| Message ID | 1614145010-36079-2-git-send-email-cang@codeaurora.org |
|---|---|
| State | New |
| Headers | show |
| Series | Three minor changes related with error handling | expand |
> > > In error handling prepare stage, after SCSI requests are blocked, do a > down/up_write(clk_scaling_lock) to clean up the queuecommand() path. > Meanwhile, stop eeh_work in case it disturbs error recovery. Moreover, > reset ufshcd_state at the entrance of ufshcd_probe_hba(), since it may be > called multiple times during error recovery. > > Signed-off-by: Can Guo <cang@codeaurora.org> I noticed that you tagged Adrian's patch - https://lore.kernel.org/lkml/20210301191940.15247-1-adrian.hunter@intel.com/ So this patch needs to be adjusted accordingly? Thanks, Avri > --- > drivers/scsi/ufs/ufshcd.c | 18 ++++++++++++------ > 1 file changed, 12 insertions(+), 6 deletions(-) > > diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c > index 80620c8..013eb73 100644 > --- a/drivers/scsi/ufs/ufshcd.c > +++ b/drivers/scsi/ufs/ufshcd.c > @@ -4987,6 +4987,7 @@ ufshcd_transfer_rsp_status(struct ufs_hba *hba, > struct ufshcd_lrb *lrbp) > * UFS device needs urgent BKOPs. > */ > if (!hba->pm_op_in_progress && > + !ufshcd_eh_in_progress(hba) && > ufshcd_is_exception_event(lrbp->ucd_rsp_ptr) && > schedule_work(&hba->eeh_work)) { > /* > @@ -5784,13 +5785,20 @@ static void ufshcd_err_handling_prepare(struct > ufs_hba *hba) > ufshcd_suspend_clkscaling(hba); > ufshcd_clk_scaling_allow(hba, false); > } > + ufshcd_scsi_block_requests(hba); > + /* Drain ufshcd_queuecommand() */ > + down_write(&hba->clk_scaling_lock); > + up_write(&hba->clk_scaling_lock); > + cancel_work_sync(&hba->eeh_work); > } > > static void ufshcd_err_handling_unprepare(struct ufs_hba *hba) > { > + ufshcd_scsi_unblock_requests(hba); > ufshcd_release(hba); > if (ufshcd_is_clkscaling_supported(hba)) > ufshcd_clk_scaling_suspend(hba, false); > + ufshcd_clear_ua_wluns(hba); > pm_runtime_put(hba->dev); > } > > @@ -5882,8 +5890,8 @@ static void ufshcd_err_handler(struct work_struct > *work) > spin_unlock_irqrestore(hba->host->host_lock, flags); > ufshcd_err_handling_prepare(hba); > spin_lock_irqsave(hba->host->host_lock, flags); > - ufshcd_scsi_block_requests(hba); > - hba->ufshcd_state = UFSHCD_STATE_RESET; > + if (hba->ufshcd_state != UFSHCD_STATE_ERROR) > + hba->ufshcd_state = UFSHCD_STATE_RESET; > > /* Complete requests that have door-bell cleared by h/w */ > ufshcd_complete_requests(hba); > @@ -6042,12 +6050,8 @@ static void ufshcd_err_handler(struct work_struct > *work) > } > ufshcd_clear_eh_in_progress(hba); > spin_unlock_irqrestore(hba->host->host_lock, flags); > - ufshcd_scsi_unblock_requests(hba); > ufshcd_err_handling_unprepare(hba); > up(&hba->host_sem); > - > - if (!err && needs_reset) > - ufshcd_clear_ua_wluns(hba); > } > > /** > @@ -7858,6 +7862,8 @@ static int ufshcd_probe_hba(struct ufs_hba *hba, > bool async) > unsigned long flags; > ktime_t start = ktime_get(); > > + hba->ufshcd_state = UFSHCD_STATE_RESET; > + > ret = ufshcd_link_startup(hba); > if (ret) > goto out; > -- > Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux > Foundation Collaborative Project.
