[PATCH net-next v2] bonding: Added -ENODEV interpret for slaves option

When the incorrect interface name is stored in the slaves/active_slave
option of the bonding sysfs, the kernel does not record the log that
interface does not exist.

This patch adds a log for -ENODEV error, which will facilitate users to
figure out such issue.

Signed-off-by: Jianlin Lv <redacted>
---
v2: Update changlog.
---
 drivers/net/bonding/bond_options.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/net/bonding/bond_options.c b/drivers/net/bonding/bond_options.c
index 77d7c38bd435..c9d3604ae129 100644
--- a/drivers/net/bonding/bond_options.c
+++ b/drivers/net/bonding/bond_options.c

@@ -640,6 +640,15 @@ static void bond_opt_error_interpret(struct bonding *bond,
 		netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
 			   opt->name);
 		break;
+	case -ENODEV:
+		if (val && val->string) {
+			p = strchr(val->string, '\n');
+			if (p)
+				*p = '\0';
+			netdev_err(bond->dev, "option %s: interface %s does not exist!\n",
+				   opt->name, val->string);
+		}
+		break;
 	default:
 		break;
 	}

-- 
2.25.1

Hello:

This patch was applied to netdev/net-next.git (refs/heads/master):

On Sun, 14 Mar 2021 22:56:29 +0800 you wrote:

When the incorrect interface name is stored in the slaves/active_slave
option of the bonding sysfs, the kernel does not record the log that
interface does not exist.

This patch adds a log for -ENODEV error, which will facilitate users to
figure out such issue.

[...]

Here is the summary with links:
  - [net-next,v2] bonding: Added -ENODEV interpret for slaves option
    https://git.kernel.org/netdev/net-next/c/acdff0df5426

You are awesome, thank you!
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