From: Jakub Kicinski <[email protected]>
Date: Tue, 9 Jan 2018 18:14:28 -0800
> The link state and exception interrupts may be masked when we probe.
> The firmware should in theory prevent sending (and automasking) those
> interrupts if the device is disabled, but if my reading of the FW code
> is correct there are firmwares out there with race conditions in this
> area. The interrupt may also be masked if previous driver which used
> the device was malfunctioning and we didn't load the FW (there is no
> other good way to comprehensively reset the PF).
>
> Note that FW unmasks the data interrupts by itself when vNIC is
> enabled, such helpful operation is not performed for LSC/EXN interrupts.
>
> Always unmask the auxiliary interrupts after request_irq(). On the
> remove path add missing PCI write flush before free_irq().
>
> Fixes: 4c3523623dc0 ("net: add driver for Netronome NFP4000/NFP6000 NIC VFs")
> Signed-off-by: Jakub Kicinski <[email protected]>
> Reviewed-by: Dirk van der Merwe <[email protected]>
Applied and queued up for -stable, thanks.
