cnic: Fix locking in start/stop calls.

The slow path ulp_start and ulp_stop calls to the bnx2i driver
are sleepable calls and therefore should not be protected using
rcu_read_lock.  Fix it by using mutex and setting a bit during
these calls.  cnic_unregister_device() will now wait for the bit
to clear before completing the call.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Reviewed-by: Benjamin Li <benli@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/net/cnic.h b/drivers/net/cnic.h
index 5192d4a9df5a..a94b302bb464 100644
--- a/drivers/net/cnic.h
+++ b/drivers/net/cnic.h
@@ -176,6 +176,7 @@ struct cnic_local {
         unsigned long ulp_flags[MAX_CNIC_ULP_TYPE];
 #define ULP_F_INIT      0
 #define ULP_F_START     1
+#define ULP_F_CALL_PENDING      2
         struct cnic_ulp_ops *ulp_ops[MAX_CNIC_ULP_TYPE];
 
         /* protected by ulp_lock */