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Subject[PATCH v3] tracing/eprobe: no need to check for negative ret value for snprintf
Date
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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