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staging:iio: Fix error handling in generic_buffer example

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read() does not return -EAGAIN
read() returns -1 and the errno value needs to be checked for -EAGAIN

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Peter Meerwald 2014-12-06 06:00:00 +00:00 committed by Jonathan Cameron
parent 723db16724
commit 97b603a4e9
1 changed files with 6 additions and 3 deletions
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9
drivers/staging/iio/Documentation/generic_buffer.c
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@ -305,9 +305,12 @@ int main(int argc, char **argv)
read_size = read(fp,
data,
toread*scan_size);
if (read_size == -EAGAIN) {
printf("nothing available\n");
continue;
if (read_size < 0) {
if (errno == -EAGAIN) {
printf("nothing available\n");
continue;
} else
break;
}
for (i = 0; i < read_size/scan_size; i++)
process_scan(data + scan_size*i,