linux-kernel - [PATCH v3 03/16] selftests/resctrl: Fix closing IMC fds on error

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Date: Mon,  8 Apr 2024 19:32:34 +0300
From: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To: linux-kselftest@...r.kernel.org,
	Reinette Chatre <reinette.chatre@...el.com>,
	Shuah Khan <shuah@...nel.org>,
	Babu Moger <babu.moger@....com>,
	Maciej Wieczór-Retman <maciej.wieczor-retman@...el.com>
Cc: Fenghua Yu <fenghua.yu@...el.com>,
	linux-kernel@...r.kernel.org,
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Subject: [PATCH v3 03/16] selftests/resctrl: Fix closing IMC fds on error

If perf_open_imc_mem_bw() fails to open for a perf fd after the first
one, the already opened fds remain open and error is directly returned.

Close the fds inside perf_open_imc_mem_bw() if an error occurs.

Fixes: 7f4d257e3a2a ("selftests/resctrl: Add callback to start a benchmark")
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
---

v3:
- New patch
---
 tools/testing/selftests/resctrl/resctrl_val.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/resctrl/resctrl_val.c b/tools/testing/selftests/resctrl/resctrl_val.c
index ca4da7f4cf25..f2b6824cd5f2 100644
--- a/tools/testing/selftests/resctrl/resctrl_val.c
+++ b/tools/testing/selftests/resctrl/resctrl_val.c
@@ -306,13 +306,23 @@ static int perf_open_imc_mem_bw(int cpu_no)
 	for (imc = 0; imc < imcs; imc++) {
 		ret = open_perf_event(imc, cpu_no, READ);
 		if (ret)
-			return -1;
+			goto close_fds;
 		ret = open_perf_event(imc, cpu_no, WRITE);
 		if (ret)
-			return -1;
+			goto close_read_fd;
 	}
 
 	return 0;
+
+close_read_fd:
+	close(imc_counters_config[imc][READ].fd);
+close_fds:
+	while (imc--) {
+		close(imc_counters_config[imc][READ].fd);
+		close(imc_counters_config[imc][WRITE].fd);
+	}
+
+	return -1;
 }
 
 /*
-- 
2.39.2