From 8d545c8f958f5f433c50a00762ce1f231ed56eee Mon Sep 17 00:00:00 2001 From: Sjur Braendeland Date: Wed, 28 Apr 2010 08:54:37 +0000 Subject: caif: Disconnect without waiting for response Changes: o Function cfcnfg_disconn_adapt_layer is changed to do asynchronous disconnect, not waiting for any response from the modem. Due to this the function cfcnfg_linkdestroy_rsp does nothing anymore. o Because disconnect may take down a connection before a connect response is received the function cfcnfg_linkup_rsp is checking if the client is still waiting for the response, if not a disconnect request is sent to the modem. o cfctrl is no longer keeping track of pending disconnect requests. o Added function cfctrl_cancel_req, which is used for deleting a pending connect request if disconnect is done before connect response is received. o Removed unused function cfctrl_insert_req2 o Added better handling of connect reject from modem. Signed-off-by: Sjur Braendeland Signed-off-by: David S. Miller --- net/caif/cfcnfg.c | 155 ++++++++++++++++-------------------------------------- 1 file changed, 45 insertions(+), 110 deletions(-) (limited to 'net/caif/cfcnfg.c') diff --git a/net/caif/cfcnfg.c b/net/caif/cfcnfg.c index f94f3df..471c629 100644 --- a/net/caif/cfcnfg.c +++ b/net/caif/cfcnfg.c @@ -54,8 +54,7 @@ struct cfcnfg { static void cfcnfg_linkup_rsp(struct cflayer *layer, u8 channel_id, enum cfctrl_srv serv, u8 phyid, struct cflayer *adapt_layer); -static void cfcnfg_linkdestroy_rsp(struct cflayer *layer, u8 channel_id, - struct cflayer *client_layer); +static void cfcnfg_linkdestroy_rsp(struct cflayer *layer, u8 channel_id); static void cfcnfg_reject_rsp(struct cflayer *layer, u8 channel_id, struct cflayer *adapt_layer); static void cfctrl_resp_func(void); @@ -175,73 +174,65 @@ int cfcnfg_get_named(struct cfcnfg *cnfg, char *name) return 0; } -/* - * NOTE: What happens on destroy failure: - * 1a) No response - Too early - * This will not happen because enumerate has already - * completed. - * 1b) No response - FATAL - * Not handled, but this should be a CAIF PROTOCOL ERROR - * Modem error, response is really expected - this - * case is not really handled. - * 2) O/E-bit indicate error - * Ignored - this link is destroyed anyway. - * 3) Not able to match on request - * Not handled, but this should be a CAIF PROTOCOL ERROR - * 4) Link-Error - (no response) - * Not handled, but this should be a CAIF PROTOCOL ERROR - */ int cfcnfg_disconn_adapt_layer(struct cfcnfg *cnfg, struct cflayer *adap_layer) { u8 channel_id = 0; int ret = 0; + struct cflayer *servl = NULL; struct cfcnfg_phyinfo *phyinfo = NULL; u8 phyid = 0; - caif_assert(adap_layer != NULL); channel_id = adap_layer->id; - if (channel_id == 0) { + if (adap_layer->dn == NULL || channel_id == 0) { pr_err("CAIF: %s():adap_layer->id is 0\n", __func__); ret = -ENOTCONN; goto end; } - - if (adap_layer->dn == NULL) { - pr_err("CAIF: %s():adap_layer->dn is NULL\n", __func__); - ret = -ENODEV; - goto end; - } - - if (adap_layer->dn != NULL) - phyid = cfsrvl_getphyid(adap_layer->dn); - - phyinfo = cfcnfg_get_phyinfo(cnfg, phyid); - if (phyinfo == NULL) { - pr_warning("CAIF: %s(): No interface to send disconnect to\n", - __func__); - ret = -ENODEV; + servl = cfmuxl_remove_uplayer(cnfg->mux, channel_id); + if (servl == NULL) goto end; - } - - if (phyinfo->id != phyid - || phyinfo->phy_layer->id != phyid - || phyinfo->frm_layer->id != phyid) { - - pr_err("CAIF: %s(): Inconsistency in phy registration\n", - __func__); + layer_set_up(servl, NULL); + ret = cfctrl_linkdown_req(cnfg->ctrl, channel_id, adap_layer); + if (servl == NULL) { + pr_err("CAIF: %s(): PROTOCOL ERROR " + "- Error removing service_layer Channel_Id(%d)", + __func__, channel_id); ret = -EINVAL; goto end; } + caif_assert(channel_id == servl->id); + if (adap_layer->dn != NULL) { + phyid = cfsrvl_getphyid(adap_layer->dn); - ret = cfctrl_linkdown_req(cnfg->ctrl, channel_id, adap_layer); - -end: + phyinfo = cfcnfg_get_phyinfo(cnfg, phyid); + if (phyinfo == NULL) { + pr_warning("CAIF: %s(): " + "No interface to send disconnect to\n", + __func__); + ret = -ENODEV; + goto end; + } + if (phyinfo->id != phyid || + phyinfo->phy_layer->id != phyid || + phyinfo->frm_layer->id != phyid) { + pr_err("CAIF: %s(): " + "Inconsistency in phy registration\n", + __func__); + ret = -EINVAL; + goto end; + } + } if (phyinfo != NULL && --phyinfo->phy_ref_count == 0 && phyinfo->phy_layer != NULL && phyinfo->phy_layer->modemcmd != NULL) { phyinfo->phy_layer->modemcmd(phyinfo->phy_layer, _CAIF_MODEMCMD_PHYIF_USELESS); } +end: + cfsrvl_put(servl); + cfctrl_cancel_req(cnfg->ctrl, adap_layer); + if (adap_layer->ctrlcmd != NULL) + adap_layer->ctrlcmd(adap_layer, CAIF_CTRLCMD_DEINIT_RSP, 0); return ret; } @@ -254,69 +245,11 @@ void cfcnfg_release_adap_layer(struct cflayer *adap_layer) } EXPORT_SYMBOL(cfcnfg_release_adap_layer); -static void cfcnfg_linkdestroy_rsp(struct cflayer *layer, u8 channel_id, - struct cflayer *client_layer) +static void cfcnfg_linkdestroy_rsp(struct cflayer *layer, u8 channel_id) { - struct cfcnfg *cnfg = container_obj(layer); - struct cflayer *servl; - - /* - * 1) Remove service from the MUX layer. The MUX must - * guarante that no more payload sent "upwards" (receive) - */ - servl = cfmuxl_remove_uplayer(cnfg->mux, channel_id); - - if (servl == NULL) { - pr_err("CAIF: %s(): PROTOCOL ERROR " - "- Error removing service_layer Channel_Id(%d)", - __func__, channel_id); - return; - } - caif_assert(channel_id == servl->id); - - if (servl != client_layer && servl->up != client_layer) { - pr_err("CAIF: %s(): Error removing service_layer " - "Channel_Id(%d) %p %p", - __func__, channel_id, (void *) servl, - (void *) client_layer); - return; - } - - /* - * 2) DEINIT_RSP must guarantee that no more packets are transmitted - * from client (adap_layer) when it returns. - */ - - if (servl->ctrlcmd == NULL) { - pr_err("CAIF: %s(): Error servl->ctrlcmd == NULL", __func__); - return; - } - - servl->ctrlcmd(servl, CAIF_CTRLCMD_DEINIT_RSP, 0); - - /* 3) It is now safe to destroy the service layer. */ - cfservl_destroy(servl); } -/* - * NOTE: What happens on linksetup failure: - * 1a) No response - Too early - * This will not happen because enumerate is secured - * before using interface. - * 1b) No response - FATAL - * Not handled, but this should be a CAIF PROTOCOL ERROR - * Modem error, response is really expected - this case is - * not really handled. - * 2) O/E-bit indicate error - * Handled in cnfg_reject_rsp - * 3) Not able to match on request - * Not handled, but this should be a CAIF PROTOCOL ERROR - * 4) Link-Error - (no response) - * Not handled, but this should be a CAIF PROTOCOL ERROR - */ - -int -cfcnfg_add_adaptation_layer(struct cfcnfg *cnfg, +int cfcnfg_add_adaptation_layer(struct cfcnfg *cnfg, struct cfctrl_link_param *param, struct cflayer *adap_layer) { @@ -346,8 +279,7 @@ cfcnfg_add_adaptation_layer(struct cfcnfg *cnfg, param->phyid); /* FIXME: ENUMERATE INITIALLY WHEN ACTIVATING PHYSICAL INTERFACE */ cfctrl_enum_req(cnfg->ctrl, param->phyid); - cfctrl_linkup_request(cnfg->ctrl, param, adap_layer); - return 0; + return cfctrl_linkup_request(cnfg->ctrl, param, adap_layer); } EXPORT_SYMBOL(cfcnfg_add_adaptation_layer); @@ -367,8 +299,10 @@ cfcnfg_linkup_rsp(struct cflayer *layer, u8 channel_id, enum cfctrl_srv serv, struct cflayer *servicel = NULL; struct cfcnfg_phyinfo *phyinfo; if (adapt_layer == NULL) { - pr_err("CAIF: %s(): PROTOCOL ERROR " - "- LinkUp Request/Response did not match\n", __func__); + pr_debug("CAIF: %s(): link setup response " + "but no client exist, send linkdown back\n", + __func__); + cfctrl_linkdown_req(cnfg->ctrl, channel_id, NULL); return; } @@ -424,6 +358,7 @@ cfcnfg_linkup_rsp(struct cflayer *layer, u8 channel_id, enum cfctrl_srv serv, cfmuxl_set_uplayer(cnfg->mux, servicel, channel_id); layer_set_up(servicel, adapt_layer); layer_set_dn(adapt_layer, servicel); + cfsrvl_get(servicel); servicel->ctrlcmd(servicel, CAIF_CTRLCMD_INIT_RSP, 0); } -- cgit v1.1