Linux SCSI subsystem development
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From: "Peter Wang (王信友)" <peter.wang@mediatek.com>
To: "beanhuo@micron.com" <beanhuo@micron.com>,
	"avri.altman@wdc.com" <avri.altman@wdc.com>,
	"neil.armstrong@linaro.org" <neil.armstrong@linaro.org>,
	"quic_cang@quicinc.com" <quic_cang@quicinc.com>,
	"quic_nitirawa@quicinc.com" <quic_nitirawa@quicinc.com>,
	"quic_nguyenb@quicinc.com" <quic_nguyenb@quicinc.com>,
	"bvanassche@acm.org" <bvanassche@acm.org>,
	"quic_ziqichen@quicinc.com" <quic_ziqichen@quicinc.com>,
	"luca.weiss@fairphone.com" <luca.weiss@fairphone.com>,
	"konrad.dybcio@oss.qualcomm.com" <konrad.dybcio@oss.qualcomm.com>,
	"junwoo80.lee@samsung.com" <junwoo80.lee@samsung.com>,
	"mani@kernel.org" <mani@kernel.org>,
	"martin.petersen@oracle.com" <martin.petersen@oracle.com>,
	"quic_rampraka@quicinc.com" <quic_rampraka@quicinc.com>
Cc: "linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
	"Tze-nan Wu (吳澤南)" <Tze-nan.Wu@mediatek.com>,
	"linux-arm-msm@vger.kernel.org" <linux-arm-msm@vger.kernel.org>,
	"manivannan.sadhasivam@linaro.org"
	<manivannan.sadhasivam@linaro.org>,
	"alim.akhtar@samsung.com" <alim.akhtar@samsung.com>,
	"James.Bottomley@HansenPartnership.com"
	<James.Bottomley@HansenPartnership.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v4] scsi: ufs: core: Don't perform UFS clkscale if host asyn scan in progress
Date: Mon, 4 Aug 2025 09:41:13 +0000	[thread overview]
Message-ID: <faef2c814745ff7d26f39a6efbe090bdf04cae64.camel@mediatek.com> (raw)
In-Reply-To: <8a918075-627b-4707-94db-cc86b2f7a5e4@quicinc.com>

On Mon, 2025-08-04 at 15:54 +0800, Ziqi Chen wrote:
> 
> 
> Hi  Peter && Bart,
> 
> How do you think about using
> 
> if (!mutex_trylock(&hba->host->scan_mutex))
>         return -EAGAIN;
> 
> instead of
> 
> mutex_lock(&hba->host->scan_mutex);
> 
> But this way will cause one line print of devfreq failed.
> 
> BRs
> Ziqi
> 


Hi Ziqi,

I think this might have a chance to resolve this circular lockdep
issue.
Mediatek will test it internally and then provide feedback on the
results.

Thanks.
Peter

  reply	other threads:[~2025-08-04  9:41 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-05-22  8:12 [PATCH v4] scsi: ufs: core: Don't perform UFS clkscale if host asyn scan in progress Ziqi Chen
2025-05-27 21:24 ` Bart Van Assche
2025-05-28  1:58 ` Martin K. Petersen
2025-06-03  2:35 ` Martin K. Petersen
2025-07-25  9:13 ` Peter Wang (王信友)
2025-07-25 14:54   ` Bart Van Assche
2025-07-28  6:34     ` Peter Wang (王信友)
2025-07-29  3:02       ` Ziqi Chen
2025-07-30 12:55         ` Peter Wang (王信友)
2025-07-30 15:37           ` Bart Van Assche
2025-07-30 15:42             ` Bart Van Assche
2025-07-30 15:50           ` Bart Van Assche
2025-08-04  7:54             ` Ziqi Chen
2025-08-04  9:41               ` Peter Wang (王信友) [this message]
2025-08-04 12:43               ` Peter Wang (王信友)
2025-08-05  6:03                 ` Ziqi Chen
2025-08-05  7:39                   ` Peter Wang (王信友)

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