[PATCH] greybus: audio_manager: fix a missing check of ida_simple_get

[Kangjie Lu]

ida_simple_get could fail. The fix inserts a check for its
return value.

Signed-off-by: Kangjie Lu <k...@umn.edu>
---
 drivers/staging/greybus/audio_manager.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/staging/greybus/audio_manager.c 
b/drivers/staging/greybus/audio_manager.c
index d44b070d8862..c2a4af4c1d06 100644
--- a/drivers/staging/greybus/audio_manager.c
+++ b/drivers/staging/greybus/audio_manager.c
@@ -45,6 +45,9 @@ int gb_audio_manager_add(struct 
gb_audio_manager_module_descriptor *desc)
        int err;
 
        id = ida_simple_get(&module_id, 0, 0, GFP_KERNEL);
+       if (id < 0)
+               return id;
+
        err = gb_audio_manager_module_create(&module, manager_kset,
                                             id, desc);
        if (err) {
-- 
2.17.1