Intel controllers can end up in an unrecoverable state after a hibernate
exit error unless a full reset and restore is done before anything else.
Force that to happen.
Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
---
drivers/scsi/ufs/ufshcd-pci.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/drivers/scsi/ufs/ufshcd-pci.c b/drivers/scsi/ufs/ufshcd-pci.c
index 5d33c39fa82f..888d8c9ca3a5 100644
--- a/drivers/scsi/ufs/ufshcd-pci.c
+++ b/drivers/scsi/ufs/ufshcd-pci.c
@@ -178,6 +178,23 @@ static int ufs_intel_resume(struct ufs_hba *hba, enum ufs_pm_op op)
REG_UTP_TASK_REQ_LIST_BASE_L);
ufshcd_writel(hba, upper_32_bits(hba->utmrdl_dma_addr),
REG_UTP_TASK_REQ_LIST_BASE_H);
+
+ if (ufshcd_is_link_hibern8(hba)) {
+ int ret = ufshcd_uic_hibern8_exit(hba);
+
+ if (!ret) {
+ ufshcd_set_link_active(hba);
+ } else {
+ dev_err(hba->dev, "%s: hibern8 exit failed %d\n",
+ __func__, ret);
+ /*
+ * Force reset and restore. Any other actions can lead
+ * to an unrecoverable state.
+ */
+ ufshcd_set_link_off(hba);
+ }
+ }
+
return 0;
}
--
2.17.1
