Messages in this thread | | | Date | Wed, 4 May 2016 18:04:45 +0300 | Subject | Re: [RFC PATCH v2 06/10] spi: add support for ACPI reconfigure notifications | From | Octavian Purdila <> |
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On Tue, May 3, 2016 at 3:19 PM, Mark Brown <broonie@kernel.org> wrote: > On Thu, Apr 28, 2016 at 10:37:57PM +0300, Octavian Purdila wrote: >> On Thu, Apr 28, 2016 at 8:42 PM, Mark Brown <broonie@kernel.org> wrote: > >> > There's more code here now than I remember but this all looks *really* >> > close to the DT code except for the OF_POPULATED flag that we set when >> > things are instantiated in DT. The duplication seems bad but the fact >> > that we're missing the flag worries me... do we have guarantees that >> > ACPI won't double register? > >> We use the adev->flags.visited to check when a device has been already >> enumerated, and we skip registering a new SPI slave in that case. > > OK, but the fact that I need to know that isn't exactly thrilling - > that's really the issue with the not quite duplication here. It's not > just if the code works but also the maintainability.
I agree that this is unfortunate. I could not find a common path for both device tree and ACPI. Perhaps when we remove of_node from struct device and move to fwnode we could remove some duplication.
I can add a couple of comments around acpi_device_enumerated() and adev->flags.visited = true; to make it clear that we won't double enumerate. Will that help?
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