On Mon, 14 Aug 2023 at 21:23, Richard Fitzgerald <rf@xxxxxxxxxxxxxxxxxxxxx> wrote: > > If the result of the formatted string is an empty string just return > instead of creating an empty fragment. > > Signed-off-by: Richard Fitzgerald <rf@xxxxxxxxxxxxxxxxxxxxx> > --- Nice catch! Reviewed-by: David Gow <davidgow@xxxxxxxxxx> Cheers, -- David > lib/kunit/string-stream.c | 10 ++++++++-- > 1 file changed, 8 insertions(+), 2 deletions(-) > > diff --git a/lib/kunit/string-stream.c b/lib/kunit/string-stream.c > index cc32743c1171..ed24d86af9f5 100644 > --- a/lib/kunit/string-stream.c > +++ b/lib/kunit/string-stream.c > @@ -50,11 +50,17 @@ int string_stream_vadd(struct string_stream *stream, > /* Make a copy because `vsnprintf` could change it */ > va_copy(args_for_counting, args); > > - /* Need space for null byte. */ > - len = vsnprintf(NULL, 0, fmt, args_for_counting) + 1; > + /* Evaluate length of formatted string */ > + len = vsnprintf(NULL, 0, fmt, args_for_counting); > > va_end(args_for_counting); > > + if (len == 0) > + return 0; > + > + /* Need space for null byte. */ > + len++; > + > frag_container = alloc_string_stream_fragment(stream->test, > len, > stream->gfp); > -- > 2.30.2 >
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