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udev: don't reset immediately

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Executing a reset each time the modem is unbound is a bit too extreme:
the modem sometimes recovers by itself and only needs a "soft" reset
sequence (unbind/bind).

This commit introduces a short timer (2s) so we the modem can settle in.
If reset fails after this time, the modem is probably completely broken,
or already rebooting, so we can safely issue a reset AT command.
This commit is contained in:
Arnaud Ferraris
2021-10-06 22:35:36 +02:00
parent 25dd46bb30
commit af4d5ca1c1
3 changed files with 10 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
src/manager.c
View File

@@ -145,13 +145,13 @@ static gboolean modem_reset_done(struct EG25Manager* manager)
return FALSE;
}
void modem_reset(struct EG25Manager *manager)
gboolean modem_reset(struct EG25Manager *manager)
{
int fd, ret, len;
if (manager->reset_timer) {
g_message("modem_reset: timer already setup, skipping...");
return;
return G_SOURCE_REMOVE;
}
/*
@@ -161,7 +161,7 @@ void modem_reset(struct EG25Manager *manager)
*/
if (manager->modem_iface != MODEM_IFACE_MODEMMANAGER) {
g_message("modem_reset: not using ModemManager, bail out!");
return;
return G_SOURCE_REMOVE;
}
if (manager->modem_recovery_timer) {
@@ -212,7 +212,7 @@ void modem_reset(struct EG25Manager *manager)
*/
manager->reset_timer = g_timeout_add_seconds(3, G_SOURCE_FUNC(modem_reset_done), manager);
return;
return G_SOURCE_REMOVE;
error:
// Release blocking sleep inhibitor
@@ -229,6 +229,8 @@ error:
// Setup timer for making sure we don't queue other reset commands
manager->reset_timer = g_timeout_add_seconds(30, G_SOURCE_FUNC(modem_reset_done), manager);
return G_SOURCE_REMOVE;
}
void modem_suspend_pre(struct EG25Manager *manager)

2
src/manager.h
View File

@@ -119,7 +119,7 @@ struct EG25Manager {
};
void modem_configure(struct EG25Manager *data);
void modem_reset(struct EG25Manager *data);
gboolean modem_reset(struct EG25Manager *data);
void modem_suspend_pre(struct EG25Manager *data);
void modem_suspend_post(struct EG25Manager *data);
void modem_resume_pre(struct EG25Manager *data);

6
src/udev.c
View File

@@ -16,12 +16,12 @@ static void udev_event_cb(GUdevClient *client, gchar *action, GUdevDevice *devic
manager->modem_state == EG25_STATE_RESETTING ||
!manager->modem_usb_id) {
return;
}
}
if (strncmp(g_udev_device_get_name(device), manager->modem_usb_id, strlen(manager->modem_usb_id)) == 0 &&
if (strcmp(g_udev_device_get_name(device), manager->modem_usb_id) == 0 &&
manager->reset_timer == 0) {
g_message("Lost modem, resetting...");
modem_reset(manager);
g_timeout_add_seconds(2, G_SOURCE_FUNC(modem_reset), manager);
}
}