Messages in this thread Patch in this message | | | From | Quanfa Fu <> | Subject | [PATCH v3] tracing/eprobe: no need to check for negative ret value for snprintf | Date | Mon, 9 Jan 2023 12:06:25 +0800 |
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No need to check for negative return value from snprintf() as the code does not return negative values.
Signed-off-by: Quanfa Fu <quanfafu@gmail.com>
----- V2 -> V3: continue to use snprintf V1 -> V2: memory allc uses kzalloc and replace snprintf with memcpy --- kernel/trace/trace_eprobe.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-)
diff --git a/kernel/trace/trace_eprobe.c b/kernel/trace/trace_eprobe.c index 352b65e2b910..594ac1d086aa 100644 --- a/kernel/trace/trace_eprobe.c +++ b/kernel/trace/trace_eprobe.c @@ -923,17 +923,13 @@ static int trace_eprobe_parse_filter(struct trace_eprobe *ep, int argc, const ch p = ep->filter_str; for (i = 0; i < argc; i++) { - ret = snprintf(p, len, "%s ", argv[i]); - if (ret < 0) - goto error; - if (ret > len) { - ret = -E2BIG; - goto error; - } + if (i) + ret = snprintf(p, len, " %s", argv[i]); + else + ret = snprintf(p, len, "%s", argv[i]); p += ret; len -= ret; } - p[-1] = '\0'; /* * Ensure the filter string can be parsed correctly. Note, this -- 2.31.1
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