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From: "Peter Wang (王信友)" <peter.wang@mediatek.com>
To: "bvanassche@acm.org" <bvanassche@acm.org>,
	"martin.petersen@oracle.com" <martin.petersen@oracle.com>
Cc: "beanhuo@micron.com" <beanhuo@micron.com>,
	"vamshigajjela@google.com" <vamshigajjela@google.com>,
	"chu.stanley@gmail.com" <chu.stanley@gmail.com>,
	"alok.a.tiwari@oracle.com" <alok.a.tiwari@oracle.com>,
	"quic_nguyenb@quicinc.com" <quic_nguyenb@quicinc.com>,
	"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
	"chenyuan0y@gmail.com" <chenyuan0y@gmail.com>,
	"alim.akhtar@samsung.com" <alim.akhtar@samsung.com>,
	"ping.gao@samsung.com" <ping.gao@samsung.com>,
	"rafael.j.wysocki@intel.com" <rafael.j.wysocki@intel.com>,
	"avri.altman@sandisk.com" <avri.altman@sandisk.com>,
	"James.Bottomley@HansenPartnership.com"
	<James.Bottomley@HansenPartnership.com>,
	"can.guo@oss.qualcomm.com" <can.guo@oss.qualcomm.com>,
	"adrian.hunter@intel.com" <adrian.hunter@intel.com>
Subject: Re: [PATCH 1/3] ufs: core: Fix ufshcd_mcq_force_compl_one()
Date: Tue, 31 Mar 2026 09:41:53 +0000	[thread overview]
Message-ID: <4685d17dbf09397aef70c2e2b84ee13f1c48d4cd.camel@mediatek.com> (raw)
In-Reply-To: <20260330183311.1941942-2-bvanassche@acm.org>

On Mon, 2026-03-30 at 11:33 -0700, Bart Van Assche wrote:
> There are two issues with the code in
> ufshcd_mcq_compl_all_cqes_lock():
> - The completion queue is processed without checking first whether it
> is
>   empty.
> 

Hi Bart,

Does ufshcd_mcq_compl_all_cqes_lock not check whether the CQ
is empty because there could be cases where the CQ is empty
but there are still ongoing requests?


> 
> @@ -5855,7 +5855,7 @@ static bool ufshcd_mcq_force_compl_one(struct
> request *rq, void *priv)
>         if (blk_mq_is_reserved_rq(rq) || !hwq)
>                 return true;
> 
> -       ufshcd_mcq_compl_all_cqes_lock(hba, hwq);
> +       ufshcd_mcq_poll_cqe_lock(hba, hwq);
> 
> 

Since ufshcd_mcq_force_compl_one and ufshcd_mcq_compl_one
are very similar, would it be possible to merge them into 
one function, with a parameter to handle the force completion
case?

Thanks.
Peter


  reply	other threads:[~2026-03-31  9:42 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-03-30 18:33 [PATCH 0/3] Reduce interrupt latency Bart Van Assche
2026-03-30 18:33 ` [PATCH 1/3] ufs: core: Fix ufshcd_mcq_force_compl_one() Bart Van Assche
2026-03-31  9:41   ` Peter Wang (王信友) [this message]
2026-03-31 19:29     ` Bart Van Assche
2026-04-01 13:10       ` Peter Wang (王信友)
2026-04-01 15:51         ` Bart Van Assche
2026-04-02  7:19           ` Peter Wang (王信友)
2026-03-30 18:33 ` [PATCH 2/3] ufs: core: Introduce ufshcd_mcq_poll_cqe_lock_n() Bart Van Assche
2026-03-31  9:43   ` Peter Wang (王信友)
2026-03-31 19:31     ` Bart Van Assche
2026-04-01 13:11       ` Peter Wang (王信友)
2026-04-01 15:51         ` Bart Van Assche
2026-04-02  7:20   ` Peter Wang (王信友)
2026-03-30 18:33 ` [PATCH 3/3] ufs: qcom: Reduce interrupt latency Bart Van Assche
2026-03-31  7:09   ` Manivannan Sadhasivam
2026-03-31 19:44     ` Bart Van Assche
2026-04-04  3:11       ` Manivannan Sadhasivam
2026-04-06 16:02         ` Bart Van Assche
2026-03-30 18:36 ` [PATCH 0/3] " Bart Van Assche
2026-03-31  2:01   ` Can Guo
2026-04-07  8:20     ` Xiaosen

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