be2net: Fix a bug in Rx buffer posting
The numPosted field in the ERX Doorbell register is 8-bits wide.
So the max buffers that we can post at a time is 255 and not 256
which we are doing currently.
Signed-off-by: Ajit Khaparde <ajit.khaparde@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/emulex/benet/be.h b/drivers/net/ethernet/emulex/benet/be.h
index 27b9fe9..204ec43 100644
--- a/drivers/net/ethernet/emulex/benet/be.h
+++ b/drivers/net/ethernet/emulex/benet/be.h
@@ -97,6 +97,7 @@
#define BE_NAPI_WEIGHT 64
#define MAX_RX_POST BE_NAPI_WEIGHT /* Frags posted at a time */
#define RX_FRAGS_REFILL_WM (RX_Q_LEN - MAX_RX_POST)
+#define MAX_NUM_POST_ERX_DB 255u
#define MAX_VFS 30 /* Max VFs supported by BE3 FW */
#define FW_VER_LEN 32
diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index e6b790f..ad2b509 100644
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -2032,7 +2032,7 @@
if (rxo->rx_post_starved)
rxo->rx_post_starved = false;
do {
- notify = min(256u, posted);
+ notify = min(MAX_NUM_POST_ERX_DB, posted);
be_rxq_notify(adapter, rxq->id, notify);
posted -= notify;
} while (posted);