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mei: bus: report if event registration failed

Browse source 
If event registeration has failed, the caller should know
about it.

Signed-off-by: Tomas Winkler <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Tomas Winkler 2015-07-23 15:08:38 +03:00 • committed by Greg Kroah-Hartman
commit 48168f4561
1 changed files with 5 additions and 1 deletions
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6
drivers/misc/mei/bus.c
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@ -256,6 +256,8 @@ void mei_cl_bus_rx_event(struct mei_cl *cl)
int mei_cl_register_event_cb(struct mei_cl_device *cldev,
mei_cl_event_cb_t event_cb, void *context)
{
int ret;
if (cldev->event_cb)
return -EALREADY;
@ -264,7 +266,9 @@ int mei_cl_register_event_cb(struct mei_cl_device *cldev,
cldev->event_context = context;
INIT_WORK(&cldev->event_work, mei_bus_event_work);
mei_cl_read_start(cldev->cl, 0, NULL);
ret = mei_cl_read_start(cldev->cl, 0, NULL);
if (ret && ret != -EBUSY)
return ret;
return 0;
}