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Dexuan Cui 89f9f6796d hv: vmbus_post_msg: retry the hypercall on some transient errors 
I got HV_STATUS_INVALID_CONNECTION_ID on Hyper-V 2008 R2 when keeping running
"rmmod hv_netvsc; modprobe hv_netvsc; rmmod hv_utils; modprobe hv_utils"
in a Linux guest. Looks the host has some kind of throttling mechanism if
some kinds of hypercalls are sent too frequently.
Without the patch, the driver can occasionally fail to load.

Also let's retry HV_STATUS_INSUFFICIENT_MEMORY, though we didn't get it
before.

Removed 'case -ENOMEM', since the hypervisor doesn't return this.

CC: "K. Y. Srinivasan" <kys@microsoft.com>
Reviewed-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-03-01 19:30:07 -08:00
..
channel.c Drivers: hv: rename sc_lock to the more generic lock 2015-01-25 09:18:00 -08:00
channel_mgmt.c Drivers: hv: vmbus: avoid double kfree for device_obj 2015-03-01 19:29:05 -08:00
connection.c hv: vmbus_post_msg: retry the hypercall on some transient errors 2015-03-01 19:30:07 -08:00
hv.c Drivers: hv: vmbus: Teardown clockevent devices on module unload 2015-03-01 19:30:07 -08:00
hv_balloon.c Drivers: hv: hv_balloon: Don't post pressure status from interrupt context 2015-01-25 09:17:57 -08:00
hv_fcopy.c hv: hv_fcopy: drop the obsolete message on transfer failure 2015-01-25 09:17:58 -08:00
hv_kvp.c Drivers: hv: kvp,vss: Fast propagation of userspace communication failure 2014-11-26 19:00:32 -08:00
hv_snapshot.c Drivers: hv: kvp,vss: Fast propagation of userspace communication failure 2014-11-26 19:00:32 -08:00
hv_util.c hv: hv_util: move vmbus_open() to a later place 2015-03-01 19:30:07 -08:00
hyperv_vmbus.h Drivers: hv: vmbus: Teardown clockevent devices on module unload 2015-03-01 19:30:07 -08:00
Kconfig x86: Make Linux guest support optional 2013-03-04 13:14:25 -08:00
Makefile Drivers: hv: Implement the file copy service 2014-02-18 10:53:48 -08:00
ring_buffer.c Drivers: hv: vmbus: Enable interrupt driven flow control 2014-09-23 23:31:22 -07:00
vmbus_drv.c Drivers: hv: vmbus: Teardown clockevent devices on module unload 2015-03-01 19:30:07 -08:00