• Junwoo Lee's avatar
    scsi: ufs: Skip last hci reset to get valid register values · 174e909b
    Junwoo Lee authored
    Once the host link startup fails 3 times, all host registers are reset to
    default values except in ufshcd_hba_enable().
    
    The ufs host controller is disabled and enabled in ufshcd_hba_enable().
    Consequently we need to skip last hci reset to get valid host register
    values.
    
    e.g.
    [    1.898026] [2:  kworker/u16:2:  211] ufs: link startup failed 1
    [    1.898133] [2:  kworker/u16:2:  211] host_regs: 00000000: 1383ff1f 00000000 00000300 00000000
    [    1.898141] [2:  kworker/u16:2:  211] host_regs: 00000010: 00000106 000001ce 00000000 00000000
    [    1.898148] [2:  kworker/u16:2:  211] host_regs: 00000020: 00000000 00000470 00000000 00000000
    [    1.898155] [2:  kworker/u16:2:  211] host_regs: 00000030: 00000008 00000003 00000000 00000000
    [    1.898163] [2:  kworker/u16:2:  211] host_regs: 00000040: 00000000 00000000 00000000 00000000
    [    1.898171] [2:  kworker/u16:2:  211] host_regs: 00000050: 00000000 00000000 00000000 00000000
    [    1.898177] [2:  kworker/u16:2:  211] host_regs: 00000060: 00000000 00000000 00000000 00000000
    [    1.898186] [2:  kworker/u16:2:  211] host_regs: 00000070: 00000000 00000000 00000000 00000000
    [    1.898194] [2:  kworker/u16:2:  211] host_regs: 00000080: 00000000 00000000 00000000 00000000
    [    1.898201] [2:  kworker/u16:2:  211] host_regs: 00000090: 00000000 00000000 00000000 00000000
    
    Link: https://lore.kernel.org/r/20220705083538.15143-1-sh043.lee@samsung.comReviewed-by: default avatarAvri Altman <avri.altman@wdc.com>
    Signed-off-by: default avatarJunwoo Lee <junwoo80.lee@samsung.com>
    Signed-off-by: default avatarSeunghui Lee <sh043.lee@samsung.com>
    Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
    174e909b
ufshcd.c 268 KB