staging: most: core: show all linked channels

This patch is needed to have all linked channels being reported by the
show() function of the attribute file add_link. Currently user space can
only read back the latest link that has been established to a certain
channel.

Signed-off-by: Andrey Shvetsov <andrey.shvetsov@k2l.de>
Signed-off-by: Christian Gromm <christian.gromm@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/most/mostcore/core.c b/drivers/staging/most/mostcore/core.c
index db0606ca9f79d080c0486e5ead0ffa771c0c9133..bd555ecfe0b935685afa39173fb5d6313894e123 100644 (file)
--- a/drivers/staging/most/mostcore/core.c
+++ b/drivers/staging/most/mostcore/core.c
@@ -848,7 +848,23 @@ static ssize_t show_add_link(struct most_aim_obj *aim_obj,
                             struct most_aim_attribute *attr,
                             char *buf)
 {
-       return snprintf(buf, PAGE_SIZE, "%s\n", aim_obj->add_link);
+       struct most_c_obj *c;
+       struct most_inst_obj *i;
+       int offs = 0;
+
+       list_for_each_entry(i, &instance_list, list) {
+               list_for_each_entry(c, &i->channel_list, list) {
+                       if (c->aim0.ptr == aim_obj->driver ||
+                           c->aim1.ptr == aim_obj->driver) {
+                               offs += snprintf(buf + offs, PAGE_SIZE - offs,
+                                                "%s:%s\n",
+                                                kobject_name(&i->kobj),
+                                                kobject_name(&c->kobj));
+                       }
+               }
+       }
+
+       return offs;
 }
 
 /**