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Locate non-unifying receiver by looking for hidraw with hiddev exposed.

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For non unifying receiver we were trying to locate receiver hiddraw
device by looking into INTERFACES property. This doesn't work well
for non-unifying devices from keyboard+mouse sets (which use single
dongle for 2 devices but are still non-unifying).

The only thing that's different between hiddraw receiver and other
devices (mouse, keyboard etc) is that receiver also exposes hiddev
interface.

Use that fact to reliably locate receiver.

Signed-off-by: Arkadiusz Miśkiewicz <arekm@maven.pl>
Signed-off-by: Richard Hughes <richard@hughsie.com>
This commit is contained in:
Arkadiusz Miśkiewicz 2013-03-28 09:59:55 +01:00 • committed by Richard Hughes
parent d4bec29c82
commit 09fa9d5463
1 changed files with 23 additions and 2 deletions
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25
src/linux/up-device-unifying.c
View file

@ -183,11 +183,32 @@ up_device_unifying_coldplug (UpDevice *device)
hidraw_list = g_udev_client_query_by_subsystem (client, "hidraw");
for (l = hidraw_list; l != NULL; l = l->next) {
if (g_strcmp0 (type, "lg-wireless") == 0) {
gboolean receiver_found = FALSE;
const gchar *filename;
GDir* dir;
if (g_strcmp0 (g_udev_device_get_sysfs_path (native),
g_udev_device_get_sysfs_path(g_udev_device_get_parent(l->data))) != 0)
continue;
// Ugly way to distinguish receiver itself from mouse/keyboard etc for non-unifying dongles
if (g_strcmp0(g_udev_device_get_property(g_udev_device_get_parent (native), "INTERFACE"), "3/0/0") != 0)
/* hidraw device which exposes hiddev interface is our receiver */
tmp = g_build_filename(g_udev_device_get_sysfs_path (g_udev_device_get_parent(native)),
"usbmisc", NULL);
dir = g_dir_open (tmp, 0, &error);
g_free(tmp);
if (error) {
g_clear_error(&error);
continue;
}
while ( (filename = g_dir_read_name(dir)) ) {
if (g_ascii_strncasecmp(filename, "hiddev", 6) == 0) {
receiver_found = TRUE;
break;
}
}
g_dir_close(dir);
if (!receiver_found)
continue;
} else {
if (g_strcmp0 (g_udev_device_get_sysfs_path (parent),