* [PATCH v3] ufs: core: wlun suspend SSU/enter hibern8 fail recovery
@ 2022-12-02 7:35 peter.wang
2022-12-05 18:41 ` Bart Van Assche
0 siblings, 1 reply; 3+ messages in thread
From: peter.wang @ 2022-12-02 7:35 UTC (permalink / raw)
To: stanley.chu, linux-scsi, martin.petersen, avri.altman,
alim.akhtar, jejb
Cc: wsd_upstream, linux-mediatek, peter.wang, chun-hung.wu,
alice.chao, cc.chou, chaotian.jing, jiajie.hao, powen.kao,
qilin.tan, lin.gui, tun-yu.yu, eddie.huang, naomi.chu
From: Peter Wang <peter.wang@mediatek.com>
When SSU/enter hibern8 fail in wlun suspend flow, trigger error
handler and return busy to break the suspend.
If not, wlun runtime pm status become error and the consumer will
stuck in runtime suspend status.
Signed-off-by: Peter Wang <peter.wang@mediatek.com>
---
drivers/ufs/core/ufshcd.c | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index b1f59a5fe632..a0dbf2c410b1 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -9049,6 +9049,19 @@ static int __ufshcd_wl_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op)
if (!hba->dev_info.b_rpm_dev_flush_capable) {
ret = ufshcd_set_dev_pwr_mode(hba, req_dev_pwr_mode);
+ if (ret && (pm_op != UFS_SHUTDOWN_PM)) {
+ /*
+ * If return err in suspend flow, IO will hang.
+ * Trigger error handler and break suspend for
+ * error recovery.
+ */
+ spin_lock_irq(hba->host->host_lock);
+ hba->force_reset = true;
+ ufshcd_schedule_eh_work(hba);
+ spin_unlock_irq(hba->host->host_lock);
+
+ ret = -EBUSY;
+ }
if (ret)
goto enable_scaling;
}
@@ -9060,6 +9073,19 @@ static int __ufshcd_wl_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op)
*/
check_for_bkops = !ufshcd_is_ufs_dev_deepsleep(hba);
ret = ufshcd_link_state_transition(hba, req_link_state, check_for_bkops);
+ if ((ret) && (pm_op != UFS_SHUTDOWN_PM)) {
+ /*
+ * If return err in suspend flow, IO will hang.
+ * Trigger error handler and break suspend for
+ * error recovery.
+ */
+ spin_lock_irq(hba->host->host_lock);
+ hba->force_reset = true;
+ ufshcd_schedule_eh_work(hba);
+ spin_unlock_irq(hba->host->host_lock);
+
+ ret = -EBUSY;
+ }
if (ret)
goto set_dev_active;
--
2.18.0
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH v3] ufs: core: wlun suspend SSU/enter hibern8 fail recovery
2022-12-02 7:35 [PATCH v3] ufs: core: wlun suspend SSU/enter hibern8 fail recovery peter.wang
@ 2022-12-05 18:41 ` Bart Van Assche
2022-12-06 3:07 ` Peter Wang (王信友)
0 siblings, 1 reply; 3+ messages in thread
From: Bart Van Assche @ 2022-12-05 18:41 UTC (permalink / raw)
To: peter.wang, stanley.chu, linux-scsi, martin.petersen, avri.altman,
alim.akhtar, jejb
Cc: wsd_upstream, linux-mediatek, chun-hung.wu, alice.chao, cc.chou,
chaotian.jing, jiajie.hao, powen.kao, qilin.tan, lin.gui,
tun-yu.yu, eddie.huang, naomi.chu
On 12/1/22 23:35, peter.wang@mediatek.com wrote:
> From: Peter Wang <peter.wang@mediatek.com>
>
> When SSU/enter hibern8 fail in wlun suspend flow, trigger error
> handler and return busy to break the suspend.
> If not, wlun runtime pm status become error and the consumer will
> stuck in runtime suspend status.
>
> Signed-off-by: Peter Wang <peter.wang@mediatek.com>
> ---
> drivers/ufs/core/ufshcd.c | 26 ++++++++++++++++++++++++++
> 1 file changed, 26 insertions(+)
>
> diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
> index b1f59a5fe632..a0dbf2c410b1 100644
> --- a/drivers/ufs/core/ufshcd.c
> +++ b/drivers/ufs/core/ufshcd.c
> @@ -9049,6 +9049,19 @@ static int __ufshcd_wl_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op)
>
> if (!hba->dev_info.b_rpm_dev_flush_capable) {
> ret = ufshcd_set_dev_pwr_mode(hba, req_dev_pwr_mode);
> + if (ret && (pm_op != UFS_SHUTDOWN_PM)) {
> + /*
> + * If return err in suspend flow, IO will hang.
> + * Trigger error handler and break suspend for
> + * error recovery.
> + */
> + spin_lock_irq(hba->host->host_lock);
> + hba->force_reset = true;
> + ufshcd_schedule_eh_work(hba);
> + spin_unlock_irq(hba->host->host_lock);
> +
> + ret = -EBUSY;
> + }
> if (ret)
> goto enable_scaling;
> }
> @@ -9060,6 +9073,19 @@ static int __ufshcd_wl_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op)
> */
> check_for_bkops = !ufshcd_is_ufs_dev_deepsleep(hba);
> ret = ufshcd_link_state_transition(hba, req_link_state, check_for_bkops);
> + if ((ret) && (pm_op != UFS_SHUTDOWN_PM)) {
> + /*
> + * If return err in suspend flow, IO will hang.
> + * Trigger error handler and break suspend for
> + * error recovery.
