during
	resetting chip.

Signed-off-by: Jitendra Kalsaria <jitendra.kalsaria@qlogic.com>
Signed-off-by: Ron Mercer <ron.mercer@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/qlge/qlge.h b/drivers/net/qlge/qlge.h
index d328507..b2c8612 100644 (file)
--- a/drivers/net/qlge/qlge.h
+++ b/drivers/net/qlge/qlge.h
@@ -1996,6 +1996,7 @@ enum {
        QL_LB_LINK_UP = 10,
        QL_FRC_COREDUMP = 11,
        QL_EEH_FATAL = 12,
+       QL_ASIC_RECOVERY = 14, /* We are in ascic recovery. */
 };
 
 /* link_status bit definitions */

diff --git a/drivers/net/qlge/qlge_main.c b/drivers/net/qlge/qlge_main.c
index 930ae45..4fbefcf 100644 (file)
--- a/drivers/net/qlge/qlge_main.c
+++ b/drivers/net/qlge/qlge_main.c
@@ -2152,6 +2152,10 @@ void ql_queue_asic_error(struct ql_adapter *qdev)
         * thread
         */
        clear_bit(QL_ADAPTER_UP, &qdev->flags);
+       /* Set asic recovery bit to indicate reset process that we are
+        * in fatal error recovery process rather than normal close
+        */
+       set_bit(QL_ASIC_RECOVERY, &qdev->flags);
        queue_delayed_work(qdev->workqueue, &qdev->asic_reset_work, 0);
 }
 
@@ -3818,11 +3822,17 @@ static int ql_adapter_reset(struct ql_adapter *qdev)
        end_jiffies = jiffies +
                max((unsigned long)1, usecs_to_jiffies(30));
 
-       /* Stop management traffic. */
-       ql_mb_set_mgmnt_traffic_ctl(qdev, MB_SET_MPI_TFK_STOP);
+       /* Check if bit is set then skip the mailbox command and
+        * clear the bit, else we are in normal reset process.
+        */
+       if (!test_bit(QL_ASIC_RECOVERY, &qdev->flags)) {
+               /* Stop management traffic. */
+               ql_mb_set_mgmnt_traffic_ctl(qdev, MB_SET_MPI_TFK_STOP);
 
-       /* Wait for the NIC and MGMNT FIFOs to empty. */
-       ql_wait_fifo_empty(qdev);
+               /* Wait for the NIC and MGMNT FIFOs to empty. */
+               ql_wait_fifo_empty(qdev);
+       } else
+               clear_bit(QL_ASIC_RECOVERY, &qdev->flags);
 
        ql_write32(qdev, RST_FO, (RST_FO_FR << 16) | RST_FO_FR);