From: Jakub Kicinski <k...@kernel.org> Date: Wed, 26 Aug 2020 12:40:05 -0700
> Rob run into crashes when using XDP on bnxt. Upon investigation > it turns out that during driver reconfig irq core produces > a warning message when IRQs are requested. This triggers netpoll, > which in turn accesses uninitialized driver state. Same crash can > also be triggered on this platform by changing the number of rings. > > Looks like we have two missing pieces here, netif_napi_add() has > to make sure we start out with netpoll blocked. The driver also > has to be more careful about when napi gets enabled. > > Tested XDP and channel count changes, the warning message no longer > causes a crash. Not sure if the memory barriers added in patch 1 > are necessary, but it seems we should have them. Series applied and queued up for -stable, thanks Jakub.
