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SubjectApplied "spi: spidev_test: Use perror() only if errno is not 0" to the spi tree
The patch

spi: spidev_test: Use perror() only if errno is not 0

has been applied to the spi tree at for-5.7

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

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and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

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From 470a072e12200576788dc622d58894609feae2d7 Mon Sep 17 00:00:00 2001
From: Tiezhu Yang <>
Date: Thu, 13 Feb 2020 12:16:07 +0800
Subject: [PATCH] spi: spidev_test: Use perror() only if errno is not 0

It is better to use perror() only if errno is not 0, it should use printf()
when errno is 0, otherwise there exists redudant ": Success".

E.g. without this patch:

$ ./spidev_test -p 1234 --input test.bin
only one of -p and --input may be selected: Success
Aborted (core dumped)

With this patch:

$ ./spidev_test -p 1234 --input test.bin
only one of -p and --input may be selected
Aborted (core dumped)

Signed-off-by: Tiezhu Yang <>
Reviewed-by: Geert Uytterhoeven <>
Signed-off-by: Mark Brown <>
tools/spi/spidev_test.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/tools/spi/spidev_test.c b/tools/spi/spidev_test.c
index 5866178cdcc9..27967dd90f8f 100644
--- a/tools/spi/spidev_test.c
+++ b/tools/spi/spidev_test.c
@@ -13,6 +13,7 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <errno.h>
#include <getopt.h>
#include <fcntl.h>
#include <time.h>
@@ -26,7 +27,11 @@

static void pabort(const char *s)
- perror(s);
+ if (errno != 0)
+ perror(s);
+ else
+ printf("%s\n", s);

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