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Date: Mon, 21 Dec 2020 07:23:39 -0800 From: Jaegeuk Kim <jaegeuk@...nel.org> To: Avri Altman <Avri.Altman@....com> Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>, "kernel-team@...roid.com" <kernel-team@...roid.com>, "cang@...eaurora.org" <cang@...eaurora.org>, "alim.akhtar@...sung.com" <alim.akhtar@...sung.com>, "bvanassche@....org" <bvanassche@....org>, "martin.petersen@...cle.com" <martin.petersen@...cle.com>, "stanley.chu@...iatek.com" <stanley.chu@...iatek.com> Subject: Re: [PATCH] scsi: ufs: fix livelock of ufshcd_clear_ua_wluns Hi, On 12/20, Avri Altman wrote: > Hi J, > > > > > When gate_work/ungate_work gets an error during hibern8_enter or exit, > > ufshcd_err_handler() > > ufshcd_scsi_block_requests() > > ufshcd_reset_and_restore() > > ufshcd_clear_ua_wluns() -> stuck > > ufshcd_scsi_unblock_requests() > > > > In order to avoid it, ufshcd_clear_ua_wluns() can be called per recovery > > flows > > such as suspend/resume, link_recovery, and error_handler. > Not sure that suspend/resume are UAC events? Could you elaborate a bit? The goal is to clear UAC after UFS reset happens. > > Also the 'fixes' tag is missing. Added. Thanks, > > Thanks, > Avri
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