From 95b1ed2ac7ffe3205afc6f5a20320fbdb984da92 Mon Sep 17 00:00:00 2001
From: Hector Palacios <hector.palacios@digi.com>
Date: Thu, 29 Apr 2010 15:02:28 -0700
Subject: [PATCH] spi: spidev_test gives error upon 1-byte transfer
The sample application spidev_test.c is using SPI_IOC_MESSAGE ioctl to do
an SPI transfer. This ioctl returns the number of bytes successfully
transmitted or a negative error code upon erroneous completion. The
application however is returning an error if the result of the ioclt if
the return value is 1. This makes the application to fail upon 1-byte
length transfers.
Signed-off-by: Hector Palacios <hector.palacios@digi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
---
Documentation/spi/spidev_test.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/Documentation/spi/spidev_test.c b/Documentation/spi/spidev_test.c
index 10abd3773e49..16feda901469 100644
--- a/Documentation/spi/spidev_test.c
+++ b/Documentation/spi/spidev_test.c
@@ -58,7 +58,7 @@ static void transfer(int fd)
};
ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr);
- if (ret == 1)
+ if (ret < 1)
pabort("can't send spi message");
for (ret = 0; ret < ARRAY_SIZE(tx); ret++) {
--
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