[PATCH 6/8] ksym_tracer: Report error when failed to re-registerhbp

[Li Zefan]

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@xxxxxxxxxxxxxx>
---
 kernel/trace/trace_ksym.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

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 @@ static ssize_t ksym_trace_filter_write(struct file *file,
 				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) */
-- 
1.5.4.rc3

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