Merge remote-tracking branches 'asoc/topic/davinci', 'asoc/topic/drm', 'asoc/topic...

[sfrench/cifs-2.6.git] / drivers / net / ethernet / mellanox / mlx5 / core / en_rx_am.c

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rx_am.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rx_am.c
index 54cdda957f9a4bf083632739ebe849ef9fd112d1..acf32fe952cdef6f994e2937433ac4b1b7962e84 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx_am.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx_am.c
@@ -270,6 +270,8 @@ static void mlx5e_am_sample(struct mlx5e_rq *rq,
 }
 
 #define MLX5E_AM_NEVENTS 64
+#define BITS_PER_TYPE(type) (sizeof(type) * BITS_PER_BYTE)
+#define BIT_GAP(bits, end, start) ((((end) - (start)) + BIT_ULL(bits)) & (BIT_ULL(bits) - 1))
 
 static void mlx5e_am_calc_stats(struct mlx5e_rx_am_sample *start,
                                struct mlx5e_rx_am_sample *end,
@@ -277,8 +279,9 @@ static void mlx5e_am_calc_stats(struct mlx5e_rx_am_sample *start,
 {
        /* u32 holds up to 71 minutes, should be enough */
        u32 delta_us = ktime_us_delta(end->time, start->time);
-       unsigned int npkts = end->pkt_ctr - start->pkt_ctr;
-       unsigned int nbytes = end->byte_ctr - start->byte_ctr;
+       u32 npkts = BIT_GAP(BITS_PER_TYPE(u32), end->pkt_ctr, start->pkt_ctr);
+       u32 nbytes = BIT_GAP(BITS_PER_TYPE(u32), end->byte_ctr,
+                            start->byte_ctr);
 
        if (!delta_us)
                return;
@@ -311,7 +314,8 @@ void mlx5e_rx_am(struct mlx5e_rq *rq)
 
        switch (am->state) {
        case MLX5E_AM_MEASURE_IN_PROGRESS:
-               nevents = rq->cq.event_ctr - am->start_sample.event_ctr;
+               nevents = BIT_GAP(BITS_PER_TYPE(u16), rq->cq.event_ctr,
+                                 am->start_sample.event_ctr);
                if (nevents < MLX5E_AM_NEVENTS)
                        break;
                mlx5e_am_sample(rq, &end_sample);