vxge: transmit timeout deadlock
Use a workqueue to handle the device reset during a transmit timeout, as
there can be a deadlock during bringup. Also, set the netif carrier off
before the watchdog reset is started to prevent the timeout from
reoccurring while still processing the first.
Signed-off-by: Jon Mason <jon.mason@exar.com>
Signed-off-by: Ram Vepa <ram.vepa@exar.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/vxge/vxge-main.c b/drivers/net/vxge/vxge-main.c
index faebffb..3ec8068 100644
--- a/drivers/net/vxge/vxge-main.c
+++ b/drivers/net/vxge/vxge-main.c
@@ -1606,12 +1606,16 @@
}
if (event == VXGE_LL_FULL_RESET) {
+ netif_carrier_off(vdev->ndev);
+
/* wait for all the vpath reset to complete */
for (vp_id = 0; vp_id < vdev->no_of_vpath; vp_id++) {
while (test_bit(vp_id, &vdev->vp_reset))
msleep(50);
}
+ netif_carrier_on(vdev->ndev);
+
/* if execution mode is set to debug, don't reset the adapter */
if (unlikely(vdev->exec_mode)) {
vxge_debug_init(VXGE_ERR,
@@ -1765,9 +1769,14 @@
*
* driver may reset the chip on events of serr, eccerr, etc
*/
-static int vxge_reset(struct vxgedev *vdev)
+static void vxge_reset(struct work_struct *work)
{
- return do_vxge_reset(vdev, VXGE_LL_FULL_RESET);
+ struct vxgedev *vdev = container_of(work, struct vxgedev, reset_task);
+
+ if (!netif_running(vdev->ndev))
+ return;
+
+ do_vxge_reset(vdev, VXGE_LL_FULL_RESET);
}
/**
@@ -3111,8 +3120,7 @@
* This function is triggered if the Tx Queue is stopped
* for a pre-defined amount of time when the Interface is still up.
*/
-static void
-vxge_tx_watchdog(struct net_device *dev)
+static void vxge_tx_watchdog(struct net_device *dev)
{
struct vxgedev *vdev;
@@ -3122,7 +3130,7 @@
vdev->cric_err_event = VXGE_HW_EVENT_RESET_START;
- vxge_reset(vdev);
+ schedule_work(&vdev->reset_task);
vxge_debug_entryexit(VXGE_TRACE,
"%s:%d Exiting...", __func__, __LINE__);
}
@@ -3324,6 +3332,7 @@
ndev->netdev_ops = &vxge_netdev_ops;
ndev->watchdog_timeo = VXGE_LL_WATCH_DOG_TIMEOUT;
+ INIT_WORK(&vdev->reset_task, vxge_reset);
vxge_initialize_ethtool_ops(ndev);
diff --git a/drivers/net/vxge/vxge-main.h b/drivers/net/vxge/vxge-main.h
index 256d5b4..5746fed 100644
--- a/drivers/net/vxge/vxge-main.h
+++ b/drivers/net/vxge/vxge-main.h
@@ -395,6 +395,7 @@
u32 level_err;
u32 level_trace;
char fw_version[VXGE_HW_FW_STRLEN];
+ struct work_struct reset_task;
};
struct vxge_rx_priv {