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Subject[PATCH v2 1/2] bnxt_en: Use refcount_t for refcount
Date
refcount_t is better for reference counters since its
implementation can prevent overflows.
So convert atomic_t ref counters to refcount_t.

Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
---
Changes in v2:
- Convert refcount from 0-base to 1-base.

drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c | 8 ++++----
drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.h | 2 +-
2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c
index fc77caf0a076..742a8ed200cb 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.c
@@ -49,7 +49,7 @@ static int bnxt_register_dev(struct bnxt_en_dev *edev, int ulp_id,
return -ENOMEM;
}

- atomic_set(&ulp->ref_count, 0);
+ refcount_set(&ulp->ref_count, 1);
ulp->handle = handle;
rcu_assign_pointer(ulp->ulp_ops, ulp_ops);

@@ -87,7 +87,7 @@ static int bnxt_unregister_dev(struct bnxt_en_dev *edev, int ulp_id)
synchronize_rcu();
ulp->max_async_event_id = 0;
ulp->async_events_bmap = NULL;
- while (atomic_read(&ulp->ref_count) != 0 && i < 10) {
+ while (refcount_read(&ulp->ref_count) != 1 && i < 10) {
msleep(100);
i++;
}
@@ -246,12 +246,12 @@ static int bnxt_send_msg(struct bnxt_en_dev *edev, int ulp_id,

static void bnxt_ulp_get(struct bnxt_ulp *ulp)
{
- atomic_inc(&ulp->ref_count);
+ refcount_inc(&ulp->ref_count);
}

static void bnxt_ulp_put(struct bnxt_ulp *ulp)
{
- atomic_dec(&ulp->ref_count);
+ refcount_dec(&ulp->ref_count);
}

void bnxt_ulp_stop(struct bnxt *bp)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.h b/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.h
index cd78453d0bf0..fc4aa582d190 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ulp.h
@@ -52,7 +52,7 @@ struct bnxt_ulp {
u16 max_async_event_id;
u16 msix_requested;
u16 msix_base;
- atomic_t ref_count;
+ refcount_t ref_count;
};

struct bnxt_en_dev {
--
2.20.1
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