openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

bnxt_en: Check for NULL rx or tx ring. 

Each bnxt_napi structure may no longer be having both an rx ring and
a tx ring.  Check for a valid ring before using it.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michael Chan 2016-01-02 23:45:00 -05:00 committed by David S. Miller
parent b6ab4b01f5
commit 3b2b7d9db7
1 changed files with 22 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
drivers/net/ethernet/broadcom/bnxt/bnxt.c
View File

@ -1867,6 +1867,9 @@ static void bnxt_init_ring_struct(struct bnxt *bp)
ring->vmem_size = 0;
rxr = bnapi->rx_ring;
if (!rxr)
goto skip_rx;
ring = &rxr->rx_ring_struct;
ring->nr_pages = bp->rx_nr_pages;
ring->page_size = HW_RXBD_RING_SIZE;
@ -1883,7 +1886,11 @@ static void bnxt_init_ring_struct(struct bnxt *bp)
ring->vmem_size = SW_RXBD_AGG_RING_SIZE * bp->rx_agg_nr_pages;
ring->vmem = (void **)&rxr->rx_agg_ring;
skip_rx:
txr = bnapi->tx_ring;
if (!txr)
continue;
ring = &txr->tx_ring_struct;
ring->nr_pages = bp->tx_nr_pages;
ring->page_size = HW_RXBD_RING_SIZE;
@ -2400,13 +2407,17 @@ static void bnxt_clear_ring_indices(struct bnxt *bp)
cpr->cp_raw_cons = 0;
txr = bnapi->tx_ring;
txr->tx_prod = 0;
txr->tx_cons = 0;
if (txr) {
txr->tx_prod = 0;
txr->tx_cons = 0;
}
rxr = bnapi->rx_ring;
rxr->rx_prod = 0;
rxr->rx_agg_prod = 0;
rxr->rx_sw_agg_prod = 0;
if (rxr) {
rxr->rx_prod = 0;
rxr->rx_agg_prod = 0;
rxr->rx_sw_agg_prod = 0;
}
}
}
@ -4999,6 +5010,9 @@ static void bnxt_dump_tx_sw_state(struct bnxt_napi *bnapi)
struct bnxt_tx_ring_info *txr = bnapi->tx_ring;
int i = bnapi->index;
if (!txr)
return;
netdev_info(bnapi->bp->dev, "[%d]: tx{fw_ring: %d prod: %x cons: %x}\n",
i, txr->tx_ring_struct.fw_ring_id, txr->tx_prod,
txr->tx_cons);
@ -5009,6 +5023,9 @@ static void bnxt_dump_rx_sw_state(struct bnxt_napi *bnapi)
struct bnxt_rx_ring_info *rxr = bnapi->rx_ring;
int i = bnapi->index;
if (!rxr)
return;
netdev_info(bnapi->bp->dev, "[%d]: rx{fw_ring: %d prod: %x} rx_agg{fw_ring: %d agg_prod: %x sw_agg_prod: %x}\n",
i, rxr->rx_ring_struct.fw_ring_id, rxr->rx_prod,
rxr->rx_agg_ring_struct.fw_ring_id, rxr->rx_agg_prod,