From fe7c580073280c15bb4eb4f82bf20dddc1a68383 Mon Sep 17 00:00:00 2001 From: Samuel Ortiz Date: Tue, 15 May 2012 15:57:06 +0200 Subject: NFC: Add target mode protocols to the polling loop startup routine Signed-off-by: Samuel Ortiz --- net/nfc/netlink.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) (limited to 'net/nfc/netlink.c') diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c index 581d419083a..a18fd56798f 100644 --- a/net/nfc/netlink.c +++ b/net/nfc/netlink.c @@ -49,6 +49,8 @@ static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = { [NFC_ATTR_COMM_MODE] = { .type = NLA_U8 }, [NFC_ATTR_RF_MODE] = { .type = NLA_U8 }, [NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 }, + [NFC_ATTR_IM_PROTOCOLS] = { .type = NLA_U32 }, + [NFC_ATTR_TM_PROTOCOLS] = { .type = NLA_U32 }, }; static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target, @@ -519,16 +521,25 @@ static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info) struct nfc_dev *dev; int rc; u32 idx; - u32 protocols; + u32 im_protocols = 0, tm_protocols = 0; pr_debug("Poll start\n"); if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || - !info->attrs[NFC_ATTR_PROTOCOLS]) + ((!info->attrs[NFC_ATTR_IM_PROTOCOLS] && + !info->attrs[NFC_ATTR_PROTOCOLS]) && + !info->attrs[NFC_ATTR_TM_PROTOCOLS])) return -EINVAL; idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]); - protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]); + + if (info->attrs[NFC_ATTR_TM_PROTOCOLS]) + tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]); + else if (info->attrs[NFC_ATTR_PROTOCOLS]) + tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]); + + if (info->attrs[NFC_ATTR_IM_PROTOCOLS]) + im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]); dev = nfc_get_device(idx); if (!dev) @@ -536,7 +547,7 @@ static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info) mutex_lock(&dev->genl_data.genl_data_mutex); - rc = nfc_start_poll(dev, protocols); + rc = nfc_start_poll(dev, im_protocols, tm_protocols); if (!rc) dev->genl_data.poll_req_pid = info->snd_pid; -- cgit v1.2.3-70-g09d2 From fc40a8c1a06ab7db45da790693dd9802612a055c Mon Sep 17 00:00:00 2001 From: Samuel Ortiz Date: Fri, 1 Jun 2012 13:21:13 +0200 Subject: NFC: Add target mode activation netlink event Userspace gets a netlink event upon target mode activation. The LLCP layer is also signaled when we get an ATR_REQ in order to get the remote general bytes. Signed-off-by: Samuel Ortiz --- drivers/nfc/pn533.c | 27 ++++++++++++++++++++-- include/linux/nfc.h | 7 ++++++ include/net/nfc/nfc.h | 4 ++++ net/nfc/core.c | 35 +++++++++++++++++++++++++++++ net/nfc/netlink.c | 62 +++++++++++++++++++++++++++++++++++++++++++++++++++ net/nfc/nfc.h | 3 +++ 6 files changed, 136 insertions(+), 2 deletions(-) (limited to 'net/nfc/netlink.c') diff --git a/drivers/nfc/pn533.c b/drivers/nfc/pn533.c index 605a08a62e4..c6b9bc5ac6e 100644 --- a/drivers/nfc/pn533.c +++ b/drivers/nfc/pn533.c @@ -260,6 +260,10 @@ struct pn533_cmd_jump_dep_response { #define PN533_INIT_TARGET_PASSIVE 0x1 #define PN533_INIT_TARGET_DEP 0x2 +#define PN533_INIT_TARGET_RESP_FRAME_MASK 0x3 +#define PN533_INIT_TARGET_RESP_ACTIVE 0x1 +#define PN533_INIT_TARGET_RESP_DEP 0x4 + struct pn533_cmd_init_target { u8 mode; u8 mifare[6]; @@ -1128,10 +1132,13 @@ static int pn533_init_target_frame(struct pn533_frame *frame, return 0; } +#define ATR_REQ_GB_OFFSET 17 static int pn533_init_target_complete(struct pn533 *dev, void *arg, u8 *params, int params_len) { struct pn533_cmd_init_target_response *resp; + u8 