Patchwork [07/16] batman-adv: Remove extra check in batadv_bit_get_packet

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Submitter Antonio Quartulli
Date Oct. 28, 2012, 11:17 a.m.
Message ID <1351423037-5292-8-git-send-email-ordex@autistici.org>
Download mbox | patch
Permalink /patch/194679/
State Changes Requested
Delegated to: David Miller
Headers show

Comments

Antonio Quartulli - Oct. 28, 2012, 11:17 a.m.
From: Sven Eckelmann <sven@narfation.org>

batadv_bit_get_packet checks for all common situations before it decides that
the new received packet indicates that the host was restarted. This extra
condition check at the end of the function is not necessary because this
condition is always true.

This patch addresses Coverity #712296: Logically dead code

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
---
 net/batman-adv/bitarray.c | 23 ++++++++++-------------
 1 file changed, 10 insertions(+), 13 deletions(-)

Patch

diff --git a/net/batman-adv/bitarray.c b/net/batman-adv/bitarray.c
index aea174c..5453b17 100644
--- a/net/batman-adv/bitarray.c
+++ b/net/batman-adv/bitarray.c
@@ -79,20 +79,17 @@  int batadv_bit_get_packet(void *priv, unsigned long *seq_bits,
 	 * or the old packet got delayed somewhere in the network. The
 	 * packet should be dropped without calling this function if the
 	 * seqno window is protected.
+	 *
+	 * seq_num_diff <= -BATADV_TQ_LOCAL_WINDOW_SIZE
+	 * or
+	 * seq_num_diff >= BATADV_EXPECTED_SEQNO_RANGE
 	 */
-	if (seq_num_diff <= -BATADV_TQ_LOCAL_WINDOW_SIZE ||
-	    seq_num_diff >= BATADV_EXPECTED_SEQNO_RANGE) {
+	batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
+		   "Other host probably restarted!\n");
 
-		batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
-			   "Other host probably restarted!\n");
+	bitmap_zero(seq_bits, BATADV_TQ_LOCAL_WINDOW_SIZE);
+	if (set_mark)
+		batadv_set_bit(seq_bits, 0);
 
-		bitmap_zero(seq_bits, BATADV_TQ_LOCAL_WINDOW_SIZE);
-		if (set_mark)
-			batadv_set_bit(seq_bits, 0);
-
-		return 1;
-	}
-
-	/* never reached */
-	return 0;
+	return 1;
 }