linux_dsm_epyc7002/drivers/hv
Dexuan Cui b5679cebf7 vmbus: fix subchannel removal
The changes to split ring allocation from open/close, broke
the cleanup of subchannels. This resulted in problems using
uio on network devices because the subchannel was left behind
when the network device was unbound.

The cause was in the disconnect logic which used list splice
to move the subchannel list into a local variable. This won't
work because the subchannel list is needed later during the
process of the rescind messages (relid2channel).

The fix is to just leave the subchannel list in place
which is what the original code did. The list is cleaned
up later when the host rescind is processed.

Without the fix, we have a lot of "hang" issues in netvsc when we
try to change the NIC's MTU, set the number of channels, etc.

Fixes: ae6935ed7d ("vmbus: split ring buffer allocation from open")
Cc: stable@vger.kernel.org
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-01-09 19:20:31 -05:00
..
channel_mgmt.c Merge 4.20-rc6 into char-misc-next 2018-12-10 09:22:34 +01:00
channel.c vmbus: fix subchannel removal 2019-01-09 19:20:31 -05:00
connection.c Drivers: hv: vmbus: Offload the handling of channels to two workqueues 2018-12-03 08:01:01 +01:00
hv_balloon.c hv_balloon: avoid touching uninitialized struct page during tail onlining 2019-01-09 14:20:47 -05:00
hv_fcopy.c Drivers: hv: fcopy: restore correct transfer length 2017-09-22 10:29:54 +02:00
hv_kvp.c Merge 4.20-rc4 into char-misc-next 2018-11-26 07:50:56 +01:00
hv_snapshot.c
hv_trace_balloon.h hv_balloon: trace post_status 2018-03-06 09:57:17 -08:00
hv_trace.c hv: add SPDX license to trace 2018-03-28 13:24:56 +02:00
hv_trace.h hv: add SPDX license to trace 2018-03-28 13:24:56 +02:00
hv_util.c hv_utils: update name in struct hv_driver util_drv 2018-11-11 12:58:26 -08:00
hv_utils_transport.c vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
hv_utils_transport.h
hv.c Char/Misc driver patches for 4.21-rc1 2018-12-28 20:54:57 -08:00
hyperv_vmbus.h Char/Misc driver patches for 4.21-rc1 2018-12-28 20:54:57 -08:00
Kconfig x86, hyperv: remove PCI dependency 2018-12-13 14:55:57 -05:00
Makefile hv_balloon: trace post_status 2018-03-06 09:57:17 -08:00
ring_buffer.c Drivers: hv: vmbus: Check for ring when getting debug info 2019-01-09 14:20:47 -05:00
vmbus_drv.c Drivers: hv: vmbus: Check for ring when getting debug info 2019-01-09 14:20:47 -05:00