staging: most: move initialization of pointer

This patch makes function store_add_link initialize the pointer to an AIM
right before the channel is probed. It is needed, the AIM may already call
most_start_channel while probe_channel is still running. At this point the
pointer to the AIM must not be NULL.

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 d5ef61d..21c550c 100644 (file)
--- a/drivers/staging/most/mostcore/core.c
+++ b/drivers/staging/most/mostcore/core.c
@@ -996,11 +996,14 @@ static ssize_t store_add_link(struct most_aim_obj *aim_obj,
        else
                return -ENOSPC;
 
+       *aim_ptr = aim_obj->driver;
        ret = aim_obj->driver->probe_channel(c->iface, c->channel_id,
                                             &c->cfg, &c->kobj, mdev_devnod);
-       if (ret)
+       if (ret) {
+               *aim_ptr = NULL;
                return ret;
-       *aim_ptr = aim_obj->driver;
+       }
+
        return len;
 }