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* [PATCH 0/2] drivers: base: Add tests showing devm handling inconsistencies
@ 2023-03-29 19:38 Maxime Ripard
  2023-03-29 19:38 ` [PATCH 1/2] drivers: base: Add basic devm tests for root devices Maxime Ripard
                   ` (3 more replies)
  0 siblings, 4 replies; 8+ messages in thread
From: Maxime Ripard @ 2023-03-29 19:38 UTC (permalink / raw)
  To: Greg Kroah-Hartman, Rafael J. Wysocki
  Cc: Brendan Higgins, David Gow, linux-kselftest, kunit-dev,
	linux-kernel, Maxime Ripard

Hi,

This follows the discussion here:
https://lore.kernel.org/linux-kselftest/20230324123157.bbwvfq4gsxnlnfwb@houat/

This shows a couple of inconsistencies with regard to how device-managed
resources are cleaned up. Basically, devm resources will only be cleaned up
if the device is attached to a bus and bound to a driver. Failing any of
these cases, a call to device_unregister will not end up in the devm
resources being released.

We had to work around it in DRM to provide helpers to create a device for
kunit tests, but the current discussion around creating similar, generic,
helpers for kunit resumed interest in fixing this.

This can be tested using the command:
./tools/testing/kunit/kunit.py run --kunitconfig=drivers/base/test/

Let me know what you think,
Maxime

Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
Maxime Ripard (2):
      drivers: base: Add basic devm tests for root devices
      drivers: base: Add basic devm tests for platform devices

 drivers/base/test/.kunitconfig           |   2 +
 drivers/base/test/Kconfig                |   4 +
 drivers/base/test/Makefile               |   3 +
 drivers/base/test/platform-device-test.c | 278 +++++++++++++++++++++++++++++++
 drivers/base/test/root-device-test.c     | 120 +++++++++++++
 5 files changed, 407 insertions(+)
---
base-commit: a6faf7ea9fcb7267d06116d4188947f26e00e57e
change-id: 20230329-kunit-devm-inconsistencies-test-5e5a7d01e60d

Best regards,
-- 
Maxime Ripard <maxime@cerno.tech>


^ permalink raw reply	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2023-06-03 14:44 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2023-03-29 19:38 [PATCH 0/2] drivers: base: Add tests showing devm handling inconsistencies Maxime Ripard
2023-03-29 19:38 ` [PATCH 1/2] drivers: base: Add basic devm tests for root devices Maxime Ripard
2023-03-29 21:43   ` kernel test robot
2023-03-29 19:38 ` [PATCH 2/2] drivers: base: Add basic devm tests for platform devices Maxime Ripard
2023-04-17 16:12 ` [PATCH 0/2] drivers: base: Add tests showing devm handling inconsistencies Maxime Ripard
     [not found]   ` <2023053137-leggings-grumbly-a33a@gregkh>
2023-06-02 15:27     ` Maxime Ripard
2023-06-03 14:44       ` Greg Kroah-Hartman
2023-05-11  8:44 ` Maxime Ripard

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