• Manivannan Sadhasivam's avatar
    scsi: ufs: core: Do not set link to OFF state while waking up from hibernation · ac6efb12
    Manivannan Sadhasivam authored
    UFS link is just put into hibern8 state during the 'freeze' process of the
    hibernation. Afterwards, the system may get powered down. But that doesn't
    matter during wakeup. Because during wakeup from hibernation, UFS link is
    again put into hibern8 state by the restore kernel and then the control is
    handed over to the to image kernel.
    
    So in both the places, UFS link is never turned OFF. But
    ufshcd_system_restore() just assumes that the link will be in OFF state and
    sets the link state accordingly. And this breaks hibernation wakeup:
    
    [ 2445.371335] phy phy-1d87000.phy.3: phy_power_on was called before phy_init
    [ 2445.427883] ufshcd-qcom 1d84000.ufshc: Controller enable failed
    [ 2445.427890] ufshcd-qcom 1d84000.ufshc: ufshcd_host_reset_and_restore: Host init failed -5
    [ 2445.427906] ufs_device_wlun 0:0:0:49488: ufshcd_wl_resume failed: -5
    [ 2445.427918] ufs_device_wlun 0:0:0:49488: PM: dpm_run_callback(): scsi_bus_restore returns -5
    [ 2445.427973] ufs_device_wlun 0:0:0:49488: PM: failed to restore async: error -5
    
    So fix the issue by removing the code that sets the link to OFF state.
    
    Cc: Anjana Hari <quic_ahari@quicinc.com>
    Cc: stable@vger.kernel.org # 6.3
    Fixes: 88441a8d ("scsi: ufs: core: Add hibernation callbacks")
    Signed-off-by: default avatarManivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
    Link: https://lore.kernel.org/r/20240718170659.201647-1-manivannan.sadhasivam@linaro.orgReviewed-by: default avatarBart Van Assche <bvanassche@acm.org>
    Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
    ac6efb12
ufshcd.c 289 KB