From: Sjur Brændeland <sjur.brandel...@stericsson.com>

Create the network interfaces statically at start up
instead of dynamically for each PDP activation.
---
 drivers/stemodem/gprs-context.c |   98 ++++++++++++++++++++------------------
 1 files changed, 52 insertions(+), 46 deletions(-)

diff --git a/drivers/stemodem/gprs-context.c b/drivers/stemodem/gprs-context.c
index 05fec3f..62643ee 100644
--- a/drivers/stemodem/gprs-context.c
+++ b/drivers/stemodem/gprs-context.c
@@ -28,6 +28,7 @@
 #include <string.h>
 #include <stdlib.h>
 #include <stdio.h>
+#include <errno.h>
 
 #include <glib.h>
 
@@ -153,8 +154,7 @@ static gint conn_compare_by_cid(gconstpointer a, 
gconstpointer b)
        return 0;
 }
 
-static struct conn_info *conn_info_create(unsigned int device,
-                                               unsigned int channel_id)
+static struct conn_info *conn_info_create(unsigned int channel_id)
 {
        struct conn_info *connection = g_try_new0(struct conn_info, 1);
 
@@ -162,7 +162,6 @@ static struct conn_info *conn_info_create(unsigned int 
device,
                return NULL;
 
        connection->cid = 0;
-       connection->device = device;
        connection->channel_id = channel_id;
 
        return connection;
@@ -171,7 +170,7 @@ static struct conn_info *conn_info_create(unsigned int 
device,
 /*
  * Creates a new IP interface for CAIF.
  */
-static gboolean caif_if_create(const char *interface, unsigned int connid)
+static gboolean caif_if_create(struct conn_info *conn)
 {
        return FALSE;
 }
@@ -179,9 +178,8 @@ static gboolean caif_if_create(const char *interface, 
unsigned int connid)
 /*
  * Removes IP interface for CAIF.
  */
-static gboolean caif_if_remove(const char *interface, unsigned int connid)
+static void caif_if_remove(struct conn_info *conn)
 {
-       return FALSE;
 }
 
 static void ste_eppsd_down_cb(gboolean ok, GAtResult *result,
@@ -191,7 +189,7 @@ static void ste_eppsd_down_cb(gboolean ok, GAtResult 
*result,
        ofono_gprs_context_cb_t cb = cbd->cb;
        struct ofono_gprs_context *gc = cbd->user;
        struct gprs_context_data *gcd = ofono_gprs_context_get_data(gc);
-       struct conn_info *conn;
+       struct conn_info *conn = NULL;
        GSList *l;
 
        if (!ok) {
@@ -214,13 +212,8 @@ static void ste_eppsd_down_cb(gboolean ok, GAtResult 
*result,
        }
 
        conn = l->data;
-
-       if (!caif_if_remove(conn->interface, conn->channel_id)) {
-               DBG("Failed to remove caif interface %s.",
-                               conn->interface);
-       }
-
        conn->cid = 0;
+       CALLBACK_WITH_SUCCESS(cb, cbd->data);
        return;
 
 error:
@@ -248,9 +241,7 @@ static void ste_eppsd_up_cb(gboolean ok, GAtResult *result, 
gpointer user_data)
                                conn_compare_by_cid);
 
        if (!l) {
-               DBG("Did not find data (device and channel id)"
-                                       "for connection with cid; %d",
-                                       gcd->active_context);
+               DBG("CAIF Device gone missing (cid:%d)", gcd->active_context);
                goto error;
        }
 
@@ -291,20 +282,9 @@ static void ste_eppsd_up_cb(gboolean ok, GAtResult 
*result, gpointer user_data)
        dns[1] = rsp.dns_server2;
        dns[2] = NULL;
 
-       sprintf(conn->interface, "caif%u", conn->device);
-
-       if (!caif_if_create(conn->interface, conn->channel_id)) {
-               ofono_error("Failed to create caif interface %s.",
-                               conn->interface);
-               CALLBACK_WITH_SUCCESS(cb, NULL, FALSE, rsp.ip_address,
+       CALLBACK_WITH_SUCCESS(cb, conn->interface, TRUE, rsp.ip_address,
                                rsp.subnet_mask, rsp.default_gateway,
                                dns, cbd->data);
-       } else {
-               CALLBACK_WITH_SUCCESS(cb, conn->interface,
-                               FALSE, rsp.ip_address, rsp.subnet_mask,
-                               rsp.default_gateway, dns, cbd->data);
-       }
-
        return;
 
 error:
@@ -316,6 +296,7 @@ error:
        if (conn)
                conn->cid = 0;
 
+       gcd->active_context = 0;
        CALLBACK_WITH_FAILURE(cb, NULL, 0, NULL, NULL, NULL, NULL, cbd->data);
 }
 
