| Message ID | 20230818193546.2014874-14-bvanassche@acm.org |
|---|---|
| State | New |
| Headers | show |
| Series | Improve performance for zoned UFS devices | expand |
Hi Bart, Cannot call ufshcd_auto_hibern8_update here. ufshcd_auto_hibern8_update will get runtime pm. but ufs_mtk_auto_hibern8_disable only used in runtime suspend flow. So, call ufshcd_auto_hibern8_update will get deadlock to wait runtime resume. Thanks. Peter On Fri, 2023-08-18 at 12:34 -0700, Bart Van Assche wrote: > Call ufshcd_auto_hibern8_update() instead of writing directly into > the > auto-hibernation control register. This patch is part of an effort to > move all auto-hibernation register changes into the UFSHCI driver > core. > > Cc: Martin K. Petersen <martin.petersen@oracle.com> > Cc: Can Guo <quic_cang@quicinc.com> > Cc: Avri Altman <avri.altman@wdc.com> > Cc: Bao D. Nguyen <quic_nguyenb@quicinc.com> > Signed-off-by: Bart Van Assche <bvanassche@acm.org> > Reviewed-by: Bao D. Nguyen <quic_nguyenb@quicinc.com> > --- > drivers/ufs/host/ufs-mediatek.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs- > mediatek.c > index e68b05976f9e..266898a877b0 100644 > --- a/drivers/ufs/host/ufs-mediatek.c > +++ b/drivers/ufs/host/ufs-mediatek.c > @@ -1252,7 +1252,7 @@ static void ufs_mtk_auto_hibern8_disable(struct > ufs_hba *hba) > int ret; > > /* disable auto-hibern8 */ > - ufshcd_writel(hba, 0, REG_AUTO_HIBERNATE_IDLE_TIMER); > + WARN_ON_ONCE(ufshcd_auto_hibern8_update(hba, 0) != 0); > > /* wait host return to idle state when auto-hibern8 off */ > ufs_mtk_wait_idle_state(hba, 5);
On 8/22/23 02:20, Peter Wang (王信友) wrote: > Cannot call ufshcd_auto_hibern8_update here. > ufshcd_auto_hibern8_update will get runtime pm. > but > ufs_mtk_auto_hibern8_disable only used in runtime suspend flow. > So, call ufshcd_auto_hibern8_update will get deadlock to wait runtime > resume. Hi Peter, Thanks for the feedback. I'm going to drop this patch and also ufs-hisi patch. Although that will lead to suboptimal performance if the user enables auto-hibernation, users can achieve full performance for small zoned writes by disabling auto-hibernation through sysfs. Thanks, Bart.
diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c index e68b05976f9e..266898a877b0 100644 --- a/drivers/ufs/host/ufs-mediatek.c +++ b/drivers/ufs/host/ufs-mediatek.c @@ -1252,7 +1252,7 @@ static void ufs_mtk_auto_hibern8_disable(struct ufs_hba *hba) int ret; /* disable auto-hibern8 */ - ufshcd_writel(hba, 0, REG_AUTO_HIBERNATE_IDLE_TIMER); + WARN_ON_ONCE(ufshcd_auto_hibern8_update(hba, 0) != 0); /* wait host return to idle state when auto-hibern8 off */ ufs_mtk_wait_idle_state(hba, 5);
Call ufshcd_auto_hibern8_update() instead of writing directly into the auto-hibernation control register. This patch is part of an effort to move all auto-hibernation register changes into the UFSHCI driver core. Cc: Martin K. Petersen <martin.petersen@oracle.com> Cc: Can Guo <quic_cang@quicinc.com> Cc: Avri Altman <avri.altman@wdc.com> Cc: Bao D. Nguyen <quic_nguyenb@quicinc.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> --- drivers/ufs/host/ufs-mediatek.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)