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From: "Peter Wang (王信友)" <peter.wang@mediatek.com>
To: "linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
	"jejb@linux.ibm.com" <jejb@linux.ibm.com>,
	"bvanassche@acm.org" <bvanassche@acm.org>,
	"avri.altman@wdc.com" <avri.altman@wdc.com>,
	"martin.petersen@oracle.com" <martin.petersen@oracle.com>,
	"alim.akhtar@samsung.com" <alim.akhtar@samsung.com>
Cc: "Alice Chao (趙珮均)" <Alice.Chao@mediatek.com>,
	"CC Chou (周志杰)" <cc.chou@mediatek.com>,
	"Eddie Huang (黃智傑)" <eddie.huang@mediatek.com>,
	"Ed Tsai (蔡宗軒)" <Ed.Tsai@mediatek.com>,
	wsd_upstream <wsd_upstream@mediatek.com>,
	"Chaotian Jing (井朝天)" <Chaotian.Jing@mediatek.com>,
	"Chun-Hung Wu (巫駿宏)" <Chun-hung.Wu@mediatek.com>,
	"Yi-fan Peng (彭羿凡)" <Yi-fan.Peng@mediatek.com>,
	"Qilin Tan (谭麒麟)" <Qilin.Tan@mediatek.com>,
	"linux-mediatek@lists.infradead.org"
	<linux-mediatek@lists.infradead.org>,
	"Jiajie Hao (郝加节)" <jiajie.hao@mediatek.com>,
	"Lin Gui (桂林)" <Lin.Gui@mediatek.com>,
	"Naomi Chu (朱詠田)" <Naomi.Chu@mediatek.com>,
	"Tun-yu Yu (游敦聿)" <Tun-yu.Yu@mediatek.com>
Subject: Re: [PATCH v1] ufs: core: Fix runtime suspend error deadlock
Date: Wed, 24 Sep 2025 09:26:26 +0000	[thread overview]
Message-ID: <2ab086da45acaab5ff6ff5117670a8ae65d2f0ca.camel@mediatek.com> (raw)
In-Reply-To: <ecc17025-692d-45fe-97eb-9cc4c4ce7a06@acm.org>

On Tue, 2025-09-23 at 09:07 -0700, Bart Van Assche wrote:
> 
> 
> Does this patch introduce a race condition? Can a power management
> operation start after hba->pm_op_in_progress has been tested and
> before
> ufshcd_err_handling_prepare() is called? Should the added code
> perhaps
> be surrounded with ufshcd_rpm_get_noresume() and ufshcd_rpm_put()?
> 
> Thanks,
> 
> Bart.

Hi Bart,

Are you saying that after the runtime suspend timer expires, 
the error handler might be triggered just before runtime suspend?
I don't think this can happen, since there shouldn't be anything 
triggering the error handler when the bus has been idle for a long
time.

Thanks
Peter


  reply	other threads:[~2025-09-24  9:26 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-09-23  8:20 [PATCH v1] ufs: core: Fix runtime suspend error deadlock peter.wang
2025-09-23 16:07 ` Bart Van Assche
2025-09-24  9:26   ` Peter Wang (王信友) [this message]
2025-09-24 21:51     ` Bart Van Assche
2025-09-25 10:03       ` Peter Wang (王信友)

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