diff options
| author |   Luo bin <luobin9@huawei.com> | 2020-03-20 23:13:18 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2020-03-21 19:43:38 -0700 |
| commit | 33f15da216a1f4566b4ec880942556ace30615df (patch) | |
| tree | d5404ae2b8b6dfbfbec4c83b47076b66f6b5b356 /drivers/net/ethernet/huawei/hinic/hinic_tx.c | |
| parent | hinic: fix the bug of clearing event queue (diff) | |
| download | wireguard-linux-33f15da216a1f4566b4ec880942556ace30615df.tar.xz wireguard-linux-33f15da216a1f4566b4ec880942556ace30615df.zip | |
hinic: fix out-of-order excution in arm cpu
add read barrier in driver code to keep from reading other fileds
in dma memory which is writable for hw until we have verified the
memory is valid for driver
Signed-off-by: Luo bin <luobin9@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | drivers/net/ethernet/huawei/hinic/hinic_tx.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/ethernet/huawei/hinic/hinic_tx.c b/drivers/net/ethernet/huawei/hinic/hinic_tx.c index 0e13d1c7e474..375d81d03e86 100644 --- a/drivers/net/ethernet/huawei/hinic/hinic_tx.c +++ b/drivers/net/ethernet/huawei/hinic/hinic_tx.c @@ -622,6 +622,8 @@ static int free_tx_poll(struct napi_struct *napi, int budget) do { hw_ci = HW_CONS_IDX(sq) & wq->mask; + dma_rmb(); + /* Reading a WQEBB to get real WQE size and consumer index. */ sq_wqe = hinic_sq_read_wqebb(sq, &skb, &wqe_size, &sw_ci); if ((!sq_wqe) || |