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serial.c: Re-enable serial_read() error reporting. 

libserialport now returns 0 (not SP_ERR_FAIL) as return value when a
non-blocking read would return EAGAIN.

This fixes bug #188.
This commit is contained in:
Uwe Hermann 2013-11-26 16:29:43 +01:00
parent 25b66c3c61
commit c4d85a4026
1 changed files with 7 additions and 8 deletions
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15
hardware/common/serial.c
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@ -234,7 +234,7 @@ SR_PRIV int serial_read(struct sr_serial_dev_inst *serial, void *buf,
size_t count)
{
ssize_t ret;
//char *error;
char *error;
if (!serial) {
sr_dbg("Invalid serial port.");
@ -253,15 +253,14 @@ SR_PRIV int serial_read(struct sr_serial_dev_inst *serial, void *buf,
case SP_ERR_ARG:
sr_err("Attempted serial port read with invalid arguments.");
return SR_ERR_ARG;
// Temporarily disabled, will come back later.
// case SP_ERR_FAIL:
// error = sp_last_error_message();
// sr_err("Read error: %s.", error);
// sp_free_error_message(error);
// return SR_ERR;
case SP_ERR_FAIL:
error = sp_last_error_message();
sr_err("Read error: %s.", error);
sp_free_error_message(error);
return SR_ERR;
}
if (ret >= 0)
if (ret > 0)
sr_spew("Read %d/%d bytes (fd %d).", ret, count, serial->fd);
return ret;