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scsi: ufs: dump hw regs on link failures

PATCH Applied Subhash Jadavani 1 participant 1 message Feb 4, 2017 SCSI

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Subhash Jadavani

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PATCH 8/8 scsi: ufs: dump hw regs on link failures

From: Venkat Gopalakrishnan <[email protected]>

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 <[email protected]>
Signed-off-by Subhash Jadavani <[email protected]>
---
 drivers/scsi/ufs/ufshcd.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)
drivers/scsi/ufs/ufshcd.c +11 -1
index a99a673..8b721f4 100644
@@ -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;
 }
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