From: Manish Chopra <[email protected]>
Date: Tue, 27 Mar 2018 06:34:41 -0700
> Since commit c5ad119fb6c09b0297446be05bd66602fa564758
> ("net: sched: pfifo_fast use skb_array") driver is exposed
> to an issue where it is hitting NULL skbs while handling TX
> completions. Driver uses mmiowb() to flush the writes to the
> doorbell bar which is a write-combined bar, however on x86
> mmiowb() does not flush the write combined buffer.
>
> This patch fixes this problem by replacing mmiowb() with wmb()
> after the write combined doorbell write so that writes are
> flushed and synchronized from more than one processor.
>
> V1->V2:
> -------
> This patch was marked as "superseded" in patchwork.
> (Not really sure for what reason).Resending it as v2.
>
> Signed-off-by: Ariel Elior <[email protected]>
> Signed-off-by: Manish Chopra <[email protected]>
Applied, thank you.
