Subject: [patch] iwlwifi: testing the wrong variable

From: Dan Carpenter <[email-masked]>
Date: Thu, 18 Feb 2010 12:45:29 +0300

The first one fixes a smatch false positive and the second one fixes
a potential bug.

drivers/net/wireless/iwlwifi/iwl-5000.c +786 iwl5000_txq_update_byte_cnt_tbl(37) error: buffer overflow 
'(scd_bc_tbl+txq_id)->tfd_offset' 320 <= 512
drivers/net/wireless/iwlwifi/iwl-5000.c +808 iwl5000_txq_inval_byte_cnt_tbl(19) error: buffer overflow 
'(scd_bc_tbl+txq_id)->tfd_offset' 320 <= 512

Signed-off-by: Dan Carpenter <[email-masked]>
Cc: [email-masked]
---
I don't have the hardware to test this change.

diff --git a/drivers/net/wireless/iwlwifi/iwl-5000.c b/drivers/net/wireless/iwlwifi/iwl-5000.c
index de45f30..b45150d 100644
--- a/drivers/net/wireless/iwlwifi/iwl-5000.c
+++ b/drivers/net/wireless/iwlwifi/iwl-5000.c
@@ -781,7 +781,7 @@ void iwl5000_txq_update_byte_cnt_tbl(struct iwl_priv *priv,
 
 	scd_bc_tbl[txq_id].tfd_offset[write_ptr] = bc_ent;
 
-	if (txq->q.write_ptr < TFD_QUEUE_SIZE_BC_DUP)
+	if (write_ptr < TFD_QUEUE_SIZE_BC_DUP)
 		scd_bc_tbl[txq_id].
 			tfd_offset[TFD_QUEUE_SIZE_MAX + write_ptr] = bc_ent;
 }
@@ -803,7 +803,7 @@ void iwl5000_txq_inval_byte_cnt_tbl(struct iwl_priv *priv,
 	bc_ent =  cpu_to_le16(1 | (sta_id << 12));
 	scd_bc_tbl[txq_id].tfd_offset[read_ptr] = bc_ent;
 
-	if (txq->q.write_ptr < TFD_QUEUE_SIZE_BC_DUP)
+	if (read_ptr < TFD_QUEUE_SIZE_BC_DUP)
 		scd_bc_tbl[txq_id].
 			tfd_offset[TFD_QUEUE_SIZE_MAX + read_ptr] =  bc_ent;
 }