diff options
Diffstat (limited to 'drivers/net/sfc/mcdi.c')
| -rw-r--r-- | drivers/net/sfc/mcdi.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/net/sfc/mcdi.c b/drivers/net/sfc/mcdi.c index 8bba8955f31..5e118f0d247 100644 --- a/drivers/net/sfc/mcdi.c +++ b/drivers/net/sfc/mcdi.c @@ -94,14 +94,15 @@ static void efx_mcdi_copyin(struct efx_nic *efx, unsigned cmd, efx_writed(efx, &hdr, pdu); - for (i = 0; i < inlen; i += 4) + for (i = 0; i < inlen; i += 4) { _efx_writed(efx, *((__le32 *)(inbuf + i)), pdu + 4 + i); - - /* Ensure the payload is written out before the header */ - wmb(); + /* use wmb() within loop to inhibit write combining */ + wmb(); + } /* ring the doorbell with a distinctive value */ _efx_writed(efx, (__force __le32) 0x45789abc, doorbell); + wmb(); } static void efx_mcdi_copyout(struct efx_nic *efx, u8 *outbuf, size_t outlen) |