diff options
| -rw-r--r-- | drivers/ptp/ptp_ocp.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/ptp/ptp_ocp.c b/drivers/ptp/ptp_ocp.c index a5c363252986..eeebe4d149f7 100644 --- a/drivers/ptp/ptp_ocp.c +++ b/drivers/ptp/ptp_ocp.c @@ -3430,6 +3430,12 @@ ptp_ocp_tty_show(struct device *dev, struct device_attribute *attr, char *buf) struct dev_ext_attribute *ea = to_ext_attr(attr); struct ptp_ocp *bp = dev_get_drvdata(dev); + /* + * NOTE: This output does not include a trailing newline for backward + * compatibility. Existing userspace software uses this value directly + * as a device path (e.g., "/dev/ttyS4"), and adding a newline would + * break those applications. Do not add a newline to this output. + */ return sysfs_emit(buf, "ttyS%d", bp->port[(uintptr_t)ea->var].line); } |