6.13-stable review patch. If anyone has any objections, please let me know.
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From: Manivannan Sadhasivam manivannan.sadhasivam@linaro.org
[ Upstream commit fe06b7c07f3fbcce2a2ca6f7b0d543b5699ea00f ]
Commit bb9850704c04 ("scsi: ufs: core: Honor runtime/system PM levels if set by host controller drivers") introduced the check for setting default PM levels only if the levels are uninitialized by the host controller drivers. But it missed the fact that the levels could be initialized to 0 (UFS_PM_LVL_0) on purpose by the controller drivers. Even though none of the drivers are doing so now, the logic should be fixed irrespectively.
So set the default levels unconditionally before calling ufshcd_hba_init() API which initializes the controller drivers. It ensures that the controller drivers could override the default levels if required.
Fixes: bb9850704c04 ("scsi: ufs: core: Honor runtime/system PM levels if set by host controller drivers") Reported-by: Bao D. Nguyen quic_nguyenb@quicinc.com Signed-off-by: Manivannan Sadhasivam manivannan.sadhasivam@linaro.org Link: https://lore.kernel.org/r/20250219105047.49932-1-manivannan.sadhasivam@linar... Reviewed-by: Bart Van Assche bvanassche@acm.org Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/ufs/core/ufshcd.c | 30 +++++++++++++++--------------- 1 file changed, 15 insertions(+), 15 deletions(-)
diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c index 37b626e128f95..a5bb6ea96460c 100644 --- a/drivers/ufs/core/ufshcd.c +++ b/drivers/ufs/core/ufshcd.c @@ -10494,6 +10494,21 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *mmio_base, unsigned int irq) */ spin_lock_init(&hba->clk_gating.lock);
+ /* + * Set the default power management level for runtime and system PM. + * Host controller drivers can override them in their + * 'ufs_hba_variant_ops::init' callback. + * + * Default power saving mode is to keep UFS link in Hibern8 state + * and UFS device in sleep state. + */ + hba->rpm_lvl = ufs_get_desired_pm_lvl_for_dev_link_state( + UFS_SLEEP_PWR_MODE, + UIC_LINK_HIBERN8_STATE); + hba->spm_lvl = ufs_get_desired_pm_lvl_for_dev_link_state( + UFS_SLEEP_PWR_MODE, + UIC_LINK_HIBERN8_STATE); + err = ufshcd_hba_init(hba); if (err) goto out_error; @@ -10607,21 +10622,6 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *mmio_base, unsigned int irq) goto out_disable; }
- /* - * Set the default power management level for runtime and system PM if - * not set by the host controller drivers. - * Default power saving mode is to keep UFS link in Hibern8 state - * and UFS device in sleep state. - */ - if (!hba->rpm_lvl) - hba->rpm_lvl = ufs_get_desired_pm_lvl_for_dev_link_state( - UFS_SLEEP_PWR_MODE, - UIC_LINK_HIBERN8_STATE); - if (!hba->spm_lvl) - hba->spm_lvl = ufs_get_desired_pm_lvl_for_dev_link_state( - UFS_SLEEP_PWR_MODE, - UIC_LINK_HIBERN8_STATE); - INIT_DELAYED_WORK(&hba->rpm_dev_flush_recheck_work, ufshcd_rpm_dev_flush_recheck_work); INIT_DELAYED_WORK(&hba->ufs_rtc_update_work, ufshcd_rtc_work);