[PATCH v6 0/4] driver core: add probe error check helper
a.hajda at samsung.com
Fri Jun 26 06:00:59 EDT 2020
Thanks for multiple comments.
Changes since v5:
- removed patch adding macro, dev_err_probe(dev, PTR_ERR(ptr), ...) should be used instead,
- added dev_dbg logging in case of -EPROBE_DEFER,
- renamed functions and vars according to comments,
- extended docs,
Original message (with small adjustments):
Recently I took some time to re-check error handling in drivers probe code,
and I have noticed that number of incorrect resource acquisition error handling
increased and there are no other propositions which can cure the situation.
So I have decided to resend my old proposition of probe_err helper which should
simplify resource acquisition error handling, it also extend it with adding defer
probe reason to devices_deferred debugfs property, which should improve debugging
experience for developers/testers.
I have also added two patches showing usage and benefits of the helper.
My dirty/ad-hoc cocci scripts shows that this helper can be used in at least 2700 places
saving about 3500 lines of code.
Andrzej Hajda (4):
driver core: add device probe log helper
driver core: add deferring probe reason to devices_deferred property
drm/bridge/sii8620: fix resource acquisition error handling
drm/bridge: lvds-codec: simplify error handling
drivers/base/base.h | 3 ++
drivers/base/core.c | 46 ++++++++++++++++++++++++++++
drivers/base/dd.c | 23 +++++++++++++-
drivers/gpu/drm/bridge/lvds-codec.c | 10 ++----
drivers/gpu/drm/bridge/sil-sii8620.c | 21 ++++++-------
include/linux/device.h | 3 ++
6 files changed, 86 insertions(+), 20 deletions(-)
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