frame, comm_mode = NFC_COMM_PASSIVE, *gb; + size_t gb_len; nfc_dev_dbg(&dev->interface->dev, "%s", __func__); @@ -1143,11 +1150,27 @@ static int pn533_init_target_complete(struct pn533 *dev, void *arg, return params_len; } + if (params_len < ATR_REQ_GB_OFFSET + 1) + return -EINVAL; + resp = (struct pn533_cmd_init_target_response *) params; - nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x\n", resp->mode); + nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x param len %d\n", + resp->mode, params_len); - return 0; + frame = resp->mode & PN533_INIT_TARGET_RESP_FRAME_MASK; + if (frame == PN533_INIT_TARGET_RESP_ACTIVE) + comm_mode = NFC_COMM_ACTIVE; + + /* Again, only DEP */ + if ((resp->mode & PN533_INIT_TARGET_RESP_DEP) == 0) + return -EOPNOTSUPP; + + gb = resp->cmd + ATR_REQ_GB_OFFSET; + gb_len = params_len - (ATR_REQ_GB_OFFSET + 1); + + return nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK, + comm_mode, gb, gb_len); } static int pn533_init_target(struct nfc_dev *nfc_dev, u32 protocols) diff --git a/include/linux/nfc.h b/include/linux/nfc.h index 548715881fb..d124e9273fc 100644 --- a/include/linux/nfc.h +++ b/include/linux/nfc.h @@ -56,6 +56,10 @@ * %NFC_ATTR_PROTOCOLS) * @NFC_EVENT_DEVICE_REMOVED: event emitted when a device is removed * (it sends %NFC_ATTR_DEVICE_INDEX) + * @NFC_EVENT_TM_ACTIVATED: event emitted when the adapter is activated in + * target mode. + * @NFC_EVENT_DEVICE_DEACTIVATED: event emitted when the adapter is deactivated + * from target mode. */ enum nfc_commands { NFC_CMD_UNSPEC, @@ -71,6 +75,8 @@ enum nfc_commands { NFC_EVENT_DEVICE_ADDED, NFC_EVENT_DEVICE_REMOVED, NFC_EVENT_TARGET_LOST, + NFC_EVENT_TM_ACTIVATED, + NFC_EVENT_TM_DEACTIVATED, /* private: internal use only */ __NFC_CMD_AFTER_LAST }; @@ -122,6 +128,7 @@ enum nfc_attrs { #define NFC_NFCID1_MAXSIZE 10 #define NFC_SENSB_RES_MAXSIZE 12 #define NFC_SENSF_RES_MAXSIZE 18 +#define NFC_GB_MAXSIZE 48 /* NFC protocols */ #define NFC_PROTO_JEWEL 1 diff --git a/include/net/nfc/nfc.h b/include/net/nfc/nfc.h index 97aa0e81aa8..41573b4bd78 100644 --- a/include/net/nfc/nfc.h +++ b/include/net/nfc/nfc.h @@ -198,4 +198,8 @@ int nfc_target_lost(struct nfc_dev *dev, u32 target_idx); int nfc_dep_link_is_up(struct nfc_dev *dev, u32 target_idx, u8 comm_mode, u8 rf_mode); +int nfc_tm_activated(struct nfc_dev *dev, u32 protocol, u8 comm_mode, + u8 *gb, size_t gb_len); +int nfc_tm_deactivated(struct nfc_dev *dev); + #endif /* __NET_NFC_H */ diff --git a/net/nfc/core.c b/net/nfc/core.c index c83717bfcb8..17f147430b7 100644 --- a/net/nfc/core.c +++ b/net/nfc/core.c @@ -455,6 +455,41 @@ u8 *nfc_get_local_general_bytes(struct nfc_dev *dev, size_t *gb_len) } EXPORT_SYMBOL(nfc_get_local_general_bytes); +int nfc_tm_activated(struct nfc_dev *dev, u32 protocol, u8 comm_mode, + u8 *gb, size_t gb_len) +{ + int rc; + + device_lock(&dev->dev); + + dev->polling = false; + + if (gb != NULL) { + rc = nfc_set_remote_general_bytes(dev, gb, gb_len); + if (rc < 0) + goto out; + } + + if (protocol == NFC_PROTO_NFC_DEP_MASK) + nfc_dep_link_is_up(dev, 0, comm_mode, NFC_RF_TARGET); + + rc = nfc_genl_tm_activated(dev, protocol); + +out: + device_unlock(&dev->dev); + + return rc; +} +EXPORT_SYMBOL(nfc_tm_activated); + +int nfc_tm_deactivated(struct nfc_dev *dev) +{ + dev->dep_link_up = false; + + return nfc_genl_tm_deactivated(dev); +} +EXPORT_SYMBOL(nfc_tm_deactivated); + /** * nfc_alloc_send_skb - allocate a skb for data exchange responses * diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c index a18fd56798f..21eaa9b5c6b 100644 --- a/net/nfc/netlink.c +++ b/net/nfc/netlink.c @@ -221,6 +221,68 @@ free_msg: return -EMSGSIZE; } +int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol) +{ + struct sk_buff *msg; + void *hdr; + + msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, + NFC_EVENT_TM_ACTIVATED); + if (!hdr) + goto free_msg; + + if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) + goto nla_put_failure; + if (nla_put_u32(msg, NFC_ATTR_TM_PROTOCOLS, protocol)) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + + genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL); + + return 0; + +nla_put_failure: + genlmsg_cancel(msg, hdr); +free_msg: + nlmsg_free(msg); + return -EMSGSIZE; +} + +int nfc_genl_tm_deactivated(struct nfc_dev *dev) +{ + struct sk_buff *msg; + void *hdr; + + msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, + NFC_EVENT_TM_DEACTIVATED); + if (!hdr) + goto free_msg; + + if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx)) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + + genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL); + + return 0; + +nla_put_failure: + genlmsg_cancel(msg, hdr); +free_msg: + nlmsg_free(msg); + return -EMSGSIZE; +} + int nfc_genl_device_added(struct nfc_dev *dev) { struct sk_buff *msg; diff --git a/net/nfc/nfc.h b/net/nfc/nfc.h index 7d9708f2a66..cd9fcbe5746 100644 --- a/net/nfc/nfc.h +++ b/net/nfc/nfc.h @@ -128,6 +128,9 @@ int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx, u8 comm_mode, u8 rf_mode); int nfc_genl_dep_link_down_event(struct nfc_dev *dev); +int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol); +int nfc_genl_tm_deactivated(struct nfc_dev *dev); + struct nfc_dev *nfc_get_device(unsigned int idx); static inline void nfc_put_device(struct nfc_dev *dev) -- cgit v1.2.3-70-g09d2 From 5e50ee3ae6e465be89dd0a66f78c3211a412d595 Mon Sep 17 00:00:00 2001 From: Samuel Ortiz Date: Thu, 31 May 2012 11:48:58 +0200 Subject: NFC: Switch to Initiator mode when getting NFC_ATTR_PROTOCOLS That is needed for keeping backward compatibility with apps using the old netlink polling API (NFC_ATTR_PROTOCOLS instead of NFC_ATTR_IM_PROTOCOLS). Signed-off-by: Samuel Ortiz --- net/nfc/netlink.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'net/nfc/netlink.c') diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c index 21eaa9b5c6b..03c31db38f1 100644 --- a/net/nfc/netlink.c +++ b/net/nfc/netlink.c @@ -597,11 +597,11 @@ static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info) if (info->attrs[NFC_ATTR_TM_PROTOCOLS]) tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]); - else if (info->attrs[NFC_ATTR_PROTOCOLS]) - tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]); if (info->attrs[NFC_ATTR_IM_PROTOCOLS]) im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]); + else if (info->attrs[NFC_ATTR_PROTOCOLS]) + im_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]); dev = nfc_get_device(idx); if (!dev) -- cgit v1.2.3-70-g09d2 From 58050fce3530939372e6c2f4b4beb76fcb4caa65 Mon Sep 17 00:00:00 2001 From: Thomas Graf Date: Thu, 28 Jun 2012 03:57:45 +0000 Subject: net: Use NLMSG_DEFAULT_SIZE in combination with nlmsg_new() Using NLMSG_GOODSIZE results in multiple pages being used as nlmsg_new() will automatically add the size of the netlink header to the payload thus exceeding the page limit. NLMSG_DEFAULT_SIZE takes this into account. Signed-off-by: Thomas Graf Cc: Jiri Pirko Cc: Dmitry Eremin-Solenikov Cc: Sergey Lapin Cc: Johannes Berg Cc: Lauro Ramos Venancio Cc: Aloisio Almeida Jr Cc: Samuel Ortiz