Hi Avri, On 2021-03-03 15:22, Avri Altman wrote: >> >> >> In error handling prepare stage, after SCSI requests are blocked, do a >> down/up_write(clk_scaling_lock) to clean up the queuecommand() path. >> Meanwhile, stop eeh_work in case it disturbs error recovery. Moreover, >> reset ufshcd_state at the entrance of ufshcd_probe_hba(), since it may >> be >> called multiple times during error recovery. >> >> Signed-off-by: Can Guo <cang@codeaurora.org> > I noticed that you tagged Adrian's patch - > https://lore.kernel.org/lkml/20210301191940.15247-1-adrian.hunter@intel.com/ > So this patch needs to be adjusted accordingly? Thanks for pointing me to that one, I will rebase mine. Regards, Can Guo. > > Thanks, > Avri > >> --- >> drivers/scsi/ufs/ufshcd.c | 18 ++++++++++++------ >> 1 file changed, 12 insertions(+), 6 deletions(-) >> >> diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c >> index 80620c8..013eb73 100644 >> --- a/drivers/scsi/ufs/ufshcd.c >> +++ b/drivers/scsi/ufs/ufshcd.c >> @@ -4987,6 +4987,7 @@ ufshcd_transfer_rsp_status(struct ufs_hba *hba, >> struct ufshcd_lrb *lrbp) >> * UFS device needs urgent BKOPs. >> */ >> if (!hba->pm_op_in_progress && >> + !ufshcd_eh_in_progress(hba) && >> >> ufshcd_is_exception_event(lrbp->ucd_rsp_ptr) && >> schedule_work(&hba->eeh_work)) { >> /* >> @@ -5784,13 +5785,20 @@ static void ufshcd_err_handling_prepare(struct >> ufs_hba *hba) >> ufshcd_suspend_clkscaling(hba); >> ufshcd_clk_scaling_allow(hba, false); >> } >> + ufshcd_scsi_block_requests(hba); >> + /* Drain ufshcd_queuecommand() */ >> + down_write(&hba->clk_scaling_lock); >> + up_write(&hba->clk_scaling_lock); >> + cancel_work_sync(&hba->eeh_work); >> } >> >> static void ufshcd_err_handling_unprepare(struct ufs_hba *hba) >> { >> + ufshcd_scsi_unblock_requests(hba); >> ufshcd_release(hba); >> if (ufshcd_is_clkscaling_supported(hba)) >> ufshcd_clk_scaling_suspend(hba, false); >> + ufshcd_clear_ua_wluns(hba); >> pm_runtime_put(hba->dev); >> } >> >> @@ -5882,8 +5890,8 @@ static void ufshcd_err_handler(struct >> work_struct >> *work) >> spin_unlock_irqrestore(hba->host->host_lock, flags); >> ufshcd_err_handling_prepare(hba); >> spin_lock_irqsave(hba->host->host_lock, flags); >> - ufshcd_scsi_block_requests(hba); >> - hba->ufshcd_state = UFSHCD_STATE_RESET; >> + if (hba->ufshcd_state != UFSHCD_STATE_ERROR) >> + hba->ufshcd_state = UFSHCD_STATE_RESET; >> >> /* Complete requests that have door-bell cleared by h/w */ >> ufshcd_complete_requests(hba); >> @@ -6042,12 +6050,8 @@ static void ufshcd_err_handler(struct >> work_struct >> *work) >> } >> ufshcd_clear_eh_in_progress(hba); >> spin_unlock_irqrestore(hba->host->host_lock, flags); >> - ufshcd_scsi_unblock_requests(hba); >> ufshcd_err_handling_unprepare(hba); >> up(&hba->host_sem); >> - >> - if (!err && needs_reset) >> - ufshcd_clear_ua_wluns(hba); >> } >> >> /** >> @@ -7858,6 +7862,8 @@ static int ufshcd_probe_hba(struct ufs_hba *hba, >> bool async) >> unsigned long flags; >> ktime_t start = ktime_get(); >> >> + hba->ufshcd_state = UFSHCD_STATE_RESET; >> + >> ret = ufshcd_link_startup(hba); >> if (ret) >> goto out; >> -- >> Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a >> Linux >> Foundation Collaborative Project.
