From: Michael Chan Date: Thu, 5 Nov 2015 21:25:50 +0000 (-0500) Subject: bnxt_en: Fix comparison of u16 sw_id against negative value. X-Git-Tag: v4.4-rc1~45^2~19^2~1 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=84e86b98f6515aaeaac053b234be158b25457184;p=karo-tx-linux.git bnxt_en: Fix comparison of u16 sw_id against negative value. Assign the return value from bitmap_find_free_region() to an integer variable and check for negative error codes first, before assigning the bit ID to the unsigned sw_id field. Reported-by: Dan Carpenter Cc: Dan Carpenter Signed-off-by: Michael Chan Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c index a62deff5a4ac..db15c5ee09c5 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -5307,7 +5307,7 @@ static int bnxt_rx_flow_steer(struct net_device *dev, const struct sk_buff *skb, struct bnxt_ntuple_filter *fltr, *new_fltr; struct flow_keys *fkeys; struct ethhdr *eth = (struct ethhdr *)skb_mac_header(skb); - int rc = 0, idx; + int rc = 0, idx, bit_id; struct hlist_head *head; if (skb->encapsulation) @@ -5345,14 +5345,15 @@ static int bnxt_rx_flow_steer(struct net_device *dev, const struct sk_buff *skb, rcu_read_unlock(); spin_lock_bh(&bp->ntp_fltr_lock); - new_fltr->sw_id = bitmap_find_free_region(bp->ntp_fltr_bmap, - BNXT_NTP_FLTR_MAX_FLTR, 0); - if (new_fltr->sw_id < 0) { + bit_id = bitmap_find_free_region(bp->ntp_fltr_bmap, + BNXT_NTP_FLTR_MAX_FLTR, 0); + if (bit_id < 0) { spin_unlock_bh(&bp->ntp_fltr_lock); rc = -ENOMEM; goto err_free; } + new_fltr->sw_id = (u16)bit_id; new_fltr->flow_id = flow_id; new_fltr->rxq = rxq_index; hlist_add_head_rcu(&new_fltr->hash, head);