Reviewed-by: Jiri Pirko Signed-off-by: David S. Miller --- drivers/net/team/team.c | 8 ++++---- drivers/net/wireless/mac80211_hwsim.c | 2 +- include/net/genetlink.h | 2 ++ net/ieee802154/netlink.c | 4 ++-- net/ieee802154/nl-mac.c | 2 +- net/ieee802154/nl-phy.c | 2 +- net/l2tp/l2tp_netlink.c | 6 +++--- net/nfc/netlink.c | 18 +++++++++--------- net/wireless/nl80211.c | 26 +++++++++++++------------- 9 files changed, 36 insertions(+), 34 deletions(-) (limited to 'net/nfc/netlink.c') diff --git a/drivers/net/team/team.c b/drivers/net/team/team.c index 5350eeaa22c..89853c31e7f 100644 --- a/drivers/net/team/team.c +++ b/drivers/net/team/team.c @@ -1476,7 +1476,7 @@ static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info) void *hdr; int err; - msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!msg) return -ENOMEM; @@ -1538,7 +1538,7 @@ static int team_nl_send_generic(struct genl_info *info, struct team *team, struct sk_buff *skb; int err; - skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); + skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!skb) return -ENOMEM; @@ -1648,7 +1648,7 @@ static int __send_and_alloc_skb(struct sk_buff **pskb, if (err) return err; } - *pskb = genlmsg_new(NLMSG_DEFAULT_SIZE - GENL_HDRLEN, GFP_KERNEL); + *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!*pskb) return -ENOMEM; return 0; @@ -2016,7 +2016,7 @@ static int team_nl_send_event_port_list_get(struct team *team) int err; struct net *net = dev_net(team->dev); - skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); + skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!skb) return -ENOMEM; diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c index a0b7cfd3468..a9ba3f7ea62 100644 --- a/drivers/net/wireless/mac80211_hwsim.c +++ b/drivers/net/wireless/mac80211_hwsim.c @@ -571,7 +571,7 @@ static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw, skb_dequeue(&data->pending); } - skb = genlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC); + skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_ATOMIC); if (skb == NULL) goto nla_put_failure; diff --git a/include/net/genetlink.h b/include/net/genetlink.h index ccb68880abf..48905cd3884 100644 --- a/include/net/genetlink.h +++ b/include/net/genetlink.h @@ -5,6 +5,8 @@ #include #include +#define GENLMSG_DEFAULT_SIZE (NLMSG_DEFAULT_SIZE - GENL_HDRLEN) + /** * struct genl_multicast_group - generic netlink multicast group * @name: name of the multicast group, names are per-family diff --git a/net/ieee802154/netlink.c b/net/ieee802154/netlink.c index c8097ae2482..97351e1d07a 100644 --- a/net/ieee802154/netlink.c +++ b/net/ieee802154/netlink.c @@ -44,7 +44,7 @@ struct genl_family nl802154_family = { struct sk_buff *ieee802154_nl_create(int flags, u8 req) { void *hdr; - struct sk_buff *msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC); + struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); unsigned long f; if (!msg) @@ -80,7 +80,7 @@ struct sk_buff *ieee802154_nl_new_reply(struct genl_info *info, int flags, u8 req) { void *hdr; - struct sk_buff *msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC); + struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); if (!msg) return NULL; diff --git a/net/ieee802154/nl-mac.c b/net/ieee802154/nl-mac.c index ca92587720f..1e9917124e7 100644 --- a/net/ieee802154/nl-mac.c +++ b/net/ieee802154/nl-mac.c @@ -530,7 +530,7 @@ static int ieee802154_list_iface(struct sk_buff *skb, if (!dev) return -ENODEV; - msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!msg) goto