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spi: spidev_test gives error upon 1-byte transfer

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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>
This commit is contained in:
Hector Palacios 2010-04-29 15:02:28 -07:00 committed by Grant Likely
parent dda04c7bcf
commit 95b1ed2ac7
1 changed files with 1 additions and 1 deletions
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2
Documentation/spi/spidev_test.c
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@ -58,7 +58,7 @@ static void transfer(int fd)
}; };
ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr); ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr);
if (ret == 1) if (ret < 1)
pabort("can't send spi message"); pabort("can't send spi message");
for (ret = 0; ret < ARRAY_SIZE(tx); ret++) { for (ret = 0; ret < ARRAY_SIZE(tx); ret++) {