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selftests: fix poll error in udpgro.sh

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[ Upstream commit 38bf8cd821be292e7d8e6f6283d67c5d9708f887 ]

The test program udpgso_bench_rx always invokes the poll()
syscall with a timeout of 10ms. If a larger timeout is specified
via the command line, udpgso_bench_rx is supposed to do multiple
poll() calls till the timeout is expired or an event is received.

Currently the poll() loop errors out after the first invocation with
no events, and may causes self-tests failure alike:

failed
 GRO with custom segment size            ./udpgso_bench_rx: poll: 0x0 expected 0x1

This change addresses the issue allowing the poll() loop to consume
all the configured timeout.

Fixes: ada641ff6e ("selftests: fixes for UDP GRO")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Paolo Abeni 2020-12-09 12:21:13 +01:00 committed by Greg Kroah-Hartman
parent 0e2b048ffe
commit 6aa270eb2f
1 changed files with 3 additions and 0 deletions
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3
tools/testing/selftests/net/udpgso_bench_rx.c
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@ -113,6 +113,9 @@ static void do_poll(int fd, int timeout_ms)
interrupted = true;
break;
}
/* no events and more time to wait, do poll again */
continue;
}
if (pfd.revents != POLLIN)
error(1, errno, "poll: 0x%x expected 0x%x\n",