linux-kernel - [PATCH] net/core: tidy up an error message

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Message-Id: <20181201045153.4035-1-cai@gmx.us>
Date:   Fri, 30 Nov 2018 23:51:53 -0500
From:   Qian Cai <cai@....us>
To:     davem@...emloft.net
Cc:     yisen.zhuang@...wei.com, salil.mehta@...wei.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Qian Cai <cai@....us>
Subject: [PATCH] net/core: tidy up an error message

netif_napi_add() could report an error like this below due to it allows
to pass a format string for wildcarding before calling
dev_get_valid_name(),

"netif_napi_add() called with weight 256 on device eth%d"

For example, hns_enet_drv module does this.

hns_nic_try_get_ae
  hns_nic_init_ring_data
    netif_napi_add
  register_netdev
    dev_get_valid_name

Hence, make it a bit more human-readable.

Signed-off-by: Qian Cai <cai@....us>
---
 net/core/dev.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index ddc551f24ba2..bbd7cdbbbebd 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -6205,7 +6205,8 @@ void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
 	napi->poll = poll;
 	if (weight > NAPI_POLL_WEIGHT)
 		pr_err_once("netif_napi_add() called with weight %d on device %s\n",
-			    weight, dev->name);
+			    weight,
+			    !strchr(dev->name, '%') ? dev->name : "unknown");
 	napi->weight = weight;
 	list_add(&napi->dev_list, &dev->napi_list);
 	napi->dev = dev;
-- 
2.17.2 (Apple Git-113)