Vineeth Pillai b3f5d4e767 hv_utils: drain the timesync packets on onchannelcallback ... commit b46b4a8a57 upstream. There could be instances where a system stall prevents the timesync packets to be consumed. And this might lead to more than one packet pending in the ring buffer. Current code empties one packet per callback and it might be a stale one. So drain all the packets from ring buffer on each callback. Signed-off-by: Vineeth Pillai <viremana@linux.microsoft.com> Reviewed-by: Michael Kelley <mikelley@microsoft.com> Link: https://lore.kernel.org/r/20200821152849.99517-1-viremana@linux.microsoft.com Signed-off-by: Wei Liu <wei.liu@kernel.org> [ The old code in the upstream commit uses HV_HYP_PAGE_SIZE, but the old code in 5.4.y sitll uses PAGE_SIZE. Fixed this manually for 5.4.y. Note: 5.4.y already has the define HV_HYP_PAGE_SIZE, so the new code in in the upstream commit works for 5.4.y. If there are multiple messages in the host-to-guest ringbuffer of the TimeSync device, 5.4.y only handles 1 message, and later the host puts new messages into the ringbuffer without signaling the guest because the ringbuffer is not empty, causing a "hung" ringbuffer. Backported the mainline fix for this issue.] Signed-off-by: Dexuan Cui <decui@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2024-07-05 09:08:20 +02:00
..
channel_mgmt.c	Drivers: hv: vmbus: Fix vmbus_wait_for_unload() to scan present CPUs	2023-06-28 10:18:36 +02:00
channel.c	Drivers: hv: vmbus: Fix virt_to_hvpfn() for X86_PAE	2019-08-20 12:49:57 -04:00
connection.c	Drivers: hv: vmbus: Always handle the VMBus messages on CPU0	2020-06-22 09:31:00 +02:00
hv_balloon.c	hv_balloon: rate-limit "Unhandled message" warning	2022-04-15 14:18:15 +02:00
hv_fcopy.c
hv_kvp.c
hv_snapshot.c
hv_trace_balloon.h
hv_trace.c
hv_trace.h	tools: hv: Use the correct style for SPDX License Identifier	2019-08-17 15:29:34 -04:00
hv_util.c	hv_utils: drain the timesync packets on onchannelcallback	2024-07-05 09:08:20 +02:00
hv_utils_transport.c
hv_utils_transport.h
hv.c	Drivers: hv: vmbus: Allow cleanup of VMBUS_CONNECT_CPU if disconnected	2020-11-24 13:29:23 +01:00
hyperv_vmbus.h	hyperv/vmbus: include linux/bitops.h	2021-11-17 09:48:20 +01:00
Kconfig	clocksource/drivers/hyperv: Enable TSC page clocksource on 32bit	2019-08-23 16:59:54 +02:00
Makefile
ring_buffer.c	Drivers: hv: vmbus: Prevent load re-ordering when reading ring buffer	2022-04-20 09:19:36 +02:00
vmbus_drv.c	Drivers: hv: vmbus: fix possible memory leak in vmbus_device_register()	2022-12-08 11:22:58 +01:00