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Message-ID: <3ce651de-f375-176e-3435-735365dd3d8f@linux.intel.com>
Date: Wed, 22 Jun 2022 19:57:12 +0800
From: Baolu Lu <baolu.lu@...ux.intel.com>
To: Robin Murphy <robin.murphy@....com>, joro@...tes.org,
will@...nel.org
Cc: baolu.lu@...ux.intel.com, iommu@...ts.linux-foundation.org,
iommu@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] iommu: Clean up release_device checks
On 2022/6/22 15:17, Robin Murphy wrote:
> On 2022-06-22 02:36, Baolu Lu wrote:
>> On 2022/6/21 23:14, Robin Murphy wrote:
>>> Since .release_device is now called through per-device ops, any call
>>> which gets as far as a driver definitely*is* for that driver, for a
>>> device which has successfully passed .probe_device, so all the checks to
>>> that effect are now redundant and can be removed. In the same vein we
>>> can also skip freeing fwspecs which are now managed by core code.
>>
>> Does this depend on any other series? I didn't see iommu_fwspec_free()
>> called in the core code. Or I missed anything?
>
> dev_iommu_free() cleans up param->fwspec directly (see b54240ad4943).
> FWIW the plan is that iommu_fwspec_free() should eventually go away - of
> the remaining uses after this, two are in fact similarly redundant
> already, since there's also a dev_iommu_free() in the probe failure
> path, and the other two should disappear in part 2 of fixing the bus
> probing mess (wherein the of_xlate step gets pulled into
> iommu_probe_device as well, and finally works correctly again).
Yes, it is. Thanks for the explanation.
Reviewed-by: Lu Baolu <baolu.lu@...ux.intel.com>
Best regards,
baolu
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