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Message-ID: <9370a5a7-6050-47f6-a3db-e042461a383b@intel.com>
Date: Thu, 28 Dec 2023 16:33:43 +0800
From: Yi Liu <yi.l.liu@...el.com>
To: "Tian, Kevin" <kevin.tian@...el.com>, "joro@...tes.org" <joro@...tes.org>,
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Subject: Re: [PATCH v8 07/10] iommu/vt-d: Allow qi_submit_sync() to return the
QI faults
On 2023/12/28 14:17, Tian, Kevin wrote:
>> From: Liu, Yi L <yi.l.liu@...el.com>
>> Sent: Thursday, December 28, 2023 12:14 AM
>>
>> @@ -1376,6 +1383,8 @@ int qi_submit_sync(struct intel_iommu *iommu,
>> struct qi_desc *desc,
>>
>> restart:
>> rc = 0;
>> + if (fault)
>> + *fault = 0;
>
> move it to right before the loop of qi_check_fault()
ok.
>>
>> raw_spin_lock_irqsave(&qi->q_lock, flags);
>> /*
>> @@ -1430,7 +1439,7 @@ int qi_submit_sync(struct intel_iommu *iommu,
>> struct qi_desc *desc,
>> * a deadlock where the interrupt context can wait
>> indefinitely
>> * for free slots in the queue.
>> */
>> - rc = qi_check_fault(iommu, index, wait_index);
>> + rc = qi_check_fault(iommu, index, wait_index, fault);
>> if (rc)
>> break;
>
> and as replied in another thread let's change qi_check_fault to return
> -ETIMEDOUT to break the restart loop when fault pointer is valid.
sure.
--
Regards,
Yi Liu
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