PTP core was creating some attributes, such as "period" and "fifo", and the entire "pins" attribute group, after creating class deevice, which creates a race for userspace: uevent may arrive before all attributes are created.
This series of patches switches PTP to use is_visible() to control visibility of attributes in a group, and device_create_with_groups() to ensure that attributes are created before we notify userspace of a new device. v2: - added Richard's acked-by to patch #1 - removed use of kmalloc_array in favor of kcalloc in patch #2 at Richard's request - added a cover letter v1: - initial patch set Dmitry Torokhov (4): ptp: do not explicitly set drvdata in ptp_clock_register() ptp: use kcalloc when allocating arrays ptp: use is_visible method to hide unused attributes ptp: create "pins" together with the rest of attributes drivers/ptp/ptp_clock.c | 22 +++--- drivers/ptp/ptp_private.h | 7 +- drivers/ptp/ptp_sysfs.c | 167 ++++++++++++++++++---------------------------- 3 files changed, 80 insertions(+), 116 deletions(-) Thanks. -- Dmitry
