From: John Garry <john.garry@huawei.com>
To: <jejb@linux.vnet.ibm.com>, <martin.petersen@oracle.com>
Cc: <linux-scsi@vger.kernel.org>, <linuxarm@huawei.com>,
<linux-kernel@vger.kernel.org>,
Luo Jiaxing <luojiaxing@huawei.com>,
"John Garry" <john.garry@huawei.com>
Subject: [PATCH 08/13] scsi: hisi_sas: Reject setting programmed minimum linkrate > 1.5G
Date: Fri, 25 Jan 2019 22:22:34 +0800 [thread overview]
Message-ID: <1548426159-225679-9-git-send-email-john.garry@huawei.com> (raw)
In-Reply-To: <1548426159-225679-1-git-send-email-john.garry@huawei.com>
From: Luo Jiaxing <luojiaxing@huawei.com>
The SAS controller cannot support a programmed minimum linkrate of
> 1.5G (it will always negotiate to 1.5G at least), so just reject it.
This solves a strange situation where the PHY negotiated linkrate may
be less than the programmed minimum linkrate.
Signed-off-by: Luo Jiaxing <luojiaxing@huawei.com>
Signed-off-by: John Garry <john.garry@huawei.com>
---
drivers/scsi/hisi_sas/hisi_sas_main.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c
index 8f7f82d..32f6928 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_main.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
@@ -946,7 +946,7 @@ static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
}
-static void hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no,
+static int hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no,
struct sas_phy_linkrates *r)
{
struct sas_phy_linkrates _r;
@@ -955,6 +955,9 @@ static void hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no,
struct asd_sas_phy *sas_phy = &phy->sas_phy;
enum sas_linkrate min, max;
+ if (r->minimum_linkrate > SAS_LINK_RATE_1_5_GBPS)
+ return -EINVAL;
+
if (r->maximum_linkrate == SAS_LINK_RATE_UNKNOWN) {
max = sas_phy->phy->maximum_linkrate;
min = r->minimum_linkrate;
@@ -962,7 +965,7 @@ static void hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no,
max = r->maximum_linkrate;
min = sas_phy->phy->minimum_linkrate;
} else
- return;
+ return -EINVAL;
_r.maximum_linkrate = max;
_r.minimum_linkrate = min;
@@ -974,6 +977,8 @@ static void hisi_sas_phy_set_linkrate(struct hisi_hba *hisi_hba, int phy_no,
msleep(100);
hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, &_r);
hisi_hba->hw->phy_start(hisi_hba, phy_no);
+
+ return 0;
}
static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
@@ -999,8 +1004,7 @@ static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
break;
case PHY_FUNC_SET_LINK_RATE:
- hisi_sas_phy_set_linkrate(hisi_hba, phy_no, funcdata);
- break;
+ return hisi_sas_phy_set_linkrate(hisi_hba, phy_no, funcdata);
case PHY_FUNC_GET_EVENTS:
if (hisi_hba->hw->get_events) {
hisi_hba->hw->get_events(hisi_hba, phy_no);
--
1.9.1
next prev parent reply other threads:[~2019-01-25 14:23 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-25 14:22 [PATCH 00/13] hisi_sas: Misc fixes and other more minor patches John Garry
2019-01-25 14:22 ` [PATCH 01/13] scsi: hisi_sas: No need to check return value of debugfs_create functions John Garry
2019-01-25 14:22 ` [PATCH 02/13] scsi: hisi_sas: Fix type casting and missing static qualifier in debugfs code John Garry
2019-01-25 14:22 ` [PATCH 03/13] scsi: hisi_sas: Add debugfs ITCT file and add file operations John Garry
2019-01-25 14:22 ` [PATCH 04/13] scsi: hisi_sas: send primitive NOTIFY to SSP situation only John Garry
2019-01-25 14:22 ` [PATCH 05/13] scsi: hisi_sas: shutdown axi bus to avoid exception CQ returned John Garry
2019-01-25 14:22 ` [PATCH 06/13] scsi: hisi_sas: remove the check of sas_dev status in hisi_sas_I_T_nexus_reset() John Garry
2019-01-25 14:22 ` [PATCH 07/13] scsi: hisi_sas: Remove unused parameter of function hisi_sas_alloc() John Garry
2019-01-25 14:22 ` John Garry [this message]
2019-01-25 14:22 ` [PATCH 09/13] scsi: hisi_sas: Fix losing directly attached disk when hot-plug John Garry
2019-01-25 14:22 ` [PATCH 10/13] scsi: hisi_sas: Correct memory allocation size for DQ debugfs John Garry
2019-01-25 14:22 ` [PATCH 11/13] scsi: hisi_sas: Some misc tidy-up John Garry
2019-01-25 14:22 ` [PATCH 12/13] scsi: hisi_sas: Fix to only call scsi_get_prot_op() for non-NULL scsi_cmnd John Garry
2019-01-25 14:22 ` [PATCH 13/13] scsi: hisi_sas: Add missing seq_printf() call in hisi_sas_show_row_32() John Garry
2019-01-29 6:43 ` [PATCH 00/13] hisi_sas: Misc fixes and other more minor patches Martin K. Petersen
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