cnic: Disable statistics initialization for eth clients that do not support statistics

Disable statistics initialization for eth clients that do not support
 statistics. This prevents memory corruption on bnx2x hw.

Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>

diff --git a/drivers/net/cnic.c b/drivers/net/cnic.c
index fe925663d39a535a5c9d2c6f65866c3f2f29e6d7..80471269977adefdaae7e0a7845611a2e1e7cadc 100644 (file)
--- a/drivers/net/cnic.c
+++ b/drivers/net/cnic.c
@@ -3919,8 +3919,9 @@ static void cnic_init_bnx2x_tx_ring(struct cnic_dev *dev)
                HC_INDEX_DEF_C_ETH_ISCSI_CQ_CONS;
        context->cstorm_st_context.status_block_id = BNX2X_DEF_SB_ID;
 
-       context->xstorm_st_context.statistics_data = (cli |
-                               XSTORM_ETH_ST_CONTEXT_STATISTICS_ENABLE);
+       if (cli < MAX_X_STAT_COUNTER_ID)
+               context->xstorm_st_context.statistics_data = cli |
+                               XSTORM_ETH_ST_CONTEXT_STATISTICS_ENABLE;
 
        context->xstorm_ag_context.cdu_reserved =
                CDU_RSRVD_VALUE_TYPE_A(BNX2X_HW_CID(BNX2X_ISCSI_L2_CID, func),
@@ -3928,10 +3929,12 @@ static void cnic_init_bnx2x_tx_ring(struct cnic_dev *dev)
                                        ETH_CONNECTION_TYPE);
 
        /* reset xstorm per client statistics */
-       val = BAR_XSTRORM_INTMEM +
-             XSTORM_PER_COUNTER_ID_STATS_OFFSET(port, cli);
-       for (i = 0; i < sizeof(struct xstorm_per_client_stats) / 4; i++)
-               CNIC_WR(dev, val + i * 4, 0);
+       if (cli < MAX_X_STAT_COUNTER_ID) {
+               val = BAR_XSTRORM_INTMEM +
+                     XSTORM_PER_COUNTER_ID_STATS_OFFSET(port, cli);
+               for (i = 0; i < sizeof(struct xstorm_per_client_stats) / 4; i++)
+                       CNIC_WR(dev, val + i * 4, 0);
+       }
 
        cp->tx_cons_ptr =
                &cp->bnx2x_def_status_blk->c_def_status_block.index_values[
@@ -3978,9 +3981,11 @@ static void cnic_init_bnx2x_rx_ring(struct cnic_dev *dev)
                                                BNX2X_ISCSI_RX_SB_INDEX_NUM;
        context->ustorm_st_context.common.clientId = cli;
        context->ustorm_st_context.common.status_block_id = BNX2X_DEF_SB_ID;
-       context->ustorm_st_context.common.flags =
-               USTORM_ETH_ST_CONTEXT_CONFIG_ENABLE_STATISTICS;
-       context->ustorm_st_context.common.statistics_counter_id = cli;
+       if (cli < MAX_U_STAT_COUNTER_ID) {
+               context->ustorm_st_context.common.flags =
+                       USTORM_ETH_ST_CONTEXT_CONFIG_ENABLE_STATISTICS;
+               context->ustorm_st_context.common.statistics_counter_id = cli;
+       }
        context->ustorm_st_context.common.mc_alignment_log_size = 0;
        context->ustorm_st_context.common.bd_buff_size =
                                                cp->l2_single_buf_size;
@@ -4011,10 +4016,13 @@ static void cnic_init_bnx2x_rx_ring(struct cnic_dev *dev)
 
        /* client tstorm info */
        tstorm_client.mtu = cp->l2_single_buf_size - 14;
-       tstorm_client.config_flags =
-                       (TSTORM_ETH_CLIENT_CONFIG_E1HOV_REM_ENABLE |
-                       TSTORM_ETH_CLIENT_CONFIG_STATSITICS_ENABLE);
-       tstorm_client.statistics_counter_id = cli;
+       tstorm_client.config_flags = TSTORM_ETH_CLIENT_CONFIG_E1HOV_REM_ENABLE;
+
+       if (cli < MAX_T_STAT_COUNTER_ID) {
+               tstorm_client.config_flags |=
+                               TSTORM_ETH_CLIENT_CONFIG_STATSITICS_ENABLE;
+               tstorm_client.statistics_counter_id = cli;
+       }
 
        CNIC_WR(dev, BAR_TSTRORM_INTMEM +
                   TSTORM_CLIENT_CONFIG_OFFSET(port, cli),
@@ -4024,16 +4032,21 @@ static void cnic_init_bnx2x_rx_ring(struct cnic_dev *dev)
                   ((u32 *)&tstorm_client)[1]);
 
        /* reset tstorm per client statistics */
-       val = BAR_TSTRORM_INTMEM +
-             TSTORM_PER_COUNTER_ID_STATS_OFFSET(port, cli);
-       for (i = 0; i < sizeof(struct tstorm_per_client_stats) / 4; i++)
-               CNIC_WR(dev, val + i * 4, 0);
+       if (cli < MAX_T_STAT_COUNTER_ID) {
+
+               val = BAR_TSTRORM_INTMEM +
+                     TSTORM_PER_COUNTER_ID_STATS_OFFSET(port, cli);
+               for (i = 0; i < sizeof(struct tstorm_per_client_stats) / 4; i++)
+                       CNIC_WR(dev, val + i * 4, 0);
+       }
 
        /* reset ustorm per client statistics */
-       val = BAR_USTRORM_INTMEM +
-             USTORM_PER_COUNTER_ID_STATS_OFFSET(port, cli);
-       for (i = 0; i < sizeof(struct ustorm_per_client_stats) / 4; i++)
-               CNIC_WR(dev, val + i * 4, 0);
+       if (cli < MAX_U_STAT_COUNTER_ID) {
+               val = BAR_USTRORM_INTMEM +
+                     USTORM_PER_COUNTER_ID_STATS_OFFSET(port, cli);
+               for (i = 0; i < sizeof(struct ustorm_per_client_stats) / 4; i++)
+                       CNIC_WR(dev, val + i * 4, 0);
+       }
 
        cp->rx_cons_ptr =
                &cp->bnx2x_def_status_blk->u_def_status_block.index_values[