diff options
Diffstat (limited to 'drivers/net/ethernet/netronome')
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/nfp_net_common.c | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c index bde9695b9f8a..60f2da438990 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c @@ -137,20 +137,37 @@ static bool nfp_net_reconfig_check_done(struct nfp_net *nn, bool last_check) return false; } -static int nfp_net_reconfig_wait(struct nfp_net *nn, unsigned long deadline) +static bool __nfp_net_reconfig_wait(struct nfp_net *nn, unsigned long deadline) { bool timed_out = false; + int i; + + /* Poll update field, waiting for NFP to ack the config. + * Do an opportunistic wait-busy loop, afterward sleep. + */ + for (i = 0; i < 50; i++) { + if (nfp_net_reconfig_check_done(nn, false)) + return false; + udelay(4); + } - /* Poll update field, waiting for NFP to ack the config */ while (!nfp_net_reconfig_check_done(nn, timed_out)) { - msleep(1); + usleep_range(250, 500); timed_out = time_is_before_eq_jiffies(deadline); } + return timed_out; +} + +static int nfp_net_reconfig_wait(struct nfp_net *nn, unsigned long deadline) +{ + if (__nfp_net_reconfig_wait(nn, deadline)) + return -EIO; + if (nn_readl(nn, NFP_NET_CFG_UPDATE) & NFP_NET_CFG_UPDATE_ERR) return -EIO; - return timed_out ? -EIO : 0; + return 0; } static void nfp_net_reconfig_timer(struct timer_list *t) |