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selftests: net: tfo: Fix build warning

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Fix

tfo.c: In function ‘run_server’:
tfo.c:84:9: warning: ignoring return value of ‘read’ declared with attribute ‘warn_unused_result’

by evaluating the return value from read() and displaying an error message
if it reports an error.

Fixes: c65b5bb232 ("selftests: net: add passive TFO test binary")
Cc: David Wei <dw@davidwei.uk>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Link: https://patch.msgid.link/20251205171010.515236-14-linux@roeck-us.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Guenter Roeck 2025-12-05 09:10:07 -08:00 committed by Jakub Kicinski
parent 59546e8744
commit 91dc09a609
1 changed files with 2 additions and 1 deletions
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3
tools/testing/selftests/net/tfo.c
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@ -81,7 +81,8 @@ static void run_server(void)
if (getsockopt(connfd, SOL_SOCKET, SO_INCOMING_NAPI_ID, &opt, &len) < 0)
error(1, errno, "getsockopt(SO_INCOMING_NAPI_ID)");
read(connfd, buf, 64);
if (read(connfd, buf, 64) < 0)
perror("read()");
fprintf(outfile, "%d\n", opt);
fclose(outfile);