From: Baoquan He <bhe@redhat.com>
To: Paul Menzel <pmenzel@molgen.mpg.de>
Cc: netdev@vger.kernel.org, michael.chan@broadcom.com,
davem@davemloft.net, linux-kernel@vger.kernel.org,
Dept-GELinuxNICDev@cavium.com, rasesh.mody@cavium.com,
harish.patil@cavium.com, frank@undermydesk.org,
jsr@dex.edzone.net, jroedel@suse.de, dyoung@redhat.com
Subject: Re: [PATCH v2 0/2] bnx2: Wait for in-flight DMA to complete at probe stage
Date: Mon, 14 Nov 2016 17:10:59 +0800 [thread overview]
Message-ID: <20161114091059.GB5845@x1> (raw)
In-Reply-To: <8010f40d-e7ca-8fd1-7317-f576289c112f@molgen.mpg.de>
On 11/14/16 at 09:25am, Paul Menzel wrote:
> Dear Baoquan,
>
> On 11/13/16 06:01, Baoquan He wrote:
> > 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.
>
> thank you for posting the updated series. Could you please resend a v3 with
> stable@vger.kernel.org added [1]?
I can add it like:
Cc: <stable@vger.kernel.org> # 4.8.7
Only v4.8.7, right?
Thanks
Baoquan
next prev parent reply other threads:[~2016-11-14 9:11 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-13 5:01 [PATCH v2 0/2] bnx2: Wait for in-flight DMA to complete at probe stage Baoquan He
2016-11-13 5:01 ` [PATCH v2 1/2] Revert "bnx2: Reset device during driver initialization" Baoquan He
2016-11-13 5:01 ` [PATCH v2 2/2] bnx2: Wait for in-flight DMA to complete at probe stage Baoquan He
2016-11-13 19:02 ` Michael Chan
2016-11-14 8:25 ` [PATCH v2 0/2] " Paul Menzel
2016-11-14 9:10 ` Baoquan He [this message]
2016-11-14 17:28 ` David Miller
2016-11-14 17:35 ` Paul Menzel
2016-11-14 21:21 ` David Miller
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