From: Venkat Gopalakrishnan <venkatg@codeaurora.org>
Date: Sat, 4 Feb 2017 00:58:24 +0000 (-0800)
Subject: scsi: ufs: dump hw regs on link failures
X-Git-Tag: v4.11-rc1~141^2~43
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=7942f7b568d7cda28c3aea9c81d48490769c853c;p=linux.git

scsi: ufs: dump hw regs on link failures

Dump host state, power info and host/vendor specific registers
on link failures. This provides useful info to debug the failures.

Signed-off-by: Venkat Gopalakrishnan <venkatg@codeaurora.org>
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index a99a673db71e..8b721f431dd0 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -3554,6 +3554,12 @@ static int ufshcd_uic_pwr_ctrl(struct ufs_hba *hba, struct uic_command *cmd)
 		ret = (status != PWR_OK) ? status : -1;
 	}
 out:
+	if (ret) {
+		ufshcd_print_host_state(hba);
+		ufshcd_print_pwr_info(hba);
+		ufshcd_print_host_regs(hba);
+	}
+
 	spin_lock_irqsave(hba->host->host_lock, flags);
 	hba->active_uic_cmd = NULL;
 	hba->uic_async_done = NULL;
@@ -4146,8 +4152,12 @@ static int ufshcd_link_startup(struct ufs_hba *hba)
 
 	ret = ufshcd_make_hba_operational(hba);
 out:
-	if (ret)
+	if (ret) {
 		dev_err(hba->dev, "link startup failed %d\n", ret);
+		ufshcd_print_host_state(hba);
+		ufshcd_print_pwr_info(hba);
+		ufshcd_print_host_regs(hba);
+	}
 	return ret;
 }