From a817ead4154d86c74bf98936f3a385e8a21974ff Mon Sep 17 00:00:00 2001 From: Maciej Fijalkowski Date: Wed, 13 Apr 2022 17:30:13 +0200 Subject: [PATCH] stmmac, xsk: Diversify return values from xsk_wakeup call paths Currently, when debugging AF_XDP workloads, one can correlate the -ENXIO return code as the case that XSK is not in the bound state. Returning same code from ndo_xsk_wakeup can be misleading and simply makes it harder to follow what is going on. Change ENXIOs in stmmac's ndo_xsk_wakeup() implementation to EINVALs, so that when probing it is clear that something is wrong on the driver side, not the xsk_{recv,send}msg. There is a -ENETDOWN that can happen from both kernel/driver sides though, but I don't have a correct replacement for this on one of the sides, so let's keep it that way. Signed-off-by: Maciej Fijalkowski Signed-off-by: Daniel Borkmann Link: https://lore.kernel.org/bpf/20220413153015.453864-13-maciej.fijalkowski@intel.com --- drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index 4a4b3651ab3e2..c9e077b2a56e3 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -6565,7 +6565,7 @@ int stmmac_xsk_wakeup(struct net_device *dev, u32 queue, u32 flags) return -ENETDOWN; if (!stmmac_xdp_is_enabled(priv)) - return -ENXIO; + return -EINVAL; if (queue >= priv->plat->rx_queues_to_use || queue >= priv->plat->tx_queues_to_use) @@ -6576,7 +6576,7 @@ int stmmac_xsk_wakeup(struct net_device *dev, u32 queue, u32 flags) ch = &priv->channel[queue]; if (!rx_q->xsk_pool && !tx_q->xsk_pool) - return -ENXIO; + return -EINVAL; if (!napi_if_scheduled_mark_missed(&ch->rxtx_napi)) { /* EQoS does not have per-DMA channel SW interrupt, -- 2.30.2