out_dev; diff --git a/net/ieee802154/nl-phy.c b/net/ieee802154/nl-phy.c index eed291626da..d54be34cca9 100644 --- a/net/ieee802154/nl-phy.c +++ b/net/ieee802154/nl-phy.c @@ -101,7 +101,7 @@ static int ieee802154_list_phy(struct sk_buff *skb, if (!phy) return -ENODEV; - msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!msg) goto out_dev; diff --git a/net/l2tp/l2tp_netlink.c b/net/l2tp/l2tp_netlink.c index ddc553e7667..d71cd9229a4 100644 --- a/net/l2tp/l2tp_netlink.c +++ b/net/l2tp/l2tp_netlink.c @@ -72,7 +72,7 @@ static int l2tp_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info) void *hdr; int ret = -ENOBUFS; - msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!msg) { ret = -ENOMEM; goto out; @@ -353,7 +353,7 @@ static int l2tp_nl_cmd_tunnel_get(struct sk_buff *skb, struct genl_info *info) goto out; } - msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!msg) { ret = -ENOMEM; goto out; @@ -699,7 +699,7 @@ static int l2tp_nl_cmd_session_get(struct sk_buff *skb, struct genl_info *info) goto out; } - msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!msg) { ret = -ENOMEM; goto out; diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c index 03c31db38f1..f4f07f9b61c 100644 --- a/net/nfc/netlink.c +++ b/net/nfc/netlink.c @@ -167,7 +167,7 @@ int nfc_genl_targets_found(struct nfc_dev *dev) dev->genl_data.poll_req_pid = 0; - msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC); + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); if (!msg) return -ENOMEM; @@ -195,7 +195,7 @@ int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx) struct sk_buff *msg; void *hdr; - msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!msg) return -ENOMEM; @@ -226,7 +226,7 @@ int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol) struct sk_buff *msg; void *hdr; - msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!msg) return -ENOMEM; @@ -258,7 +258,7 @@ int nfc_genl_tm_deactivated(struct nfc_dev *dev) struct sk_buff *msg; void *hdr; - msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!msg) return -ENOMEM; @@ -288,7 +288,7 @@ int nfc_genl_device_added(struct nfc_dev *dev) struct sk_buff *msg; void *hdr; - msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!msg) return -ENOMEM; @@ -321,7 +321,7 @@ int nfc_genl_device_removed(struct nfc_dev *dev) struct sk_buff *msg; void *hdr; - msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!msg) return -ENOMEM; @@ -434,7 +434,7 @@ int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx, pr_debug("DEP link is up\n"); - msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC); + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); if (!msg) return -ENOMEM; @@ -473,7 +473,7 @@ int nfc_genl_dep_link_down_event(struct nfc_dev *dev) pr_debug("DEP link is down\n"); - msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC); + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); if (!msg) return -ENOMEM; @@ -514,7 +514,7 @@ static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info) if (!dev) return -ENODEV; - msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!msg) { rc = -ENOMEM; goto out_putdev; diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 7ae54b82291..cbdc0fd67a1 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -7210,7 +7210,7 @@ void nl80211_send_scan_start(struct cfg80211_registered_device *rdev, { struct sk_buff *msg; - msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!msg) return; @@ -7286,7 +7286,7 @@ void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev, { struct