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author | David S. Miller <davem@davemloft.net> | 2017-10-22 13:36:53 +0100 |
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committer | David S. Miller <davem@davemloft.net> | 2017-10-22 13:39:14 +0100 |
commit | f8ddadc4db6c7b7029b6d0e0d9af24f74ad27ca2 (patch) | |
tree | 0a6432aba336bae42313613f4c891bcfce02bd4e /drivers/hv/channel_mgmt.c | |
parent | Merge branch 'tun-timer-cleanups' (diff) | |
parent | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net (diff) | |
download | linux-dev-f8ddadc4db6c7b7029b6d0e0d9af24f74ad27ca2.tar.xz linux-dev-f8ddadc4db6c7b7029b6d0e0d9af24f74ad27ca2.zip |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
There were quite a few overlapping sets of changes here.
Daniel's bug fix for off-by-ones in the new BPF branch instructions,
along with the added allowances for "data_end > ptr + x" forms
collided with the metadata additions.
Along with those three changes came veritifer test cases, which in
their final form I tried to group together properly. If I had just
trimmed GIT's conflict tags as-is, this would have split up the
meta tests unnecessarily.
In the socketmap code, a set of preemption disabling changes
overlapped with the rename of bpf_compute_data_end() to
bpf_compute_data_pointers().
Changes were made to the mv88e6060.c driver set addr method
which got removed in net-next.
The hyperv transport socket layer had a locking change in 'net'
which overlapped with a change of socket state macro usage
in 'net-next'.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/hv/channel_mgmt.c')
-rw-r--r-- | drivers/hv/channel_mgmt.c | 37 |
1 files changed, 18 insertions, 19 deletions
diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c index bcbb031f7263..018d2e0f8ec5 100644 --- a/drivers/hv/channel_mgmt.c +++ b/drivers/hv/channel_mgmt.c @@ -159,7 +159,7 @@ static void vmbus_rescind_cleanup(struct vmbus_channel *channel) spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); - + channel->rescind = true; list_for_each_entry(msginfo, &vmbus_connection.chn_msg_list, msglistentry) { @@ -381,14 +381,21 @@ static void vmbus_release_relid(u32 relid) true); } -void hv_process_channel_removal(struct vmbus_channel *channel, u32 relid) +void hv_process_channel_removal(u32 relid) { unsigned long flags; - struct vmbus_channel *primary_channel; + struct vmbus_channel *primary_channel, *channel; - BUG_ON(!channel->rescind); BUG_ON(!mutex_is_locked(&vmbus_connection.channel_mutex)); + /* + * Make sure channel is valid as we may have raced. + */ + channel = relid2channel(relid); + if (!channel) + return; + + BUG_ON(!channel->rescind); if (channel->target_cpu != get_cpu()) { put_cpu(); smp_call_function_single(channel->target_cpu, @@ -515,6 +522,7 @@ static void vmbus_process_offer(struct vmbus_channel *newchannel) if (!fnew) { if (channel->sc_creation_callback != NULL) channel->sc_creation_callback(newchannel); + newchannel->probe_done = true; return; } @@ -834,7 +842,6 @@ static void vmbus_onoffer_rescind(struct vmbus_channel_message_header *hdr) { struct vmbus_channel_rescind_offer *rescind; struct vmbus_channel *channel; - unsigned long flags; struct device *dev; rescind = (struct vmbus_channel_rescind_offer *)hdr; @@ -873,16 +880,6 @@ static void vmbus_onoffer_rescind(struct vmbus_channel_message_header *hdr) return; } - spin_lock_irqsave(&channel->lock, flags); - channel->rescind = true; - spin_unlock_irqrestore(&channel->lock, flags); - - /* - * Now that we have posted the rescind state, perform - * rescind related cleanup. - */ - vmbus_rescind_cleanup(channel); - /* * Now wait for offer handling to complete. */ @@ -901,6 +898,7 @@ static void vmbus_onoffer_rescind(struct vmbus_channel_message_header *hdr) if (channel->device_obj) { if (channel->chn_rescind_callback) { channel->chn_rescind_callback(channel); + vmbus_rescind_cleanup(channel); return; } /* @@ -909,6 +907,7 @@ static void vmbus_onoffer_rescind(struct vmbus_channel_message_header *hdr) */ dev = get_device(&channel->device_obj->device); if (dev) { + vmbus_rescind_cleanup(channel); vmbus_device_unregister(channel->device_obj); put_device(dev); } @@ -921,16 +920,16 @@ static void vmbus_onoffer_rescind(struct vmbus_channel_message_header *hdr) * 1. Close all sub-channels first * 2. Then close the primary channel. */ + mutex_lock(&vmbus_connection.channel_mutex); + vmbus_rescind_cleanup(channel); if (channel->state == CHANNEL_OPEN_STATE) { /* * The channel is currently not open; * it is safe for us to cleanup the channel. */ - mutex_lock(&vmbus_connection.channel_mutex); - hv_process_channel_removal(channel, - channel->offermsg.child_relid); - mutex_unlock(&vmbus_connection.channel_mutex); + hv_process_channel_removal(rescind->child_relid); } + mutex_unlock(&vmbus_connection.channel_mutex); } } |