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Date: Mon, 17 Aug 2020 23:12:32 -0400 From: "Martin K. Petersen" <martin.petersen@...cle.com> To: linux-scsi@...r.kernel.org, bvanassche@....org, avri.altman@....com, jejb@...ux.ibm.com, alim.akhtar@...sung.com, Stanley Chu <stanley.chu@...iatek.com> Cc: "Martin K . Petersen" <martin.petersen@...cle.com>, linux-mediatek@...ts.infradead.org, matthias.bgg@...il.com, chaotian.jing@...iatek.com, peter.wang@...iatek.com, linux-arm-kernel@...ts.infradead.org, cc.chou@...iatek.com, kuohong.wang@...iatek.com, andy.teng@...iatek.com, asutoshd@...eaurora.org, cang@...eaurora.org, beanhuo@...ron.com, linux-kernel@...r.kernel.org, chun-hung.wu@...iatek.com Subject: Re: [PATCH v3] scsi: ufs: Fix possible infinite loop in ufshcd_hold On Sun, 9 Aug 2020 13:07:34 +0800, Stanley Chu wrote: > In ufshcd_suspend(), after clk-gating is suspended and link is set > as Hibern8 state, ufshcd_hold() is still possibly invoked before > ufshcd_suspend() returns. For example, MediaTek's suspend vops may > issue UIC commands which would call ufshcd_hold() during the command > issuing flow. > > Now if UFSHCD_CAP_HIBERN8_WITH_CLK_GATING capability is enabled, > then ufshcd_hold() may enter infinite loops because there is no > clk-ungating work scheduled or pending. In this case, ufshcd_hold() > shall just bypass, and keep the link as Hibern8 state. Applied to 5.9/scsi-fixes, thanks! [1/1] scsi: ufs: Fix possible infinite loop in ufshcd_hold https://git.kernel.org/mkp/scsi/c/93b6c5db0602 -- Martin K. Petersen Oracle Linux Engineering
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