[PATCH 3/3] staging: octeon: match exact interface names in pow_send_list

[Oscar Alejandro Sánchez Lucero via B4 Relay]

From: Oscar Alejandro Sánchez Lucero <aleszlucero@xxxxxxxxx>

cvm_oct_common_init() checks whether dev->name is present in the
comma-separated pow_send_list module parameter using strstr(). This
causes false positives when one interface name is a prefix of another
(for example, matching "eth1" when pow_send_list contains "eth10").

Copy pow_send_list to a temporary buffer, tokenize it with strsep(),
and compare each comma-separated entry with strcmp().

Signed-off-by: Oscar Alejandro Sánchez Lucero <aleszlucero@xxxxxxxxx>
---
 drivers/staging/octeon/ethernet.c | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/octeon/ethernet.c b/drivers/staging/octeon/ethernet.c
index 8f9dd87752d7..1e3cf56deec4 100644
--- a/drivers/staging/octeon/ethernet.c
+++ b/drivers/staging/octeon/ethernet.c
@@ -432,9 +432,23 @@ int cvm_oct_common_init(struct net_device *dev)
 	 * Force the interface to use the POW send if always_use_pow
 	 * was specified or it is in the pow send list.
 	 */
-	if ((pow_send_group != -1) &&
-	    (always_use_pow || strstr(pow_send_list, dev->name)))
-		priv->queue = -1;
+	if (pow_send_group != -1) {
+		if (always_use_pow) {
+			priv->queue = -1;
+		} else if (pow_send_list[0]) {
+			char list[sizeof(pow_send_list)];
+			char *p = list;
+			char *token;
+
+			strscpy(list, pow_send_list, sizeof(list));
+			while ((token = strsep(&p, ",")) != NULL) {
+				if (!strcmp(token, dev->name)) {
+					priv->queue = -1;
+					break;
+				}
+			}
+		}
+	}
 
 	if (priv->queue != -1)
 		dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM;

-- 
2.56.0