@@ -327,38 +308,43 @@ static void ste_cgdcont_cb(gboolean ok, GAtResult 
*result, gpointer user_data)
        struct gprs_context_data *gcd = ofono_gprs_context_get_data(gc);
        struct cb_data *ncbd = NULL;
        char buf[128];
-       struct conn_info *conn;
+       struct conn_info *conn = NULL;
        GSList *l;
 
+       l = g_slist_find_custom(g_caif_devices,
+                               GUINT_TO_POINTER(gcd->active_context),
+                               conn_compare_by_cid);
+
+       if (!l) {
+               DBG("CAIF Device gone missing (cid:%d)", gcd->active_context);
+               goto error;
+       }
+
+       conn = l->data;
+
        if (!ok) {
                struct ofono_error error;
 
+               conn->cid = 0;
                gcd->active_context = 0;
+
                decode_at_error(&error, g_at_result_final_response(result));
                cb(&error, NULL, 0, NULL, NULL, NULL, NULL, cbd->data);
                return;
        }
 
-       ncbd = g_memdup(cbd, sizeof(struct cb_data));
-
-       l = g_slist_find_custom(g_caif_devices, GUINT_TO_POINTER(0),
-                               conn_compare_by_cid);
-
-       if (!l) {
-               DBG("at_cgdcont_cb, no more available devices");
-               goto error;
-       }
-
-       conn = l->data;
-       conn->cid = gcd->active_context;
        snprintf(buf, sizeof(buf), "AT*EPPSD=1,%u,%u",
                        conn->channel_id, conn->cid);
+       ncbd = g_memdup(cbd, sizeof(struct cb_data));
 
        if (g_at_chat_send(gcd->chat, buf, NULL,
                                ste_eppsd_up_cb, ncbd, g_free) > 0)
                return;
 
 error:
+       if (conn)
+               conn->cid = 0;
+
        g_free(ncbd);
 
        gcd->active_context = 0;
@@ -375,6 +361,8 @@ static void ste_gprs_activate_primary(struct 
ofono_gprs_context *gc,
        struct cb_data *cbd = cb_data_new(cb, data);
        char buf[AUTH_BUF_LENGTH];
        int len;
+       GSList *l;
+       struct conn_info *conn = NULL;
 
        if (!cbd)
                goto error;
@@ -382,6 +370,18 @@ static void ste_gprs_activate_primary(struct 
ofono_gprs_context *gc,
        gcd->active_context = ctx->cid;
        cbd->user = gc;
 
+       /* Find free connection with cid zero */
+       l = g_slist_find_custom(g_caif_devices, GUINT_TO_POINTER(0),
+                               conn_compare_by_cid);
+
+       if (!l) {
+               DBG("No more available CAIF devices");
+               goto error;
+       }
+
+       conn = l->data;
+       conn->cid = ctx->cid;
+
        len = snprintf(buf, sizeof(buf), "AT+CGDCONT=%u,\"IP\"", ctx->cid);
 
        if (ctx->apn)
@@ -405,6 +405,9 @@ static void ste_gprs_activate_primary(struct 
ofono_gprs_context *gc,
        return;
 
 error:
+       if (conn)
+               conn->cid = 0;
+
        gcd->active_context = 0;
        g_free(cbd);
 
@@ -431,8 +434,8 @@ static void ste_gprs_deactivate_primary(struct 
ofono_gprs_context *gc,
                                conn_compare_by_cid);
 
        if (!l) {
-               DBG("at_gprs_deactivate_primary, did not find"
-                       "data (channel id) for connection with cid; %d", id);
+               DBG("did not find data (channel id) "
+                               "for connection with cid; %d", id);
                goto error;
        }
 
@@ -524,9 +527,11 @@ static int ste_gprs_context_probe(struct 
ofono_gprs_context *gc,
        ofono_gprs_context_set_data(gc, gcd);
 
        for (i = 0; i < MAX_CAIF_DEVICES; i++) {
-               ci = conn_info_create(i, i+1);
-               if (ci)
-                       g_caif_devices = g_slist_append(g_caif_devices, ci);
+               ci = conn_info_create(i+1);
+               if (!ci)
+                       return -ENOMEM;
+               caif_if_create(ci);
+               g_caif_devices = g_slist_append(g_caif_devices, ci);
        }
 
        return 0;
@@ -536,6 +541,7 @@ static void ste_gprs_context_remove(struct 
ofono_gprs_context *gc)
 {
        struct gprs_context_data *gcd = ofono_gprs_context_get_data(gc);
 
+       g_slist_foreach(g_caif_devices, (GFunc) caif_if_remove, NULL);
        g_slist_foreach(g_caif_devices, (GFunc) g_free, NULL);
        g_slist_free(g_caif_devices);
        g_caif_devices = NULL;
-- 
1.6.3.3

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