linux-kernel - Re: [PATCH v2 05/12] iommu: Change the return value of dev_iommu

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Date:   Thu, 10 Aug 2023 10:30:28 +0800
From:   Baolu Lu <baolu.lu@...ux.intel.com>
To:     Jason Gunthorpe <jgg@...pe.ca>
Cc:     baolu.lu@...ux.intel.com, Joerg Roedel <joro@...tes.org>,
        Will Deacon <will@...nel.org>,
        Robin Murphy <robin.murphy@....com>,
        Kevin Tian <kevin.tian@...el.com>,
        Jean-Philippe Brucker <jean-philippe@...aro.org>,
        Nicolin Chen <nicolinc@...dia.com>,
        Yi Liu <yi.l.liu@...el.com>,
        Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        iommu@...ts.linux.dev, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 05/12] iommu: Change the return value of
 dev_iommu_get()

On 2023/8/10 0:58, Jason Gunthorpe wrote:
> On Thu, Jul 27, 2023 at 01:48:30PM +0800, Lu Baolu wrote:
>> Make dev_iommu_get() return 0 for success and error numbers for failure.
>> This will make the code neat and readable. No functionality changes.
>>
>> Reviewed-by: Jacob Pan<jacob.jun.pan@...ux.intel.com>
>> Signed-off-by: Lu Baolu<baolu.lu@...ux.intel.com>
>> ---
>>   drivers/iommu/iommu.c | 19 +++++++++++--------
>>   1 file changed, 11 insertions(+), 8 deletions(-)
>>
>> diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
>> index 00309f66153b..4ba3bb692993 100644
>> --- a/drivers/iommu/iommu.c
>> +++ b/drivers/iommu/iommu.c
>> @@ -290,20 +290,20 @@ void iommu_device_unregister(struct iommu_device *iommu)
>>   }
>>   EXPORT_SYMBOL_GPL(iommu_device_unregister);
> It could probably use a nicer name too?
> 
> iommu_alloc_dev_iommu() ?
> 
> Also with Joerg's current tree we can add a device_lock_assert() to
> this function, from what I can tell.

Sure. Will update them in the next version.

Best regards,
baolu