read() does not return -EAGAIN
read() returns -1 and the errno value needs to be checked for -EAGAIN
Signed-off-by: Peter Meerwald <pmeerw@xxxxxxxxxx>
---
drivers/staging/iio/Documentation/generic_buffer.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/staging/iio/Documentation/generic_buffer.c b/drivers/staging/iio/Documentation/generic_buffer.c
index 40d0eca..044ea19 100644
--- a/drivers/staging/iio/Documentation/generic_buffer.c
+++ b/drivers/staging/iio/Documentation/generic_buffer.c
@@ -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,
--
1.9.1
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