> + */
> + spin_lock_irq(hba->host->host_lock);
> + hba->force_reset = true;
> + ufshcd_schedule_eh_work(hba);
> + spin_unlock_irq(hba->host->host_lock);
> +
> + ret = -EBUSY;
> + }
> if (ret)
> goto set_dev_active;
>
Please follow the coding style that is used elsewhere in the kernel and
remove the superfluous parentheses from this patch. "if (ret && (pm_op !=
UFS_SHUTDOWN_PM)) {" can be changed into "if (ret && pm_op !=
UFS_SHUTDOWN_PM) {" and "if ((ret) && (pm_op != UFS_SHUTDOWN_PM)) {" can be
changed into "if ((ret) && (pm_op != UFS_SHUTDOWN_PM)) {".
Otherwise this patch looks good to me.
Thanks,
Bart.
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH v3] ufs: core: wlun suspend SSU/enter hibern8 fail recovery
2022-12-05 18:41 ` Bart Van Assche
@ 2022-12-06 3:07 ` Peter Wang (王信友)
0 siblings, 0 replies; 3+ messages in thread
From: Peter Wang (王信友) @ 2022-12-06 3:07 UTC (permalink / raw)
To: linux-scsi@vger.kernel.org, bvanassche@acm.org,
avri.altman@wdc.com, Stanley Chu (朱原陞),
alim.akhtar@samsung.com, martin.petersen@oracle.com,
jejb@linux.ibm.com
Cc: linux-mediatek@lists.infradead.org,
Jiajie Hao (郝加节),
CC Chou (周志杰),
Eddie Huang (黃智傑),
Alice Chao (趙珮均), wsd_upstream,
Lin Gui (桂林),
Chun-Hung Wu (巫駿宏),
Tun-yu Yu (游敦聿),
Chaotian Jing (井朝天),
Powen Kao (高伯文),
Naomi Chu (朱詠田),
Qilin Tan (谭麒麟)
On Mon, 2022-12-05 at 10:41 -0800, Bart Van Assche wrote:
> On 12/1/22 23:35, peter.wang@mediatek.com wrote:
> > From: Peter Wang <peter.wang@mediatek.com>
> >
> > When SSU/enter hibern8 fail in wlun suspend flow, trigger error
> > handler and return busy to break the suspend.
> > If not, wlun runtime pm status become error and the consumer will
> > stuck in runtime suspend status.
> >
> > Signed-off-by: Peter Wang <peter.wang@mediatek.com>
> > ---
> > drivers/ufs/core/ufshcd.c | 26 ++++++++++++++++++++++++++
> > 1 file changed, 26 insertions(+)
> >
> > diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
> > index b1f59a5fe632..a0dbf2c410b1 100644
> > --- a/drivers/ufs/core/ufshcd.c
> > +++ b/drivers/ufs/core/ufshcd.c
> > @@ -9049,6 +9049,19 @@ static int __ufshcd_wl_suspend(struct
> > ufs_hba *hba, enum ufs_pm_op pm_op)
> >
> > if (!hba->dev_info.b_rpm_dev_flush_capable) {
> > ret = ufshcd_set_dev_pwr_mode(hba,
> > req_dev_pwr_mode);
> > + if (ret && (pm_op != UFS_SHUTDOWN_PM)) {
> > + /*
> > + * If return err in suspend flow, IO
> > will hang.
> > + * Trigger error handler and break
> > suspend for
> > + * error recovery.
> > + */
> > + spin_lock_irq(hba->host->host_lock);
> > + hba->force_reset = true;
> > + ufshcd_schedule_eh_work(hba);
> > + spin_unlock_irq(hba->host->host_lock);
> > +
> > + ret = -EBUSY;
> > + }
> > if (ret)
> > goto enable_scaling;
> > }
> > @@ -9060,6 +9073,19 @@ static int __ufshcd_wl_suspend(struct
> > ufs_hba *hba, enum ufs_pm_op pm_op)
> > */
> > check_for_bkops = !ufshcd_is_ufs_dev_deepsleep(hba);
> > ret = ufshcd_link_state_transition(hba, req_link_state,
> > check_for_bkops);
> > + if ((ret) && (pm_op != UFS_SHUTDOWN_PM)) {
> > + /*
> > + * If return err in suspend flow, IO will hang.
> > + * Trigger error handler and break suspend for
> > + * error recovery.
> > + */
> > + spin_lock_irq(hba->host->host_lock);
> > + hba->force_reset = true;
> > + ufshcd_schedule_eh_work(hba);
> > + spin_unlock_irq(hba->host->host_lock);
> > +
> > + ret = -EBUSY;
> > + }
> > if (ret)
> > goto set_dev_active;
> >
>
> Please follow the coding style that is used elsewhere in the kernel
> and
> remove the superfluous parentheses from this patch. "if (ret &&
> (pm_op !=
> UFS_SHUTDOWN_PM)) {" can be changed into "if (ret && pm_op !=
> UFS_SHUTDOWN_PM) {" and "if ((ret) && (pm_op != UFS_SHUTDOWN_PM)) {"
> can be
> changed into "if ((ret) && (pm_op != UFS_SHUTDOWN_PM)) {".
>
> Otherwise this patch looks good to me.
>
> Thanks,
Hi Bart,
Got it, will remove parentheses next version.
Thanks for review.
BR
Peter
>
> Bart.
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2022-12-06 3:07 UTC | newest]
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2022-12-02 7:35 [PATCH v3] ufs: core: wlun suspend SSU/enter hibern8 fail recovery peter.wang
2022-12-05 18:41 ` Bart Van Assche
2022-12-06 3:07 ` Peter Wang (王信友)
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