netdev - [PATCH 2/2] dsa: make dsa_switch_setup check for valid port names

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Date:	Mon, 21 Jan 2013 20:58:51 +0100
From:	Florian Fainelli <florian@...nwrt.org>
To:	netdev@...r.kernel.org
Cc:	buytenh@...tstofly.org, konszert@...vell.com, davem@...emloft.net,
	Florian Fainelli <florian@...nwrt.org>
Subject: [PATCH 2/2] dsa: make dsa_switch_setup check for valid port names

This patch changes dsa_switch_setup() to ensure that at least one valid
valid port name is specified and will bail out with an error in case we
walked the maximum number of port with a valid port name found.

Signed-off-by: Florian Fainelli <florian@...nwrt.org>
---
 net/dsa/dsa.c |    6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index 45295ca..2bc62ea 100644
--- a/net/dsa/dsa.c
+++ b/net/dsa/dsa.c
@@ -80,6 +80,7 @@ dsa_switch_setup(struct dsa_switch_tree *dst, int index,
 	int ret;
 	char *name;
 	int i;
+	bool valid_name_found = false;
 
 	/*
 	 * Probe for switch model.
@@ -131,8 +132,13 @@ dsa_switch_setup(struct dsa_switch_tree *dst, int index,
 		} else {
 			ds->phys_port_mask |= 1 << i;
 		}
+		valid_name_found = true;
 	}
 
+	if (!valid_name_found && i == DSA_MAX_PORTS) {
+		ret = -EINVAL;
+		goto out;
+	}
 
 	/*
 	 * If the CPU connects to this switch, set the switch tree
-- 
1.7.10.4

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