From: Lang Cheng <chenglang@huawei.com>
Date: Fri, 24 May 2019 15:31:22 +0800
Subject: RDMA/hns: Move spin_lock_irqsave to the correct place
Patch-mainline: v5.3-rc1
Git-commit: 780f33962ef27d7f27c6b47a55593c6ffd357922
References: bsc#1104427 FATE#326416 bsc#1137236
When hip08 set gid, it will call spin_unlock_bh when send cmq. if main.ko
call spin_lock_irqsave firstly, and the kernel is before commit
f71b74bca637 ("irq/softirqs: Use lockdep to assert IRQs are
disabled/enabled"), it will cause WARN_ON_ONCE because of calling
spin_unlock_bh in disable context.
In fact, the spin_lock_irqsave in main.ko is only used for hip06, and
should be placed in hns_roce_hw_v1.c. hns_roce_hw_v2.c uses its own
spin_unlock_bh and does not need main.ko manage spin_lock.
Signed-off-by: Lang Cheng <chenglang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/infiniband/hw/hns/hns_roce_hw_v1.c | 5 +++++
drivers/infiniband/hw/hns/hns_roce_main.c | 10 ----------
2 files changed, 5 insertions(+), 10 deletions(-)
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
@@ -1780,11 +1780,14 @@ static int hns_roce_v1_set_gid(struct hn
int gid_index, const union ib_gid *gid,
const struct ib_gid_attr *attr)
{
+ unsigned long flags;
u32 *p = NULL;
u8 gid_idx = 0;
gid_idx = hns_get_gid_index(hr_dev, port, gid_index);
+ spin_lock_irqsave(&hr_dev->iboe.lock, flags);
+
p = (u32 *)&gid->raw[0];
roce_raw_write(*p, hr_dev->reg_base + ROCEE_PORT_GID_L_0_REG +
(HNS_ROCE_V1_GID_NUM * gid_idx));
@@ -1801,6 +1804,8 @@ static int hns_roce_v1_set_gid(struct hn
roce_raw_write(*p, hr_dev->reg_base + ROCEE_PORT_GID_H_0_REG +
(HNS_ROCE_V1_GID_NUM * gid_idx));
+ spin_unlock_irqrestore(&hr_dev->iboe.lock, flags);
+
return 0;
}
--- a/drivers/infiniband/hw/hns/hns_roce_main.c
+++ b/drivers/infiniband/hw/hns/hns_roce_main.c
@@ -78,18 +78,13 @@ static int hns_roce_add_gid(const struct
{
struct hns_roce_dev *hr_dev = to_hr_dev(attr->device);
u8 port = attr->port_num - 1;
- unsigned long flags;
int ret;
if (port >= hr_dev->caps.num_ports)
return -EINVAL;
- spin_lock_irqsave(&hr_dev->iboe.lock, flags);
-
ret = hr_dev->hw->set_gid(hr_dev, port, attr->index, &attr->gid, attr);
- spin_unlock_irqrestore(&hr_dev->iboe.lock, flags);
-
return ret;
}
@@ -98,18 +93,13 @@ static int hns_roce_del_gid(const struct
struct hns_roce_dev *hr_dev = to_hr_dev(attr->device);
struct ib_gid_attr zattr = { };
u8 port = attr->port_num - 1;
- unsigned long flags;
int ret;
if (port >= hr_dev->caps.num_ports)
return -EINVAL;
- spin_lock_irqsave(&hr_dev->iboe.lock, flags);
-
ret = hr_dev->hw->set_gid(hr_dev, port, attr->index, &zgid, &zattr);
- spin_unlock_irqrestore(&hr_dev->iboe.lock, flags);
-
return ret;
}