sk_buff *msg; - msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!msg) return; @@ -7502,7 +7502,7 @@ void nl80211_send_connect_result(struct cfg80211_registered_device *rdev, struct sk_buff *msg; void *hdr; - msg = nlmsg_new(NLMSG_GOODSIZE, gfp); + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp); if (!msg) return; @@ -7542,7 +7542,7 @@ void nl80211_send_roamed(struct cfg80211_registered_device *rdev, struct sk_buff *msg; void *hdr; - msg = nlmsg_new(NLMSG_GOODSIZE, gfp); + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp); if (!msg) return; @@ -7580,7 +7580,7 @@ void nl80211_send_disconnected(struct cfg80211_registered_device *rdev, struct sk_buff *msg; void *hdr; - msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!msg) return; @@ -7842,7 +7842,7 @@ void nl80211_send_sta_event(struct cfg80211_registered_device *rdev, { struct sk_buff *msg; - msg = nlmsg_new(NLMSG_GOODSIZE, gfp); + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp); if (!msg) return; @@ -7863,7 +7863,7 @@ void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev, struct sk_buff *msg; void *hdr; - msg = nlmsg_new(NLMSG_GOODSIZE, gfp); + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp); if (!msg) return; @@ -8026,7 +8026,7 @@ nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev, struct nlattr *pinfoattr; void *hdr; - msg = nlmsg_new(NLMSG_GOODSIZE, gfp); + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp); if (!msg) return; @@ -8069,7 +8069,7 @@ void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev, struct nlattr *rekey_attr; void *hdr; - msg = nlmsg_new(NLMSG_GOODSIZE, gfp); + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp); if (!msg) return; @@ -8113,7 +8113,7 @@ void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev, struct nlattr *attr; void *hdr; - msg = nlmsg_new(NLMSG_GOODSIZE, gfp); + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp); if (!msg) return; @@ -8157,7 +8157,7 @@ void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev, struct sk_buff *msg; void *hdr; - msg = nlmsg_new(NLMSG_GOODSIZE, gfp); + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp); if (!msg) return; @@ -8192,7 +8192,7 @@ nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev, struct nlattr *pinfoattr; void *hdr; - msg = nlmsg_new(NLMSG_GOODSIZE, gfp); + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp); if (!msg) return; @@ -8236,7 +8236,7 @@ void cfg80211_probe_status(struct net_device *dev, const u8 *addr, void *hdr; int err; - msg = nlmsg_new(NLMSG_GOODSIZE, gfp); + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp); if (!msg) return; -- cgit v1.2.3-70-g09d2 From a831b9132065e1aa18acd7910d5f9c164a2f350f Mon Sep 17 00:00:00 2001 From: Samuel Ortiz Date: Thu, 28 Jun 2012 16:41:57 +0200 Subject: NFC: Do not return EBUSY when stopping a poll that's already stopped We check for the polling flag before checking if the netlink PID caller match. Signed-off-by: Samuel Ortiz --- net/nfc/netlink.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'net/nfc/netlink.c') diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c index 03c31db38f1..99bc6f7faa7 100644 --- a/net/nfc/netlink.c +++ b/net/nfc/netlink.c @@ -634,6 +634,15 @@ static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info) if (!dev) return -ENODEV; + device_lock(&dev->dev); + + if (!dev->polling) { + device_unlock(&dev->dev); + return -EINVAL; + } + + device_unlock(&dev->dev); + mutex_lock(&dev->genl_data.genl_data_mutex); if (dev->genl_data.poll_req_pid != info->snd_pid) { -- cgit v1.2.3-70-g09d2