[PATCH 2/2] ixgbe: Use refcount_t for refcount

[Chuhong Yuan]

refcount_t is better for reference counters since its
implementation can prevent overflows.
So convert atomic_t ref counters to refcount_t.

Also convert refcount from 0-based to 1-based.

This patch depends on PATCH 1/2.

Signed-off-by: Chuhong Yuan <hsleste...@gmail.com>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c | 6 +++---
 drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.h | 2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c 
b/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c
index 00710f43cfd2..d313d00065cd 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c
@@ -773,7 +773,7 @@ int ixgbe_setup_fcoe_ddp_resources(struct ixgbe_adapter 
*adapter)
 
        fcoe->extra_ddp_buffer = buffer;
        fcoe->extra_ddp_buffer_dma = dma;
-       atomic_set(&fcoe->refcnt, 0);
+       refcount_set(&fcoe->refcnt, 1);
 
        /* allocate pci pool for each cpu */
        for_each_possible_cpu(cpu) {
@@ -837,7 +837,7 @@ int ixgbe_fcoe_enable(struct net_device *netdev)
        struct ixgbe_adapter *adapter = netdev_priv(netdev);
        struct ixgbe_fcoe *fcoe = &adapter->fcoe;
 
-       atomic_inc(&fcoe->refcnt);
+       refcount_inc(&fcoe->refcnt);
 
        if (!(adapter->flags & IXGBE_FLAG_FCOE_CAPABLE))
                return -EINVAL;
@@ -883,7 +883,7 @@ int ixgbe_fcoe_disable(struct net_device *netdev)
 {
        struct ixgbe_adapter *adapter = netdev_priv(netdev);
 
-       if (!atomic_dec_and_test(&adapter->fcoe.refcnt))
+       if (!refcount_dec_and_test(&adapter->fcoe.refcnt))
                return -EINVAL;
 
        if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.h 
b/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.h
index 724f5382329f..7ace5fee6ede 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.h
@@ -51,7 +51,7 @@ struct ixgbe_fcoe_ddp_pool {
 
 struct ixgbe_fcoe {
        struct ixgbe_fcoe_ddp_pool __percpu *ddp_pool;
-       atomic_t refcnt;
+       refcount_t refcnt;
        spinlock_t lock;
        struct ixgbe_fcoe_ddp ddp[IXGBE_FCOE_DDP_MAX_X550];
        void *extra_ddp_buffer;
-- 
2.20.1