linux-toradex.git/drivers/hv/channel.c, branch v4.1.12

Drivers: hv: vmbus: Fix a siganlling host signalling issue

2015-03-25T10:53:55+00:00

Handle the case when the write to the ringbuffer fails. In this case,
unconditionally signal the host. Since we may have deferred signalling
the host based on the kick_q parameter, signalling the host
unconditionally in this case deals with the issue.

Signed-off-by: K. Y. Srinivasan 
Signed-off-by: Greg Kroah-Hartman

Drivers: hv: vmbus: Export the vmbus_sendpacket_pagebuffer_ctl()

2015-03-25T10:53:55+00:00

Export the vmbus_sendpacket_pagebuffer_ctl() interface. This export will be
used by the netvsc driver.

Signed-off-by: K. Y. Srinivasan 
Signed-off-by: Greg Kroah-Hartman

Drivers: hv: vmbus: Fix a bug in rescind processing in vmbus_close_internal()

2015-03-25T10:53:54+00:00

When a channel has been rescinded, the close operation is a noop.
Restructure the code so we deal with the rescind condition after
we properly cleanup the channel. I would like to thank
Dexuan Cui  for observing this problem.
The current code leaks memory when the channel is rescinded.

The current char-next branch is broken and this patch fixes
the bug.

Signed-off-by: K. Y. Srinivasan 
Signed-off-by: Greg Kroah-Hartman

Drivers: hv: vmbus: Suport an API to send packet with additional control

2015-03-02T03:31:47+00:00

Implement an API that gives additional control on the what VMBUS flags will be
set as well as if the host needs to be signalled. This API will be
useful for clients that want to batch up requests to the host.

Signed-off-by: K. Y. Srinivasan 
Signed-off-by: Greg Kroah-Hartman

Drivers: hv: vmbus: Suport an API to send pagebuffers with additional control

2015-03-02T03:31:47+00:00

Implement an API for sending pagebuffers that gives more control to the client
in terms of setting the vmbus flags as well as deciding when to
notify the host. This will be useful for enabling batch processing.

Signed-off-by: K. Y. Srinivasan 
Signed-off-by: Greg Kroah-Hartman

Drivers: hv: vmbus: Introduce a function to remove a rescinded offer

2015-03-02T03:31:02+00:00

In response to a rescind message, we need to remove the channel and the
corresponding device. Cleanup this code path by factoring out the code
to remove a channel.

Signed-off-by: K. Y. Srinivasan 
Signed-off-by: Greg Kroah-Hartman

Drivers: hv: vmbus: Fix a bug in the error path in vmbus_open()

2015-03-02T03:30:08+00:00

Correctly rollback state if the failure occurs after we have handed over
the ownership of the buffer to the host.

Signed-off-by: K. Y. Srinivasan 
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman

hv: channel: match var type to return type of wait_for_completion

2015-03-02T03:30:07+00:00

return type of wait_for_completion_timeout is unsigned long not int, this
patch changes the type of t from int to unsigned long.

Signed-off-by: Nicholas Mc Guire 
Signed-off-by: K. Y. Srinivasan 
Signed-off-by: Greg Kroah-Hartman

hv: vmbus_open(): reset the channel state on ENOMEM

2015-03-02T03:30:07+00:00

Without this patch, the state is put to CHANNEL_OPENING_STATE, and when
the driver is loaded next time, vmbus_open() will fail immediately due to
newchannel->state != CHANNEL_OPEN_STATE.

CC: "K. Y. Srinivasan" 
Signed-off-by: Dexuan Cui 
Reviewed-by: Jason Wang 
Signed-off-by: K. Y. Srinivasan 
Signed-off-by: Greg Kroah-Hartman

Drivers: hv: rename sc_lock to the more generic lock

2015-01-25T17:18:00+00:00

sc_lock spinlock in struct vmbus_channel is being used to not only protect the
sc_list field, e.g. vmbus_open() function uses it to implement test-and-set
access to the state field. Rename it to the more generic 'lock' and add the
description.

Signed-off-by: Vitaly Kuznetsov 
Signed-off-by: K. Y. Srinivasan 
Acked-by: Jason Wang 
Signed-off-by: Greg Kroah-Hartman