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| author |   Dolev Raviv <draviv@codeaurora.org> | 2016-11-23 16:32:32 -0800 |
|---|---|---|
| committer |   Martin K. Petersen <martin.petersen@oracle.com> | 2016-11-29 12:06:56 -0500 |
| commit | fb7b45f0462f144e1924a357995552f24f0c9d0c (patch) | |
| tree | 95d1686959d5d24c03fdd766207be705463c5616 /drivers/scsi/ufs/ufshcd.c | |
| parent | scsi: ufs: issue link starup 2 times if device isn't active (diff) | |
| download | linux-dev-fb7b45f0462f144e1924a357995552f24f0c9d0c.tar.xz linux-dev-fb7b45f0462f144e1924a357995552f24f0c9d0c.zip | |
scsi: ufs: handle errors from PHY_ADAPTER_ERROR register
The PHY_ADAPTER_ERROR status register indicates PHY lane errors
reported by the M-PHY layer. In some occasions the controller
can recover from such errors. When the error is not recoverable,
a stuck DB error will occur. Since the stuck DB error is spotted
separately, no action other than clearing the register is necessary.
Signed-off-by: Dolev Raviv <draviv@codeaurora.org>
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/ufs/ufshcd.c')
| -rw-r--r-- | drivers/scsi/ufs/ufshcd.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 16c5c50d054d..ec4c99ab6a91 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -4215,6 +4215,17 @@ static void ufshcd_update_uic_error(struct ufs_hba *hba) { u32 reg; + /* PHY layer lane error */ + reg = ufshcd_readl(hba, REG_UIC_ERROR_CODE_PHY_ADAPTER_LAYER); + /* Ignore LINERESET indication, as this is not an error */ + if ((reg & UIC_PHY_ADAPTER_LAYER_ERROR) && + (reg & UIC_PHY_ADAPTER_LAYER_LANE_ERR_MASK)) + /* + * To know whether this error is fatal or not, DB timeout + * must be checked but this error is handled separately. + */ + dev_dbg(hba->dev, "%s: UIC Lane error reported\n", __func__); + /* PA_INIT_ERROR is fatal and needs UIC reset */ reg = ufshcd_readl(hba, REG_UIC_ERROR_CODE_DATA_LINK_LAYER); if (reg & UIC_DATA_LINK_LAYER_ERROR_PA_INIT) |