[Intel-wired-lan] [PATCH] iavf: Fix hang during reboot/shutdown
Jakub Kicinski
kuba at kernel.org
Thu Mar 17 16:11:04 UTC 2022
On Thu, 17 Mar 2022 11:45:24 +0100 Ivan Vecera wrote:
> Recent commit 974578017fc1 ("iavf: Add waiting so the port is
> initialized in remove") adds a wait-loop at the beginning of
> iavf_remove() to ensure that port initialization is finished
> prior unregistering net device. This causes a regression
> in reboot/shutdown scenario because in this case callback
> iavf_shutdown() is called and this callback detaches the device,
> makes it down if it is running and sets its state to __IAVF_REMOVE.
> Later shutdown callback of associated PF driver (e.g. ice_shutdown)
> is called. That callback calls among other things sriov_disable()
> that calls indirectly iavf_remove() (see stack trace below).
> As the adapter state is already __IAVF_REMOVE then the mentioned
> loop is end-less and shutdown process hangs.
Tony, Jesse, looks like the regression is from 5.17-rc6, should
I take this directly so it makes 5.17 final?
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