[PATCH 5.6 042/194] hinic: fix a bug of ndo_stop

Greg Kroah-Hartman
2020-05-18T18:12:48Z

From: Luo bin <luobin9@huawei.com>

[ Upstream commit e8a1b0efd632d1c9db7d4e93da66377c7b524862 ]

if some function in ndo_stop interface returns failure because of
hardware fault, must go on excuting rest steps rather than return
failure directly, otherwise will cause memory leak.And bump the
timeout for SET_FUNC_STATE to ensure that cmd won't return failure
when hw is busy. Otherwise hw may stomp host memory if we free
memory regardless of the return value of SET_FUNC_STATE.

Fixes: 51ba902a16e6 ("net-next/hinic: Initialize hw interface")
Signed-off-by: Luo bin <luobin9@huawei.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/ethernet/huawei/hinic/hinic_hw_mgmt.c | 16 ++++++++++++----
drivers/net/ethernet/huawei/hinic/hinic_main.c | 18 +++---------------
2 files changed, 15 insertions(+), 19 deletions(-)

--- a/drivers/net/ethernet/huawei/hinic/hinic_hw_mgmt.c
+++ b/drivers/net/ethernet/huawei/hinic/hinic_hw_mgmt.c
@@ -45,6 +45,8 @@

#define MGMT_MSG_TIMEOUT 5000

+#define SET_FUNC_PORT_MGMT_TIMEOUT 25000
+
#define mgmt_to_pfhwdev(pf_mgmt) \
container_of(pf_mgmt, struct hinic_pfhwdev, pf_to_mgmt)

@@ -238,12 +240,13 @@ static int msg_to_mgmt_sync(struct hinic
u8 *buf_in, u16 in_size,
u8 *buf_out, u16 *out_size,
enum mgmt_direction_type direction,
- u16 resp_msg_id)
+ u16 resp_msg_id, u32 timeout)
{
struct hinic_hwif *hwif = pf_to_mgmt->hwif;
struct pci_dev *pdev = hwif->pdev;
struct hinic_recv_msg *recv_msg;
struct completion *recv_done;
+ unsigned long timeo;
u16 msg_id;
int err;

@@ -267,8 +270,9 @@ static int msg_to_mgmt_sync(struct hinic
goto unlock_sync_msg;
}

- if (!wait_for_completion_timeout(recv_done,
- msecs_to_jiffies(MGMT_MSG_TIMEOUT))) {
+ timeo = msecs_to_jiffies(timeout ? timeout : MGMT_MSG_TIMEOUT);
+
+ if (!wait_for_completion_timeout(recv_done, timeo)) {
dev_err(&pdev->dev, "MGMT timeout, MSG id = %d\n", msg_id);
err = -ETIMEDOUT;
goto unlock_sync_msg;
@@ -342,6 +346,7 @@ int hinic_msg_to_mgmt(struct hinic_pf_to
{
struct hinic_hwif *hwif = pf_to_mgmt->hwif;
struct pci_dev *pdev = hwif->pdev;
+ u32 timeout = 0;

if (sync != HINIC_MGMT_MSG_SYNC) {
dev_err(&pdev->dev, "Invalid MGMT msg type\n");
@@ -353,9 +358,12 @@ int hinic_msg_to_mgmt(struct hinic_pf_to
return -EINVAL;
}

+ if (cmd == HINIC_PORT_CMD_SET_FUNC_STATE)
+ timeout = SET_FUNC_PORT_MGMT_TIMEOUT;
+
return msg_to_mgmt_sync(pf_to_mgmt, mod, cmd, buf_in, in_size,
buf_out, out_size, MGMT_DIRECT_SEND,
- MSG_NOT_RESP);
+ MSG_NOT_RESP, timeout);
}

/**
--- a/drivers/net/ethernet/huawei/hinic/hinic_main.c
+++ b/drivers/net/ethernet/huawei/hinic/hinic_main.c
@@ -483,7 +483,6 @@ static int hinic_close(struct net_device
{
struct hinic_dev *nic_dev = netdev_priv(netdev);
unsigned int flags;
- int err;

down(&nic_dev->mgmt_lock);

@@ -497,20 +496,9 @@ static int hinic_close(struct net_device

up(&nic_dev->mgmt_lock);

- err = hinic_port_set_func_state(nic_dev, HINIC_FUNC_PORT_DISABLE);
- if (err) {
- netif_err(nic_dev, drv, netdev,
- "Failed to set func port state\n");
- nic_dev->flags |= (flags & HINIC_INTF_UP);
- return err;
- }
-
- err = hinic_port_set_state(nic_dev, HINIC_PORT_DISABLE);
- if (err) {
- netif_err(nic_dev, drv, netdev, "Failed to set port state\n");
- nic_dev->flags |= (flags & HINIC_INTF_UP);
- return err;
- }
+ hinic_port_set_state(nic_dev, HINIC_PORT_DISABLE);
+
+ hinic_port_set_func_state(nic_dev, HINIC_FUNC_PORT_DISABLE);

if (nic_dev->flags & HINIC_RSS_ENABLE) {
hinic_rss_deinit(nic_dev);