Messages in this thread | | | Subject | Re: [PATCH v0 linux master] i2c/busses: Avoid i2c interrupt status clear race condition. | From | Benjamin Herrenschmidt <> | Date | Thu, 30 Apr 2020 20:55:48 +1000 |
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On Wed, 2020-04-29 at 11:03 +0200, Wolfram Sang wrote: > > And is there maybe a Fixes: tag for it? > > [Ryan Chen] Yes it is a fix patch. > > I meant this (from submitting-patches.rst):
It fixes the original implementation of the driver basically. It's just a classic posted-write fix. The write to clear the pending interrupt is asynchronous, so you can get spurrious ones if you return from the handler before it has percolated to the HW.
I assume it's just more visible on the 2600 because of the cores are significantly faster but the IO bus is still as dumb.
Ryan: You could always add a Fixed-by: tag that specifies the commit that added the initial driver...
Cheers, Ben.
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