ksym_tracer: Report error when failed to re-register hbp
When access type is changed, the hw break point will be
unregistered and then be registered again with new access
type. But the registration may fail, in this case, -errno
should be returned.
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: "K.Prasad" <prasad@linux.vnet.ibm.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <4A52E314.7070004@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/kernel/trace/trace_ksym.c b/kernel/trace/trace_ksym.c
index 8cbed5a..891e3b8 100644
--- a/kernel/trace/trace_ksym.c
+++ b/kernel/trace/trace_ksym.c
@@ -302,13 +302,13 @@
ret = count;
goto unlock_ret_path;
}
- }
+ } else
+ ret = count;
ksym_filter_entry_count--;
hlist_del_rcu(&(entry->ksym_hlist));
synchronize_rcu();
kfree(entry->ksym_hbp);
kfree(entry);
- ret = count;
goto err_ret;
} else {
/* Check for malformed request: (4) */