[v2,0/2] Fix usage counter leak by adding a general sync ops

Message

Zhang Qilong Nov. 9, 2020, 3:04 p.m. UTC

In many case, we need to check return value of pm_runtime_get_sync,
but it brings a trouble to the usage counter processing. Many callers
forget to decrease the usage counter when it failed. It has been
discussed a lot[0][1]. So we add a function to deal with the usage
counter for better coding and view. Then, we replace pm_runtime_get_sync
with it in fec_main.c

Zhang Qilong (2):
  PM: runtime: Add a general runtime get sync operation to deal with
    usage counter
  net: fec: Fix reference count leak in fec series ops

 drivers/net/ethernet/freescale/fec_main.c | 12 ++++-----
 include/linux/pm_runtime.h                | 30 +++++++++++++++++++++++
 2 files changed, 35 insertions(+), 7 deletions(-)