[PATCH v3 05/15] scsi: ufs: increase fDeviceInit query response timeout

Path	csiph.com!au2pb.net!feeder.erje.net!1.eu.feeder.erje.net!weretis.net!feeder1.news.weretis.net!newsfeed.CARNet.hr!news.spin.it!bofh.it!news.nic.it!robomod
From	Yaniv Gardi <ygardi@codeaurora.org>
Newsgroups	linux.kernel
Subject	[PATCH v3 05/15] scsi: ufs: increase fDeviceInit query response timeout
Date	Wed, 02 Sep 2015 12:20:02 +0200
Message-ID	<q4dj4-25N-29@gated-at.bofh.it> (permalink)
References	<q4dj3-25N-3@gated-at.bofh.it>
X-Original-To	robherring2@gmail.com, James.Bottomley@HansenPartnership.com, pebolle@tiscali.nl, hch@infradead.org
X-Mailer	git-send-email 1.8.5.2
Sender	robomod@news.nic.it
List-ID	<linux-kernel.vger.kernel.org>
X-Mailing-List	linux-kernel@vger.kernel.org
Approved	robomod@news.nic.it
Lines	61
Organization	linux.* mail to news gateway
X-Original-Cc	linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, linux-arm-msm@vger.kernel.org, santoshsy@gmail.com, linux-scsi-owner@vger.kernel.org, subhashj@codeaurora.org, ygardi@codeaurora.org, gbroner@codeaurora.org, draviv@codeaurora.org, Vinayak Holikatti <vinholikatti@gmail.com>, "James E.J. Bottomley" <JBottomley@odin.com>
X-Original-Date	Wed, 2 Sep 2015 13:13:05 +0300
X-Original-Message-ID	<1441188795-4600-6-git-send-email-ygardi@codeaurora.org>
X-Original-References	<1441188795-4600-1-git-send-email-ygardi@codeaurora.org>
X-Original-Sender	linux-kernel-owner@vger.kernel.org
Xref	csiph.com linux.kernel:1217490

Show key headers only | View raw

fDeviceInit query response time for some devices is too long that default
query request timeout of 100ms may not be enough. Experiments show that
fDeviceInit response sometimes takes 500ms so to be on safer side this
change sets the timeout to 600ms. Without this change, we might
unnecessarily have to retry fDeviceInit query requests multiple times and
each query request timeout prints one error message.

Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: Yaniv Gardi <ygardi@codeaurora.org>

---
 drivers/scsi/ufs/ufshcd.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index e0b8755..573a8cb 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -58,6 +58,12 @@
 #define QUERY_REQ_RETRIES 10
 /* Query request timeout */
 #define QUERY_REQ_TIMEOUT 30 /* msec */
+/*
+ * Query request timeout for fDeviceInit flag
+ * fDeviceInit query response time for some devices is too large that default
+ * QUERY_REQ_TIMEOUT may not be enough for such devices.
+ */
+#define QUERY_FDEVICEINIT_REQ_TIMEOUT 600 /* msec */
 
 /* Task management command timeout */
 #define TM_CMD_TIMEOUT	100 /* msecs */
@@ -1651,6 +1657,7 @@ static int ufshcd_query_flag(struct ufs_hba *hba, enum query_opcode opcode,
 	struct ufs_query_req *request = NULL;
 	struct ufs_query_res *response = NULL;
 	int err, index = 0, selector = 0;
+	int timeout = QUERY_REQ_TIMEOUT;
 
 	BUG_ON(!hba);
 
@@ -1683,7 +1690,10 @@ static int ufshcd_query_flag(struct ufs_hba *hba, enum query_opcode opcode,
 		goto out_unlock;
 	}
 
-	err = ufshcd_exec_dev_cmd(hba, DEV_CMD_TYPE_QUERY, QUERY_REQ_TIMEOUT);
+	if (idn == QUERY_FLAG_IDN_FDEVICEINIT)
+		timeout = QUERY_FDEVICEINIT_REQ_TIMEOUT;
+
+	err = ufshcd_exec_dev_cmd(hba, DEV_CMD_TYPE_QUERY, timeout);
 
 	if (err) {
 		dev_err(hba->dev,
-- 
1.8.5.2

-- 
QUALCOMM ISRAEL, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next | Find similar | Unroll thread

Thread

[PATCH v3 05/15] scsi: ufs: increase fDeviceInit query response timeout Yaniv Gardi <ygardi@codeaurora.org> - 2015-09-02 12:20 +0200

csiph-web