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Re: [PATCH] gpio: pca953x: fix an incorrect lockdep warning

From Bartosz Golaszewski <bgolaszewski@baylibre.com>
Newsgroups linux.kernel
Subject Re: [PATCH] gpio: pca953x: fix an incorrect lockdep warning
Date 2016-09-16 16:50 +0200
Message-ID <si2CK-608-15@gated-at.bofh.it> (permalink)
References <si29H-5Pq-13@gated-at.bofh.it> <si2CK-608-17@gated-at.bofh.it>
Organization linux.* mail to news gateway

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2016-09-16 16:33 GMT+02:00 Peter Rosin <peda@axentia.se>:
>
> If this is to be fixed this even for crazy setups where the pattern is
> repeated for more levels, you can look into drivers/i2c/i2c-core.c
> i2c_adapter_depth() and how it's used (i.e. for this exact purpose).
> Maybe it's time to export that function?
>

Hi Peter,

thanks for the heads up. I was not aware of this function. Lockdep
only allows us to specify up to 8 subclasses, but I can't possibly
imagine a setup where more would be needed. I'll submit a series
exporting this function and using it in pca953x.

Best regards,
Bartosz Golaszewski

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Thread

[PATCH] gpio: pca953x: fix an incorrect lockdep warning Bartosz Golaszewski <bgolaszewski@baylibre.com> - 2016-09-16 16:20 +0200
  Re: [PATCH] gpio: pca953x: fix an incorrect lockdep warning Bartosz Golaszewski <bgolaszewski@baylibre.com> - 2016-09-16 16:50 +0200
  Re: [PATCH] gpio: pca953x: fix an incorrect lockdep warning Bartosz Golaszewski <bgolaszewski@baylibre.com> - 2016-09-16 18:10 +0200

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