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Date:   Tue, 23 May 2023 21:41:26 +0000
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Subject: [PATCH 1/2] scsi: pm80xx: Add fatal error check for pm8001_phy_control()
From:   Pranav Prasad <pranavpp@google.com>
To:     Jack Wang <jinpu.wang@cloud.ionos.com>,
        "James E . J . Bottomley" <jejb@linux.ibm.com>,
        "Martin K . Petersen" <martin.petersen@oracle.com>
Cc:     linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org,
        Changyuan Lyu <changyuanl@google.com>,
        Pranav Prasad <pranavpp@google.com>
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From: Changyuan Lyu <changyuanl@google.com>

This patch adds a fatal error check for the pm8001_phy_control() function.

Signed-off-by: Changyuan Lyu <changyuanl@google.com>
Signed-off-by: Pranav Prasad <pranavpp@google.com>
---
 drivers/scsi/pm8001/pm8001_sas.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/scsi/pm8001/pm8001_sas.c b/drivers/scsi/pm8001/pm8001_sas.c
index e5673c774f66..b153f0966e5d 100644
--- a/drivers/scsi/pm8001/pm8001_sas.c
+++ b/drivers/scsi/pm8001/pm8001_sas.c
@@ -167,6 +167,16 @@ int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func,
 	pm8001_ha = sas_phy->ha->lldd_ha;
 	phy = &pm8001_ha->phy[phy_id];
 	pm8001_ha->phy[phy_id].enable_completion = &completion;
+
+	if (PM8001_CHIP_DISP->fatal_errors(pm8001_ha)) {
+		/* If the controller is in fatal error state,
+		 *  we will not get a response from the controller
+		 */
+		pm8001_dbg(pm8001_ha, FAIL,
+				"Phy control failed due to fatal errors\n");
+		return -EFAULT;
+	}
+
 	switch (func) {
 	case PHY_FUNC_SET_LINK_RATE:
 		rates = funcdata;
-- 
2.40.1.698.g37aff9b760-goog