[PATCH 5.19 0915/1157] selftests/powerpc: Skip energy_scale_info test on older firmware

Greg Kroah-Hartman
2022-08-16T00:42:13Z

From: Michael Ellerman <mpe@ellerman.id.au>

[ Upstream commit 4228a996b072d36f3baafb4afdc2d2d66d2cbadf ]

Older machines don't have the firmware feature that enables the code
this test is testing. Skip the test if the sysfs directory doesn't
exist. Also use the FAIL_IF() macro to provide more verbose error
reporting if an error is encountered.

Fixes: 57201d657eb7 ("selftest/powerpc: Add PAPR sysfs attributes sniff test")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220619233103.2666171-1-mpe@ellerman.id.au
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
.../powerpc/papr_attributes/attr_test.c | 30 +++++++++++--------
1 file changed, 18 insertions(+), 12 deletions(-)

diff --git a/tools/testing/selftests/powerpc/papr_attributes/attr_test.c b/tools/testing/selftests/powerpc/papr_attributes/attr_test.c
index bab0dc06e90b..9b655be641c9 100644
--- a/tools/testing/selftests/powerpc/papr_attributes/attr_test.c
+++ b/tools/testing/selftests/powerpc/papr_attributes/attr_test.c
@@ -7,6 +7,7 @@
* Copyright 2022, Pratik Rajesh Sampat, IBM Corp.
*/

+#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <dirent.h>
@@ -32,7 +33,7 @@ enum type {
NUM_VAL
};

-int value_type(int id)
+static int value_type(int id)
{
int val_type;

@@ -54,15 +55,21 @@ int value_type(int id)
return val_type;
}

-int verify_energy_info(void)
+static int verify_energy_info(void)
{
const char *path = "/sys/firmware/papr/energy_scale_info";
struct dirent *entry;
struct stat s;
DIR *dirp;

- if (stat(path, &s) || !S_ISDIR(s.st_mode))
- return -1;
+ errno = 0;
+ if (stat(path, &s)) {
+ SKIP_IF(errno == ENOENT);
+ FAIL_IF(errno);
+ }
+
+ FAIL_IF(!S_ISDIR(s.st_mode));
+
dirp = opendir(path);

while ((entry = readdir(dirp)) != NULL) {
@@ -76,25 +83,24 @@ int verify_energy_info(void)

id = atoi(entry->d_name);
attr_type = value_type(id);
- if (attr_type == INVALID)
- return -1;
+ FAIL_IF(attr_type == INVALID);

/* Check if the files exist and have data in them */
sprintf(file_name, "%s/%d/desc", path, id);
f = fopen(file_name, "r");
- if (!f || fgetc(f) == EOF)
- return -1;
+ FAIL_IF(!f);
+ FAIL_IF(fgetc(f) == EOF);

sprintf(file_name, "%s/%d/value", path, id);
f = fopen(file_name, "r");
- if (!f || fgetc(f) == EOF)
- return -1;
+ FAIL_IF(!f);
+ FAIL_IF(fgetc(f) == EOF);

if (attr_type == STR_VAL) {
sprintf(file_name, "%s/%d/value_desc", path, id);
f = fopen(file_name, "r");
- if (!f || fgetc(f) == EOF)
- return -1;
+ FAIL_IF(!f);
+ FAIL_IF(fgetc(f) == EOF);
}
}

--
2.35.1