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 08:37:16 -0700	[thread overview]
Message-ID: <ea382e7c-2436-4e82-a2b5-d5b7737b8828@acm.org> (raw)
In-Reply-To: <418bfbe4bfb3f04e805af8fa667144f148787aeb.camel@mediatek.com>

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?

Thanks,

Bart.

  reply	other threads:[~2025-07-30 15:37 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 [this message]
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)
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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