Linux SCSI subsystem development
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From: Bart Van Assche <bvanassche@acm.org>
To: "Peter Wang (王信友)" <peter.wang@mediatek.com>,
	"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>,
	"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>,
	"mani@kernel.org" <mani@kernel.org>,
	"martin.petersen@oracle.com" <martin.petersen@oracle.com>,
	"quic_rampraka@quicinc.com" <quic_rampraka@quicinc.com>,
	"junwoo80.lee@samsung.com" <junwoo80.lee@samsung.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: Wed, 30 Jul 2025 08:42:15 -0700	[thread overview]
Message-ID: <3ad6282f-bb41-42c2-9dda-337a0e0be68a@acm.org> (raw)
In-Reply-To: <ea382e7c-2436-4e82-a2b5-d5b7737b8828@acm.org>

On 7/30/25 8:37 AM, Bart Van Assche wrote:
> On 7/30/25 5:55 AM, Peter Wang (王信友) wrote:
>> However, in theory, this issue should still be solvable
>> without using a lock.
>> Another idea is to only start ufshcd_devfreq_init
>> when shost->async_scan = 0.
> 
> Does the lockdep complaint mentioned in this email thread occur on
> multiple platforms or only on MediaTek platforms? I don't see any
> lockdep complaints with Martin's SCSI for-next branch on my
> development platform. If this warning only occurs on MediaTek
> platforms, why to modify the UFSHCI core driver to eliminate this
> lockdep complaint?

Answering my own question: clock scaling is not enabled on my
development platform and that's why I'm not seeing this lockdep
complaint.

Bart.

  reply	other threads:[~2025-07-30 15:42 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 [this message]
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)
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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