From f3aa3136d9c15ff693198eb34701a74bb0b6b969 Mon Sep 17 00:00:00 2001 From: Sachin Sant Date: Fri, 26 Nov 2010 02:41:17 +0000 Subject: [PATCH] qeth lcs: convert mc rwlock to RCU Commit 1d7138de878d1d4210727c1200193e69596f93b3 igmp: RCU conversion of in_dev->mc_list converted rwlock to RCU. Update the s390 network drivers(qeth & lcs) code to adapt to this change. V2 : Changes based on suggestions given by Eric Dumazet Signed-off-by: Sachin Sant Signed-off-by: Ursula Braun Signed-off-by: Frank Blaschka Signed-off-by: David S. Miller --- drivers/s390/net/lcs.c | 10 ++++++---- drivers/s390/net/qeth_l3_main.c | 11 ++++++----- 2 files changed, 12 insertions(+), 9 deletions(-) diff --git a/drivers/s390/net/lcs.c b/drivers/s390/net/lcs.c index 0f19d540b655..c9f13b9ea339 100644 --- a/drivers/s390/net/lcs.c +++ b/drivers/s390/net/lcs.c @@ -1188,7 +1188,8 @@ lcs_remove_mc_addresses(struct lcs_card *card, struct in_device *in4_dev) spin_lock_irqsave(&card->ipm_lock, flags); list_for_each(l, &card->ipm_list) { ipm = list_entry(l, struct lcs_ipm_list, list); - for (im4 = in4_dev->mc_list; im4 != NULL; im4 = im4->next) { + for (im4 = rcu_dereference(in4_dev->mc_list); + im4 != NULL; im4 = rcu_dereference(im4->next_rcu)) { lcs_get_mac_for_ipm(im4->multiaddr, buf, card->dev); if ( (ipm->ipm.ip_addr == im4->multiaddr) && (memcmp(buf, &ipm->ipm.mac_addr, @@ -1233,7 +1234,8 @@ lcs_set_mc_addresses(struct lcs_card *card, struct in_device *in4_dev) unsigned long flags; LCS_DBF_TEXT(4, trace, "setmclst"); - for (im4 = in4_dev->mc_list; im4; im4 = im4->next) { + for (im4 = rcu_dereference(in4_dev->mc_list); im4 != NULL; + im4 = rcu_dereference(im4->next_rcu)) { lcs_get_mac_for_ipm(im4->multiaddr, buf, card->dev); ipm = lcs_check_addr_entry(card, im4, buf); if (ipm != NULL) @@ -1269,10 +1271,10 @@ lcs_register_mc_addresses(void *data) in4_dev = in_dev_get(card->dev); if (in4_dev == NULL) goto out; - read_lock(&in4_dev->mc_list_lock); + rcu_read_lock(); lcs_remove_mc_addresses(card,in4_dev); lcs_set_mc_addresses(card, in4_dev); - read_unlock(&in4_dev->mc_list_lock); + rcu_read_unlock(); in_dev_put(in4_dev); netif_carrier_off(card->dev); diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c index 74d1401a5d5e..65291db324f5 100644 --- a/drivers/s390/net/qeth_l3_main.c +++ b/drivers/s390/net/qeth_l3_main.c @@ -1796,7 +1796,8 @@ static void qeth_l3_add_mc(struct qeth_card *card, struct in_device *in4_dev) char buf[MAX_ADDR_LEN]; QETH_CARD_TEXT(card, 4, "addmc"); - for (im4 = in4_dev->mc_list; im4; im4 = im4->next) { + for (im4 = rcu_dereference(in4_dev->mc_list); im4 != NULL; + im4 = rcu_dereference(im4->next_rcu)) { qeth_l3_get_mac_for_ipm(im4->multiaddr, buf, in4_dev->dev); ipm = qeth_l3_get_addr_buffer(QETH_PROT_IPV4); if (!ipm) @@ -1828,9 +1829,9 @@ static void qeth_l3_add_vlan_mc(struct qeth_card *card) in_dev = in_dev_get(netdev); if (!in_dev) continue; - read_lock(&in_dev->mc_list_lock); + rcu_read_lock(); qeth_l3_add_mc(card, in_dev); - read_unlock(&in_dev->mc_list_lock); + rcu_read_unlock(); in_dev_put(in_dev); } } @@ -1843,10 +1844,10 @@ static void qeth_l3_add_multicast_ipv4(struct qeth_card *card) in4_dev = in_dev_get(card->dev); if (in4_dev == NULL) return; - read_lock(&in4_dev->mc_list_lock); + rcu_read_lock(); qeth_l3_add_mc(card, in4_dev); qeth_l3_add_vlan_mc(card); - read_unlock(&in4_dev->mc_list_lock); + rcu_read_unlock(); in_dev_put(in4_dev); } -- 2.20.1