ftrace: fix trace_output

Impact: fix bug for handling partial line

trace_seq_printf(), seq_print_userip_objs(), ... return
0          -- partial line was written
other(>0)  -- success

duplicate output is also removed in trace_print_raw().

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 2 insertions, 2 deletions

diff --git a/kernel/trace/trace_output.h b/kernel/trace/trace_output.h
index ecab4ea4a4fd..b2c14615e0cd 100644
--- a/kernel/trace/trace_output.h
+++ b/kernel/trace/trace_output.h
@@ -45,14 +45,14 @@ trace_nop_print(struct trace_seq *s, struct trace_entry *entry, int flags);
 #define SEQ_PUT_FIELD_RET(s, x)                         \
 do {                                                    \
         if (!trace_seq_putmem(s, &(x), sizeof(x)))      \
-                return 0;                               \
+                return TRACE_TYPE_PARTIAL_LINE;         \
 } while (0)
 
 #define SEQ_PUT_HEX_FIELD_RET(s, x)                     \
 do {                                                    \
         BUILD_BUG_ON(sizeof(x) > MAX_MEMHEX_BYTES);     \
         if (!trace_seq_putmem_hex(s, &(x), sizeof(x)))  \
-                return 0;                               \
+                return TRACE_TYPE_PARTIAL_LINE;         \
 } while (0)
 
 #endif