From: John Garry <john.garry@huawei.com>
To: <jejb@linux.vnet.ibm.com>, <martin.petersen@oracle.com>
Cc: <linuxarm@huawei.com>, <zhangfei.gao@linaro.org>,
<xuwei5@hisilicon.com>, <john.garry2@mail.dcu.ie>,
<linux-scsi@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<jthumshirn@suse.de>, Xiang Chen <chenxiang66@hisilicon.com>,
John Garry <john.garry@huawei.com>
Subject: [PATCH v2 6/7] scsi: hisi_sas: fix probe ordering problem
Date: Fri, 20 Jan 2017 20:45:23 +0800 [thread overview]
Message-ID: <1484916324-211630-7-git-send-email-john.garry@huawei.com> (raw)
In-Reply-To: <1484916324-211630-1-git-send-email-john.garry@huawei.com>
From: Xiang Chen <chenxiang66@hisilicon.com>
There is a potential probe issue in how we trigger the hw initialisation.
Although we use 1s timer to delay hw initialisation, there is still a
potential that sas_register_ha() is not be finished before we start
the PHY init from hw->hw_init().
To avoid this issue, initialise the hw after sas_register_ha() in the
same probe context.
Note: it is not necessary to use 1s timer now (modified v2 hw only).
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
---
drivers/scsi/hisi_sas/hisi_sas_main.c | 8 ++++----
drivers/scsi/hisi_sas/hisi_sas_v2_hw.c | 8 ++------
2 files changed, 6 insertions(+), 10 deletions(-)
diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c
index b2782ce..8601cec 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_main.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
@@ -1552,10 +1552,6 @@ int hisi_sas_probe(struct platform_device *pdev,
hisi_sas_init_add(hisi_hba);
- rc = hisi_hba->hw->hw_init(hisi_hba);
- if (rc)
- goto err_out_ha;
-
rc = scsi_add_host(shost, &pdev->dev);
if (rc)
goto err_out_ha;
@@ -1564,6 +1560,10 @@ int hisi_sas_probe(struct platform_device *pdev,
if (rc)
goto err_out_register_ha;
+ rc = hisi_hba->hw->hw_init(hisi_hba);
+ if (rc)
+ goto err_out_register_ha;
+
scsi_scan_host(shost);
return 0;
diff --git a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
index 2e776b7..9e16f42 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
@@ -1093,9 +1093,8 @@ static void phy_hard_reset_v2_hw(struct hisi_hba *hisi_hba, int phy_no)
start_phy_v2_hw(hisi_hba, phy_no);
}
-static void start_phys_v2_hw(unsigned long data)
+static void start_phys_v2_hw(struct hisi_hba *hisi_hba)
{
- struct hisi_hba *hisi_hba = (struct hisi_hba *)data;
int i;
for (i = 0; i < hisi_hba->n_phy; i++)
@@ -1104,10 +1103,7 @@ static void start_phys_v2_hw(unsigned long data)
static void phys_init_v2_hw(struct hisi_hba *hisi_hba)
{
- struct timer_list *timer = &hisi_hba->timer;
-
- setup_timer(timer, start_phys_v2_hw, (unsigned long)hisi_hba);
- mod_timer(timer, jiffies + HZ);
+ start_phys_v2_hw(hisi_hba);
}
static void sl_notify_v2_hw(struct hisi_hba *hisi_hba, int phy_no)
--
1.9.1
next prev parent reply other threads:[~2017-01-20 12:14 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-20 12:45 [PATCH v2 0/7] hisi_sas: SATA IO workaround and other misc patches John Garry
2017-01-20 12:45 ` [PATCH v2 1/7] scsi: hisi_sas: workaround v2 hw SATA IO timeout issue John Garry
2017-01-20 12:45 ` [PATCH v2 2/7] scsi: hisi_sas: modify some values of ITCT table John Garry
2017-01-20 12:45 ` [PATCH v2 3/7] scsi: hisi_sas: downgrade refclk message John Garry
2017-01-20 12:45 ` [PATCH v2 4/7] scsi: hisi_sas: modify hard reset for directed-attached disk John Garry
2017-01-20 12:45 ` [PATCH v2 5/7] scsi: hisi_sas: downgrade internal abort exit print John Garry
2017-01-20 12:45 ` John Garry [this message]
2017-01-20 12:45 ` [PATCH v2 7/7] scsi: hisi_sas: decrease running_req in hisi_sas_slot_task_free() John Garry
2017-01-21 0:11 ` [PATCH v2 0/7] hisi_sas: SATA IO workaround and other misc patches Martin K. Petersen
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