diff options
Diffstat (limited to 'drivers/ufs/core/ufshcd.c')
| -rw-r--r-- | drivers/ufs/core/ufshcd.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c index a6026cc4b2f4..1aad1c03c3fc 100644 --- a/drivers/ufs/core/ufshcd.c +++ b/drivers/ufs/core/ufshcd.c @@ -5218,6 +5218,35 @@ void ufshcd_update_evt_hist(struct ufs_hba *hba, u32 id, u32 val) } EXPORT_SYMBOL_GPL(ufshcd_update_evt_hist); +static int ufshcd_validate_link_params(struct ufs_hba *hba) +{ + int ret, val; + + ret = ufshcd_dme_get(hba, UIC_ARG_MIB(PA_CONNECTEDTXDATALANES), + &val); + if (ret) + return ret; + + if (val != hba->lanes_per_direction) { + dev_err(hba->dev, "Tx lane mismatch [config,reported] [%d,%d]\n", + hba->lanes_per_direction, val); + return -ENOLINK; + } + + ret = ufshcd_dme_get(hba, UIC_ARG_MIB(PA_CONNECTEDRXDATALANES), + &val); + if (ret) + return ret; + + if (val != hba->lanes_per_direction) { + dev_err(hba->dev, "Rx lane mismatch [config,reported] [%d,%d]\n", + hba->lanes_per_direction, val); + return -ENOLINK; + } + + return 0; +} + /** * ufshcd_link_startup - Initialize unipro link startup * @hba: per adapter instance @@ -5291,6 +5320,10 @@ link_startup: goto out; } + ret = ufshcd_validate_link_params(hba); + if (ret) + goto out; + /* Include any host controller configuration via UIC commands */ ret = ufshcd_vops_link_startup_notify(hba, POST_CHANGE); if (ret) |