On 2021-03-03 18:03, Can Guo wrote: > Hi Avri, > > On 2021-03-03 15:22, Avri Altman wrote: >>> >>> >>> In error handling prepare stage, after SCSI requests are blocked, do >>> a >>> down/up_write(clk_scaling_lock) to clean up the queuecommand() path. >>> Meanwhile, stop eeh_work in case it disturbs error recovery. >>> Moreover, >>> reset ufshcd_state at the entrance of ufshcd_probe_hba(), since it >>> may be >>> called multiple times during error recovery. >>> >>> Signed-off-by: Can Guo <cang@codeaurora.org> >> I noticed that you tagged Adrian's patch - >> https://lore.kernel.org/lkml/20210301191940.15247-1-adrian.hunter@intel.com/ >> So this patch needs to be adjusted accordingly? > > Thanks for pointing me to that one, I will rebase mine. > > Regards, > Can Guo. > Just noticed that Adrian's change comes later than mine, so I may not need to adjust mine. Thanks, Can Guo. >> >> Thanks, >> Avri >> >>> --- >>> drivers/scsi/ufs/ufshcd.c | 18 ++++++++++++------ >>> 1 file changed, 12 insertions(+), 6 deletions(-) >>> >>> diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c >>> index 80620c8..013eb73 100644 >>> --- a/drivers/scsi/ufs/ufshcd.c >>> +++ b/drivers/scsi/ufs/ufshcd.c >>> @@ -4987,6 +4987,7 @@ ufshcd_transfer_rsp_status(struct ufs_hba *hba, >>> struct ufshcd_lrb *lrbp) >>> * UFS device needs urgent BKOPs. >>> */ >>> if (!hba->pm_op_in_progress && >>> + !ufshcd_eh_in_progress(hba) && >>> >>> ufshcd_is_exception_event(lrbp->ucd_rsp_ptr) && >>> schedule_work(&hba->eeh_work)) { >>> /* >>> @@ -5784,13 +5785,20 @@ static void >>> ufshcd_err_handling_prepare(struct >>> ufs_hba *hba) >>> ufshcd_suspend_clkscaling(hba); >>> ufshcd_clk_scaling_allow(hba, false); >>> } >>> + ufshcd_scsi_block_requests(hba); >>> + /* Drain ufshcd_queuecommand() */ >>> + down_write(&hba->clk_scaling_lock); >>> + up_write(&hba->clk_scaling_lock); >>> + cancel_work_sync(&hba->eeh_work); >>> } >>> >>> static void ufshcd_err_handling_unprepare(struct ufs_hba *hba) >>> { >>> + ufshcd_scsi_unblock_requests(hba); >>> ufshcd_release(hba); >>> if (ufshcd_is_clkscaling_supported(hba)) >>> ufshcd_clk_scaling_suspend(hba, false); >>> + ufshcd_clear_ua_wluns(hba); >>> pm_runtime_put(hba->dev); >>> } >>> >>> @@ -5882,8 +5890,8 @@ static void ufshcd_err_handler(struct >>> work_struct >>> *work) >>> spin_unlock_irqrestore(hba->host->host_lock, flags); >>> ufshcd_err_handling_prepare(hba); >>> spin_lock_irqsave(hba->host->host_lock, flags); >>> - ufshcd_scsi_block_requests(hba); >>> - hba->ufshcd_state = UFSHCD_STATE_RESET; >>> + if (hba->ufshcd_state != UFSHCD_STATE_ERROR) >>> + hba->ufshcd_state = UFSHCD_STATE_RESET; >>> >>> /* Complete requests that have door-bell cleared by h/w */ >>> ufshcd_complete_requests(hba); >>> @@ -6042,12 +6050,8 @@ static void ufshcd_err_handler(struct >>> work_struct >>> *work) >>> } >>> ufshcd_clear_eh_in_progress(hba); >>> spin_unlock_irqrestore(hba->host->host_lock, flags); >>> - ufshcd_scsi_unblock_requests(hba); >>> ufshcd_err_handling_unprepare(hba); >>> up(&hba->host_sem); >>> - >>> - if (!err && needs_reset) >>> - ufshcd_clear_ua_wluns(hba); >>> } >>> >>> /** >>> @@ -7858,6 +7862,8 @@ static int ufshcd_probe_hba(struct ufs_hba >>> *hba, >>> bool async) >>> unsigned long flags; >>> ktime_t start = ktime_get(); >>> >>> + hba->ufshcd_state = UFSHCD_STATE_RESET; >>> + >>> ret = ufshcd_link_startup(hba); >>> if (ret) >>> goto out; >>> -- >>> Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a >>> Linux >>> Foundation Collaborative Project.
> > In error handling prepare stage, after SCSI requests are blocked, do a > down/up_write(clk_scaling_lock) to clean up the queuecommand() path. > Meanwhile, stop eeh_work in case it disturbs error recovery. Moreover, > reset ufshcd_state at the entrance of ufshcd_probe_hba(), since it may be > called multiple times during error recovery. > > Signed-off-by: Can Guo <cang@codeaurora.org> Reviewed-by: Avri Altman <avri.altman@wdc.com> > --- > drivers/scsi/ufs/ufshcd.c | 18 ++++++++++++------ > 1 file changed, 12 insertions(+), 6 deletions(-) > > diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c > index 80620c8..013eb73 100644 > --- a/drivers/scsi/ufs/ufshcd.c > +++ b/drivers/scsi/ufs/ufshcd.c > @@ -4987,6 +4987,7 @@ ufshcd_transfer_rsp_status(struct ufs_hba *hba, > struct ufshcd_lrb *lrbp) > * UFS device needs urgent BKOPs. > */ > if (!hba->pm_op_in_progress && > + !ufshcd_eh_in_progress(hba) && > ufshcd_is_exception_event(lrbp->ucd_rsp_ptr) && > schedule_work(&hba->eeh_work)) { > /* > @@ -5784,13 +5785,20 @@ static void ufshcd_err_handling_prepare(struct > ufs_hba *hba) > ufshcd_suspend_clkscaling(hba); > ufshcd_clk_scaling_allow(hba, false); > } > + ufshcd_scsi_block_requests(hba); > + /* Drain ufshcd_queuecommand() */ > + down_write(&hba->clk_scaling_lock); > + up_write(&hba->clk_scaling_lock); > + cancel_work_sync(&hba->eeh_work); > } > > static void ufshcd_err_handling_unprepare(struct ufs_hba *hba) > { > + ufshcd_scsi_unblock_requests(hba); > ufshcd_release(hba); > if (ufshcd_is_clkscaling_supported(hba)) > ufshcd_clk_scaling_suspend(hba, false); > + ufshcd_clear_ua_wluns(hba); > pm_runtime_put(hba->dev); > } > > @@ -5882,8 +5890,8 @@ static void ufshcd_err_handler(struct work_struct > *work) > spin_unlock_irqrestore(hba->host->host_lock, flags); > ufshcd_err_handling_prepare(hba); > spin_lock_irqsave(hba->host->host_lock, flags); > - ufshcd_scsi_block_requests(hba); > - hba->ufshcd_state = UFSHCD_STATE_RESET; > + if (hba->ufshcd_state != UFSHCD_STATE_ERROR) > + hba->ufshcd_state = UFSHCD_STATE_RESET; > > /* Complete requests that have door-bell cleared by h/w */ > ufshcd_complete_requests(hba); > @@ -6042,12 +6050,8 @@ static void ufshcd_err_handler(struct work_struct > *work) > } > ufshcd_clear_eh_in_progress(hba); > spin_unlock_irqrestore(hba->host->host_lock, flags); > - ufshcd_scsi_unblock_requests(hba); > ufshcd_err_handling_unprepare(hba); > up(&hba->host_sem); > - > - if (!err && needs_reset) > - ufshcd_clear_ua_wluns(hba); > } > > /** > @@ -7858,6 +7862,8 @@ static int ufshcd_probe_hba(struct ufs_hba *hba, > bool async) > unsigned long flags; > ktime_t start = ktime_get(); > > + hba->ufshcd_state = UFSHCD_STATE_RESET; > + > ret = ufshcd_link_startup(hba); > if (ret) > goto out; > -- > Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux > Foundation Collaborative Project.
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 80620c8..013eb73 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -4987,6 +4987,7 @@ ufshcd_transfer_rsp_status(struct ufs_hba *hba, struct ufshcd_lrb *lrbp) * UFS device needs urgent BKOPs. */ if (!hba->pm_op_in_progress && + !ufshcd_eh_in_progress(hba) && ufshcd_is_exception_event(lrbp->ucd_rsp_ptr) && schedule_work(&hba->eeh_work)) { /* @@ -5784,13 +5785,20 @@ static void ufshcd_err_handling_prepare(struct ufs_hba *hba) ufshcd_suspend_clkscaling(hba); ufshcd_clk_scaling_allow(hba, false); } + ufshcd_scsi_block_requests(hba); + /* Drain ufshcd_queuecommand() */ + down_write(&hba->clk_scaling_lock); + up_write(&hba->clk_scaling_lock); + cancel_work_sync(&hba->eeh_work); } static void ufshcd_err_handling_unprepare(struct ufs_hba *hba) { + ufshcd_scsi_unblock_requests(hba); ufshcd_release(hba); if (ufshcd_is_clkscaling_supported(hba)) ufshcd_clk_scaling_suspend(hba, false); + ufshcd_clear_ua_wluns(hba); pm_runtime_put(hba->dev); } @@ -5882,8 +5890,8 @@ static void ufshcd_err_handler(struct work_struct *work) spin_unlock_irqrestore(hba->host->host_lock, flags); ufshcd_err_handling_prepare(hba); spin_lock_irqsave(hba->host->host_lock, flags); - ufshcd_scsi_block_requests(hba); - hba->ufshcd_state = UFSHCD_STATE_RESET; + if (hba->ufshcd_state != UFSHCD_STATE_ERROR) + hba->ufshcd_state = UFSHCD_STATE_RESET; /* Complete requests that have door-bell cleared by h/w */ ufshcd_complete_requests(hba); @@ -6042,12 +6050,8 @@ static void ufshcd_err_handler(struct work_struct *work) } ufshcd_clear_eh_in_progress(hba); spin_unlock_irqrestore(hba->host->host_lock, flags); - ufshcd_scsi_unblock_requests(hba); ufshcd_err_handling_unprepare(hba); up(&hba->host_sem); - - if (!err && needs_reset) - ufshcd_clear_ua_wluns(hba); } /** @@ -7858,6 +7862,8 @@ static int ufshcd_probe_hba(struct ufs_hba *hba, bool async) unsigned long flags; ktime_t start = ktime_get(); + hba->ufshcd_state = UFSHCD_STATE_RESET; + ret = ufshcd_link_startup(hba); if (ret) goto out;
In error handling prepare stage, after SCSI requests are blocked, do a down/up_write(clk_scaling_lock) to clean up the queuecommand() path. Meanwhile, stop eeh_work in case it disturbs error recovery. Moreover, reset ufshcd_state at the entrance of ufshcd_probe_hba(), since it may be called multiple times during error recovery. Signed-off-by: Can Guo <cang@codeaurora.org> --- drivers/scsi/ufs/ufshcd.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-)