linux-kernel - [PATCH v1 2/2] scsi: ufs: qcom: Update the UIC Command Timeout

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Message-ID: <8e5593feaac75660ff132d67ee5d9130e628fefb.1716359578.git.quic_nguyenb@quicinc.com>
Date: Wed, 22 May 2024 00:01:28 -0700
From: "Bao D. Nguyen" <quic_nguyenb@...cinc.com>
To: <quic_cang@...cinc.com>, <quic_nitirawa@...cinc.com>, <bvanassche@....org>,
        <avri.altman@....com>, <beanhuo@...ron.com>, <adrian.hunter@...el.com>,
        <martin.petersen@...cle.com>
CC: <linux-scsi@...r.kernel.org>, "Bao D. Nguyen" <quic_nguyenb@...cinc.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio
	<konrad.dybcio@...aro.org>,
        Manivannan Sadhasivam
	<manivannan.sadhasivam@...aro.org>,
        "James E.J. Bottomley"
	<jejb@...ux.ibm.com>,
        "open list:ARM/QUALCOMM SUPPORT"
	<linux-arm-msm@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: [PATCH v1 2/2] scsi: ufs: qcom: Update the UIC Command Timeout

Change the UIC command timeout to 2 seconds.
This extra time is to allow the uart occasionally print long
debug messages and logging from different modules during
product development. With the default hardcoded 500ms timeout,
the uart printing with interrupt disabled may cause the UIC command
interrupt get starved, resulting in a UIC command timeout and
eventually a watchdog timeout.
When a product development completes, the vendors may
select a different UIC command timeout as desired.

Signed-off-by: Bao D. Nguyen <quic_nguyenb@...cinc.com>
---
 drivers/ufs/host/ufs-qcom.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
index 79f8cb3..4649e0f 100644
--- a/drivers/ufs/host/ufs-qcom.c
+++ b/drivers/ufs/host/ufs-qcom.c
@@ -49,6 +49,7 @@ enum {
 
 #define QCOM_UFS_MAX_GEAR 4
 #define QCOM_UFS_MAX_LANE 2
+#define QCOM_UIC_CMD_TIMEOUT_MS 2000
 
 enum {
 	MODE_MIN,
@@ -1111,6 +1112,8 @@ static int ufs_qcom_init(struct ufs_hba *hba)
 		dev_warn(dev, "%s: failed to configure the testbus %d\n",
 				__func__, err);
 
+	hba->uic_cmd_timeout = QCOM_UIC_CMD_TIMEOUT_MS;
+
 	return 0;
 
 out_variant_clear:
-- 
2.7.4