On Thu, Apr 22, 2021 at 1:37 AM Luca Ceresoli <luca@xxxxxxxxxxxxxxxx> wrote:
Hello,
despite having been searching for documentation I couldn't find out the
exact and detailed difference between the .shutdown() and .remove()
calls in struct device_driver.
so, I'll start by saying I know next to nothing, but most of what you said sounds good
>From the above it looks like the shutdown() actions must be a subset of
remove() actions.
but subset is a bit vague.
theres 2 dimensions to think about.
lifetime - shutdown/startup is surely the longer window, add/remove happen within that
hierarchy - subsystems must be ready to handle add / remove
fwiw, I 'grepped' (with ack), it shows a few drivers with both functions,
many others with just remove
you could see in detail what the difference is.
$> ack '(\.remove|\.shutdown)\b' drivers/
drivers/rtc/rtc-twl.c
645: .remove = twl_rtc_remove,
646: .shutdown = twl_rtc_shutdown,
645: .remove = twl_rtc_remove,
646: .shutdown = twl_rtc_shutdown,
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