From 97fcc193f67e584dc6564767c6e186fe1ecd71d2 Mon Sep 17 00:00:00 2001 From: Gao Feng Date: Thu, 1 Jun 2017 17:58:39 +0800 Subject: [PATCH] ppp: remove unnecessary bh disable in xmit path Since the commit 55454a565836 ("ppp: avoid dealock on recursive xmit"), the PPP xmit path is protected by wrapper functions which disable the bh already. So it is unnecessary to disable the bh again in the real xmit path. Signed-off-by: Gao Feng Acked-by: Guillaume Nault Signed-off-by: David S. Miller --- drivers/net/ppp/ppp_generic.c | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-) diff --git a/drivers/net/ppp/ppp_generic.c b/drivers/net/ppp/ppp_generic.c index f9c0e62716ea..bbded33120fe 100644 --- a/drivers/net/ppp/ppp_generic.c +++ b/drivers/net/ppp/ppp_generic.c @@ -1618,7 +1618,7 @@ ppp_push(struct ppp *ppp) list = list->next; pch = list_entry(list, struct channel, clist); - spin_lock_bh(&pch->downl); + spin_lock(&pch->downl); if (pch->chan) { if (pch->chan->ops->start_xmit(pch->chan, skb)) ppp->xmit_pending = NULL; @@ -1627,7 +1627,7 @@ ppp_push(struct ppp *ppp) kfree_skb(skb); ppp->xmit_pending = NULL; } - spin_unlock_bh(&pch->downl); + spin_unlock(&pch->downl); return; } @@ -1757,7 +1757,7 @@ static int ppp_mp_explode(struct ppp *ppp, struct sk_buff *skb) } /* check the channel's mtu and whether it is still attached. */ - spin_lock_bh(&pch->downl); + spin_lock(&pch->downl); if (pch->chan == NULL) { /* can't use this channel, it's being deregistered */ if (pch->speed == 0) @@ -1765,7 +1765,7 @@ static int ppp_mp_explode(struct ppp *ppp, struct sk_buff *skb) else totspeed -= pch->speed; - spin_unlock_bh(&pch->downl); + spin_unlock(&pch->downl); pch->avail = 0; totlen = len; totfree--; @@ -1816,7 +1816,7 @@ static int ppp_mp_explode(struct ppp *ppp, struct sk_buff *skb) */ if (flen <= 0) { pch->avail = 2; - spin_unlock_bh(&pch->downl); + spin_unlock(&pch->downl); continue; } @@ -1861,14 +1861,14 @@ static int ppp_mp_explode(struct ppp *ppp, struct sk_buff *skb) len -= flen; ++ppp->nxseq; bits = 0; - spin_unlock_bh(&pch->downl); + spin_unlock(&pch->downl); } ppp->nxchan = i; return 1; noskb: - spin_unlock_bh(&pch->downl); + spin_unlock(&pch->downl); if (ppp->debug & 1) netdev_err(ppp->dev, "PPP: no memory (fragment)\n"); ++ppp->dev->stats.tx_errors; @@ -1883,7 +1883,7 @@ static void __ppp_channel_push(struct channel *pch) struct sk_buff *skb; struct ppp *ppp; - spin_lock_bh(&pch->downl); + spin_lock(&pch->downl); if (pch->chan) { while (!skb_queue_empty(&pch->file.xq)) { skb = skb_dequeue(&pch->file.xq); @@ -1897,14 +1897,14 @@ static void __ppp_channel_push(struct channel *pch) /* channel got deregistered */ skb_queue_purge(&pch->file.xq); } - spin_unlock_bh(&pch->downl); + spin_unlock(&pch->downl); /* see if there is anything from the attached unit to be sent */ if (skb_queue_empty(&pch->file.xq)) { - read_lock_bh(&pch->upl); + read_lock(&pch->upl); ppp = pch->ppp; if (ppp) __ppp_xmit_process(ppp); - read_unlock_bh(&pch->upl); + read_unlock(&pch->upl); } } -- GitLab