linux-kernel - [PATCH v4 1/2] scsi: libsas: Add a helper sas_get_sas_addr_and_dev

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Message-ID: <20240307141413.48049-2-yangxingui@huawei.com>
Date: Thu, 7 Mar 2024 14:14:12 +0000
From: Xingui Yang <yangxingui@...wei.com>
To: <john.g.garry@...cle.com>, <yanaijie@...wei.com>, <jejb@...ux.ibm.com>,
	<martin.petersen@...cle.com>, <damien.lemoal@...nsource.wdc.com>
CC: <linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linuxarm@...wei.com>, <prime.zeng@...ilicon.com>,
	<chenxiang66@...ilicon.com>, <kangfenglong@...wei.com>
Subject: [PATCH v4 1/2] scsi: libsas: Add a helper sas_get_sas_addr_and_dev_type()

Add a helper to get attached_sas_addr and device type from disc_resp.

Suggested-by: John Garry <john.g.garry@...cle.com>
Signed-off-by: Xingui Yang <yangxingui@...wei.com>
Reviewed-by: John Garry <john.g.garry@...cle.com>
---
 drivers/scsi/libsas/sas_expander.c | 19 ++++++++++++-------
 1 file changed, 12 insertions(+), 7 deletions(-)

diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c
index 1eeb69cba8da..d6147616339f 100644
--- a/drivers/scsi/libsas/sas_expander.c
+++ b/drivers/scsi/libsas/sas_expander.c
@@ -1631,6 +1631,16 @@ int sas_discover_root_expander(struct domain_device *dev)
 
 /* ---------- Domain revalidation ---------- */
 
+static void sas_get_sas_addr_and_dev_type(struct smp_disc_resp *disc_resp,
+					  u8 *sas_addr,
+					  enum sas_device_type *type)
+{
+	memcpy(sas_addr, disc_resp->disc.attached_sas_addr, SAS_ADDR_SIZE);
+	*type = to_dev_type(&disc_resp->disc);
+	if (*type == SAS_PHY_UNUSED)
+		memset(sas_addr, 0, SAS_ADDR_SIZE);
+}
+
 static int sas_get_phy_discover(struct domain_device *dev,
 				int phy_id, struct smp_disc_resp *disc_resp)
 {
@@ -1684,13 +1694,8 @@ int sas_get_phy_attached_dev(struct domain_device *dev, int phy_id,
 		return -ENOMEM;
 
 	res = sas_get_phy_discover(dev, phy_id, disc_resp);
-	if (res == 0) {
-		memcpy(sas_addr, disc_resp->disc.attached_sas_addr,
-		       SAS_ADDR_SIZE);
-		*type = to_dev_type(&disc_resp->disc);
-		if (*type == 0)
-			memset(sas_addr, 0, SAS_ADDR_SIZE);
-	}
+	if (res == 0)
+		sas_get_sas_addr_and_dev_type(disc_resp, sas_addr, type);
 	kfree(disc_resp);
 	return res;
 }
-- 
2.17.1