diff options
| author | Maarten Lankhorst <maarten.lankhorst@linux.intel.com> | 2023-04-12 12:01:32 +0200 |
|---|---|---|
| committer | Maarten Lankhorst <maarten.lankhorst@linux.intel.com> | 2023-04-12 12:01:32 +0200 |
| commit | 5603effb8295ada8419408d038a34ca89d658229 (patch) | |
| tree | b06d8e309631d507c7b030e943b8479e2d15250b /net/core/netpoll.c | |
| parent | b89ce1177d42d5c124e83f3858818cd4e6a2c46f (diff) | |
| parent | 09a9639e56c01c7a00d6c0ca63f4c7c41abe075d (diff) | |
Merge remote-tracking branch 'drm/drm-fixes' into drm-misc-fixes
We were stuck on rc2, should at least attempt to track drm-fixes
slightly.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Diffstat (limited to 'net/core/netpoll.c')
| -rw-r--r-- | net/core/netpoll.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/net/core/netpoll.c b/net/core/netpoll.c index a089b704b986..e6a739b1afa9 100644 --- a/net/core/netpoll.c +++ b/net/core/netpoll.c @@ -137,6 +137,20 @@ static void queue_process(struct work_struct *work) } } +static int netif_local_xmit_active(struct net_device *dev) +{ + int i; + + for (i = 0; i < dev->num_tx_queues; i++) { + struct netdev_queue *txq = netdev_get_tx_queue(dev, i); + + if (READ_ONCE(txq->xmit_lock_owner) == smp_processor_id()) + return 1; + } + + return 0; +} + static void poll_one_napi(struct napi_struct *napi) { int work; @@ -183,7 +197,10 @@ void netpoll_poll_dev(struct net_device *dev) if (!ni || down_trylock(&ni->dev_lock)) return; - if (!netif_running(dev)) { + /* Some drivers will take the same locks in poll and xmit, + * we can't poll if local CPU is already in xmit. + */ + if (!netif_running(dev) || netif_local_xmit_active(dev)) { up(&ni->dev_lock); return; } |