dmaengine Archive on lore.kernel.org
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From: Vinod Koul <vkoul@kernel.org>
To: Dave Jiang <dave.jiang@intel.com>
Cc: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
	dan.j.williams@intel.com, tony.luck@intel.com,
	jing.lin@intel.com, ashok.raj@intel.com,
	sanjay.k.kumar@intel.com, fenghua.yu@intel.com,
	kevin.tian@intel.com, David.Laight@aculab.com,
	dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v6 4/5] dmaengine: idxd: Clean up descriptors with fault error
Date: Mon, 5 Oct 2020 11:15:52 +0530
Message-ID: <20201005054552.GN2968@vkoul-mobl> (raw)
In-Reply-To: <47c6fa6b-8bbe-ee9d-e6e0-b27d8828a6d9@intel.com>

On 04-10-20, 21:55, Dave Jiang wrote:
> > > +static bool process_fault(struct idxd_desc *desc, u64 fault_addr)
> > > +{
> > > +	if ((u64)desc->hw == fault_addr ||
> > > +	    (u64)desc->completion == fault_addr) {
> > 
> > you are casting descriptor address and completion, I can understand
> > former, but later..? Can you explain this please
> > 
> 
> It is possible to fail on the completion writeback address if the completion
> address programmed into the descriptor is bad.

Okay thanks for clarifying, maybe would help to add a comment.

-- 
~Vinod

  reply index

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-24 18:00 [PATCH v6 0/5] Add shared workqueue support for idxd driver Dave Jiang
2020-09-24 18:00 ` [PATCH v6 1/5] x86/asm: Carve out a generic movdir64b() helper for general usage Dave Jiang
2020-09-24 18:33   ` Borislav Petkov
2020-09-24 18:00 ` [PATCH v6 2/5] x86/asm: Add enqcmds() to support ENQCMDS instruction Dave Jiang
2020-09-24 18:58   ` Borislav Petkov
2020-09-24 21:14     ` Dave Jiang
2020-09-24 22:09   ` David Laight
2020-09-24 18:00 ` [PATCH v6 3/5] dmaengine: idxd: Add shared workqueue support Dave Jiang
2020-10-05  4:35   ` Vinod Koul
2020-09-24 18:00 ` [PATCH v6 4/5] dmaengine: idxd: Clean up descriptors with fault error Dave Jiang
2020-10-05  4:42   ` Vinod Koul
2020-10-05  4:55     ` Dave Jiang
2020-10-05  5:45       ` Vinod Koul [this message]
2020-09-24 18:00 ` [PATCH v6 5/5] dmaengine: idxd: Add ABI documentation for shared wq Dave Jiang
2020-10-05  4:43   ` Vinod Koul
2020-09-24 21:32 ` [PATCH v6 0/5] Add shared workqueue support for idxd driver Dave Jiang
2020-09-24 21:51   ` Borislav Petkov
2020-09-24 22:05     ` Dave Jiang
2020-09-30 22:19     ` Dave Jiang
2020-10-01  4:29       ` Vinod Koul
2020-10-01  7:30         ` Borislav Petkov
2020-10-01 12:18         ` Jiang, Dave

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