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misc: mic/scif: re-take a lock on error path

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The caller expects that we take this lock again before returning
otherwise it you get double unlocks and races.

Fixes: ba612aa8b4 ('misc: mic: SCIF memory registration and unregistration')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Sudeep Dutt <sudeep.dutt@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dan Carpenter 2015-10-13 15:52:06 +03:00 committed by Greg Kroah-Hartman
parent edf5600870
commit ff65212cc4
1 changed files with 1 additions and 0 deletions
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drivers/misc/mic/scif/scif_rma.c
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@ -680,6 +680,7 @@ int scif_unregister_window(struct scif_window *window)
}
} else {
/* Return ENXIO since unregistration is in progress */
mutex_lock(&ep->rma_info.rma_lock);
return -ENXIO;
}
retry: