| Message ID | 20210107074710.549309-2-jaegeuk@kernel.org (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | UFS bug fixes | expand |
On 2021-01-07 15:47, Jaegeuk Kim wrote: > 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. > > Fixes: 1918651f2d7e ("scsi: ufs: Clear UAC for RPMB after ufshcd > resets") > Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org> > --- > drivers/scsi/ufs/ufshcd.c | 19 ++++++++++++------- > 1 file changed, 12 insertions(+), 7 deletions(-) > > diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c > index bedb822a40a3..e6e7bdf99cd7 100644 > --- a/drivers/scsi/ufs/ufshcd.c > +++ b/drivers/scsi/ufs/ufshcd.c > @@ -3996,6 +3996,8 @@ int ufshcd_link_recovery(struct ufs_hba *hba) > if (ret) > dev_err(hba->dev, "%s: link recovery failed, err %d", > __func__, ret); > + else > + ufshcd_clear_ua_wluns(hba); > > return ret; > } > @@ -6003,6 +6005,9 @@ static void ufshcd_err_handler(struct work_struct > *work) > ufshcd_scsi_unblock_requests(hba); > ufshcd_err_handling_unprepare(hba); > up(&hba->eh_sem); > + > + if (!err && needs_reset) > + ufshcd_clear_ua_wluns(hba); > } > > /** > @@ -6940,14 +6945,11 @@ static int > ufshcd_host_reset_and_restore(struct ufs_hba *hba) > ufshcd_set_clk_freq(hba, true); > > err = ufshcd_hba_enable(hba); > - if (err) > - goto out; > > /* Establish the link again and restore the device */ > - err = ufshcd_probe_hba(hba, false); > if (!err) > - ufshcd_clear_ua_wluns(hba); > -out: > + err = ufshcd_probe_hba(hba, false); > + > if (err) > dev_err(hba->dev, "%s: Host init failed %d\n", __func__, err); > ufshcd_update_evt_hist(hba, UFS_EVT_HOST_RESET, (u32)err); > @@ -7718,6 +7720,8 @@ static int ufshcd_add_lus(struct ufs_hba *hba) > if (ret) > goto out; > > + ufshcd_clear_ua_wluns(hba); > + > /* Initialize devfreq after UFS device is detected */ > if (ufshcd_is_clkscaling_supported(hba)) { > memcpy(&hba->clk_scaling.saved_pwr_info.info, > @@ -7919,8 +7923,6 @@ static void ufshcd_async_scan(void *data, > async_cookie_t cookie) > pm_runtime_put_sync(hba->dev); > ufshcd_exit_clk_scaling(hba); > ufshcd_hba_exit(hba); > - } else { > - ufshcd_clear_ua_wluns(hba); > } > } > > @@ -8777,6 +8779,7 @@ static int ufshcd_suspend(struct ufs_hba *hba, > enum ufs_pm_op pm_op) > ufshcd_resume_clkscaling(hba); > hba->clk_gating.is_suspended = false; > hba->dev_info.b_rpm_dev_flush_capable = false; > + ufshcd_clear_ua_wluns(hba); > ufshcd_release(hba); > out: > if (hba->dev_info.b_rpm_dev_flush_capable) { > @@ -8887,6 +8890,8 @@ static int ufshcd_resume(struct ufs_hba *hba, > enum ufs_pm_op pm_op) > cancel_delayed_work(&hba->rpm_dev_flush_recheck_work); > } > > + ufshcd_clear_ua_wluns(hba); > + > /* Schedule clock gating in case of no access to UFS device yet */ > ufshcd_release(hba); Reviewed-by: Can Guo <cang@codeaurora.org>
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index bedb822a40a3..e6e7bdf99cd7 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -3996,6 +3996,8 @@ int ufshcd_link_recovery(struct ufs_hba *hba) if (ret) dev_err(hba->dev, "%s: link recovery failed, err %d", __func__, ret); + else + ufshcd_clear_ua_wluns(hba); return ret; } @@ -6003,6 +6005,9 @@ static void ufshcd_err_handler(struct work_struct *work) ufshcd_scsi_unblock_requests(hba); ufshcd_err_handling_unprepare(hba); up(&hba->eh_sem); + + if (!err && needs_reset) + ufshcd_clear_ua_wluns(hba); } /** @@ -6940,14 +6945,11 @@ static int ufshcd_host_reset_and_restore(struct ufs_hba *hba) ufshcd_set_clk_freq(hba, true); err = ufshcd_hba_enable(hba); - if (err) - goto out; /* Establish the link again and restore the device */ - err = ufshcd_probe_hba(hba, false); if (!err) - ufshcd_clear_ua_wluns(hba); -out: + err = ufshcd_probe_hba(hba, false); + if (err) dev_err(hba->dev, "%s: Host init failed %d\n", __func__, err); ufshcd_update_evt_hist(hba, UFS_EVT_HOST_RESET, (u32)err); @@ -7718,6 +7720,8 @@ static int ufshcd_add_lus(struct ufs_hba *hba) if (ret) goto out; + ufshcd_clear_ua_wluns(hba); + /* Initialize devfreq after UFS device is detected */ if (ufshcd_is_clkscaling_supported(hba)) { memcpy(&hba->clk_scaling.saved_pwr_info.info, @@ -7919,8 +7923,6 @@ static void ufshcd_async_scan(void *data, async_cookie_t cookie) pm_runtime_put_sync(hba->dev); ufshcd_exit_clk_scaling(hba); ufshcd_hba_exit(hba); - } else { - ufshcd_clear_ua_wluns(hba); } } @@ -8777,6 +8779,7 @@ static int ufshcd_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) ufshcd_resume_clkscaling(hba); hba->clk_gating.is_suspended = false; hba->dev_info.b_rpm_dev_flush_capable = false; + ufshcd_clear_ua_wluns(hba); ufshcd_release(hba); out: if (hba->dev_info.b_rpm_dev_flush_capable) { @@ -8887,6 +8890,8 @@ static int ufshcd_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op) cancel_delayed_work(&hba->rpm_dev_flush_recheck_work); } + ufshcd_clear_ua_wluns(hba); + /* Schedule clock gating in case of no access to UFS device yet */ ufshcd_release(hba);
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. Fixes: 1918651f2d7e ("scsi: ufs: Clear UAC for RPMB after ufshcd resets") Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org> --- drivers/scsi/ufs/ufshcd.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-)