diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-01-15 15:37:46 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-01-15 15:37:46 +0100 |
| commit | cb7edfd4cd47ed50ea618b660ee283a2d99edff2 (patch) | |
| tree | fb2749afac5055798dcf8f0dca77c88e749307da /tools/lib/traceevent/trace-seq.c | |
| parent | 6756f4c375db11af7039985636bddde676615a94 (diff) | |
| parent | 1c7fc5cbc33980acd13d668f1c8f0313d6ae9fd8 (diff) | |
Merge 5.0-rc2 into usb-next
We need the USB fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/lib/traceevent/trace-seq.c')
| -rw-r--r-- | tools/lib/traceevent/trace-seq.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/tools/lib/traceevent/trace-seq.c b/tools/lib/traceevent/trace-seq.c index 8ff1d55954d1..8d5ecd2bf877 100644 --- a/tools/lib/traceevent/trace-seq.c +++ b/tools/lib/traceevent/trace-seq.c @@ -100,7 +100,8 @@ static void expand_buffer(struct trace_seq *s) * @fmt: printf format string * * It returns 0 if the trace oversizes the buffer's free - * space, 1 otherwise. + * space, the number of characters printed, or a negative + * value in case of an error. * * The tracer may use either sequence operations or its own * copy to user routines. To simplify formating of a trace @@ -129,9 +130,10 @@ trace_seq_printf(struct trace_seq *s, const char *fmt, ...) goto try_again; } - s->len += ret; + if (ret > 0) + s->len += ret; - return 1; + return ret; } /** @@ -139,6 +141,10 @@ trace_seq_printf(struct trace_seq *s, const char *fmt, ...) * @s: trace sequence descriptor * @fmt: printf format string * + * It returns 0 if the trace oversizes the buffer's free + * space, the number of characters printed, or a negative + * value in case of an error. + * * * The tracer may use either sequence operations or its own * copy to user routines. To simplify formating of a trace * trace_seq_printf is used to store strings into a special @@ -163,9 +169,10 @@ trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args) goto try_again; } - s->len += ret; + if (ret > 0) + s->len += ret; - return len; + return ret; } /** |