cddd459140
Add patches for linux-5.4. The patches are from NXP LSDK-20.04 release which was tagged LSDK-20.04-V5.4. https://source.codeaurora.org/external/qoriq/qoriq-components/linux/ For boards LS1021A-IOT, and Traverse-LS1043 which are not involved in LSDK, port the dts patches from 4.14. The patches are sorted into the following categories: 301-arch-xxxx 302-dts-xxxx 303-core-xxxx 701-net-xxxx 801-audio-xxxx 802-can-xxxx 803-clock-xxxx 804-crypto-xxxx 805-display-xxxx 806-dma-xxxx 807-gpio-xxxx 808-i2c-xxxx 809-jailhouse-xxxx 810-keys-xxxx 811-kvm-xxxx 812-pcie-xxxx 813-pm-xxxx 814-qe-xxxx 815-sata-xxxx 816-sdhc-xxxx 817-spi-xxxx 818-thermal-xxxx 819-uart-xxxx 820-usb-xxxx 821-vfio-xxxx Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
137 lines
3.4 KiB
Diff
137 lines
3.4 KiB
Diff
From 0af5d7d021bb899d9c3880415267e178a20fb7a9 Mon Sep 17 00:00:00 2001
|
|
From: Mans Rullgard <mans@mansr.com>
|
|
Date: Thu, 24 Nov 2016 18:46:41 +0000
|
|
Subject: [PATCH] ivshmem-net: fix race in state machine
|
|
|
|
(cherry picked from commit 5d663baed6a89d09bae4446f6509f9957c780bc7)
|
|
---
|
|
drivers/net/ivshmem-net.c | 60 ++++++++++++++++++++++++-----------------------
|
|
1 file changed, 31 insertions(+), 29 deletions(-)
|
|
|
|
--- a/drivers/net/ivshmem-net.c
|
|
+++ b/drivers/net/ivshmem-net.c
|
|
@@ -36,6 +36,8 @@
|
|
#define IVSHM_NET_STATE_READY 2
|
|
#define IVSHM_NET_STATE_RUN 3
|
|
|
|
+#define IVSHM_NET_FLAG_RUN 0
|
|
+
|
|
#define IVSHM_NET_MTU_MIN 256
|
|
#define IVSHM_NET_MTU_MAX 65535
|
|
#define IVSHM_NET_MTU_DEF 16384
|
|
@@ -96,6 +98,8 @@ struct ivshm_net {
|
|
u32 lstate;
|
|
u32 rstate;
|
|
|
|
+ unsigned long flags;
|
|
+
|
|
struct workqueue_struct *state_wq;
|
|
struct work_struct state_work;
|
|
|
|
@@ -529,12 +533,32 @@ static void ivshm_net_run(struct net_dev
|
|
{
|
|
struct ivshm_net *in = netdev_priv(ndev);
|
|
|
|
+ if (in->lstate < IVSHM_NET_STATE_READY)
|
|
+ return;
|
|
+
|
|
+ if (!netif_running(ndev))
|
|
+ return;
|
|
+
|
|
+ if (test_and_set_bit(IVSHM_NET_FLAG_RUN, &in->flags))
|
|
+ return;
|
|
+
|
|
netif_start_queue(ndev);
|
|
napi_enable(&in->napi);
|
|
napi_schedule(&in->napi);
|
|
ivshm_net_set_state(in, IVSHM_NET_STATE_RUN);
|
|
}
|
|
|
|
+static void ivshm_net_do_stop(struct net_device *ndev)
|
|
+{
|
|
+ struct ivshm_net *in = netdev_priv(ndev);
|
|
+
|
|
+ if (!test_and_clear_bit(IVSHM_NET_FLAG_RUN, &in->flags))
|
|
+ return;
|
|
+
|
|
+ netif_stop_queue(ndev);
|
|
+ napi_disable(&in->napi);
|
|
+}
|
|
+
|
|
static void ivshm_net_state_change(struct work_struct *work)
|
|
{
|
|
struct ivshm_net *in = container_of(work, struct ivshm_net, state_work);
|
|
@@ -560,21 +584,13 @@ static void ivshm_net_state_change(struc
|
|
break;
|
|
|
|
case IVSHM_NET_STATE_READY:
|
|
+ case IVSHM_NET_STATE_RUN:
|
|
if (rstate >= IVSHM_NET_STATE_READY) {
|
|
netif_carrier_on(ndev);
|
|
- if (ndev->flags & IFF_UP)
|
|
- ivshm_net_run(ndev);
|
|
+ ivshm_net_run(ndev);
|
|
} else {
|
|
netif_carrier_off(ndev);
|
|
- ivshm_net_set_state(in, IVSHM_NET_STATE_RESET);
|
|
- }
|
|
- break;
|
|
-
|
|
- case IVSHM_NET_STATE_RUN:
|
|
- if (rstate < IVSHM_NET_STATE_READY) {
|
|
- netif_stop_queue(ndev);
|
|
- napi_disable(&in->napi);
|
|
- netif_carrier_off(ndev);
|
|
+ ivshm_net_do_stop(ndev);
|
|
ivshm_net_set_state(in, IVSHM_NET_STATE_RESET);
|
|
}
|
|
break;
|
|
@@ -584,18 +600,13 @@ static void ivshm_net_state_change(struc
|
|
WRITE_ONCE(in->rstate, rstate);
|
|
}
|
|
|
|
-static bool ivshm_net_check_state(struct net_device *ndev)
|
|
+static void ivshm_net_check_state(struct net_device *ndev)
|
|
{
|
|
struct ivshm_net *in = netdev_priv(ndev);
|
|
u32 rstate = readl(&in->ivshm_regs->rstate);
|
|
|
|
- if (rstate != READ_ONCE(in->rstate) ||
|
|
- in->lstate != IVSHM_NET_STATE_RUN) {
|
|
+ if (rstate != in->rstate || !test_bit(IVSHM_NET_FLAG_RUN, &in->flags))
|
|
queue_work(in->state_wq, &in->state_work);
|
|
- return false;
|
|
- }
|
|
-
|
|
- return true;
|
|
}
|
|
|
|
static irqreturn_t ivshm_net_int(int irq, void *data)
|
|
@@ -617,24 +628,15 @@ static int ivshm_net_open(struct net_dev
|
|
|
|
netdev_reset_queue(ndev);
|
|
ndev->operstate = IF_OPER_UP;
|
|
-
|
|
- if (in->lstate == IVSHM_NET_STATE_READY)
|
|
- ivshm_net_run(ndev);
|
|
+ ivshm_net_run(ndev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ivshm_net_stop(struct net_device *ndev)
|
|
{
|
|
- struct ivshm_net *in = netdev_priv(ndev);
|
|
-
|
|
ndev->operstate = IF_OPER_DOWN;
|
|
-
|
|
- if (in->lstate == IVSHM_NET_STATE_RUN) {
|
|
- napi_disable(&in->napi);
|
|
- netif_stop_queue(ndev);
|
|
- ivshm_net_set_state(in, IVSHM_NET_STATE_READY);
|
|
- }
|
|
+ ivshm_net_do_stop(ndev);
|
|
|
|
return 0;
|
|
}
|