netdev - Re: [PATCH v2 0/2] bnx2: Wait for in-flight DMA to complete at probe stage

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Date:   Mon, 14 Nov 2016 16:21:37 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     bhe@...hat.com
Cc:     netdev@...r.kernel.org, michael.chan@...adcom.com,
        linux-kernel@...r.kernel.org, Dept-GELinuxNICDev@...ium.com,
        rasesh.mody@...ium.com, harish.patil@...ium.com,
        frank@...ermydesk.org, jsr@....edzone.net, pmenzel@...gen.mpg.de,
        jroedel@...e.de, dyoung@...hat.com
Subject: Re: [PATCH v2 0/2] bnx2: Wait for in-flight DMA to complete at
 probe stage

From: Baoquan He <bhe@...hat.com>
Date: Sun, 13 Nov 2016 13:01:31 +0800

> This is v2 post.
> 
> In commit 3e1be7a ("bnx2: Reset device during driver initialization"),
> firmware requesting code was moved from open stage to probe stage.
> The reason is in kdump kernel hardware iommu need device be reset in
> driver probe stage, otherwise those in-flight DMA from 1st kernel
> will continue going and look up into the newly created io-page tables.
> However bnx2 chip resetting involves firmware requesting issue, that
> need be done in open stage. 
> 
> Michale Chan suggested we can just wait for the old in-flight DMA to
> complete at probe stage, then though without device resetting, we
> don't need to worry the old in-flight DMA could continue looking up 
> the newly created io-page tables.
> 
> v1->v2:
>     Michael suggested to wait for the in-flight DMA to complete at probe
>     stage. So give up the old method of trying to reset chip at probe
>     stage, take the new way accordingly.

Series applied and queued up for -stable, thanks.