Commit ca1f8f80 authored by Johan Hovold's avatar Johan Hovold Committed by Greg Kroah-Hartman
Browse files

greybus: connection: add offloaded connection flag 



Add an offloaded connection flag, which is used to mark a connection as
offloaded and prevent drivers from initiating operation over it.

This will be used for the audio and camera data connections.

Signed-off-by: default avatarJohan Hovold <johan@hovoldconsulting.com>
Reviewed-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@google.com>
parent 0e9b41ab

drivers/staging/greybus/connection.h

+6 −0
Original line number Diff line number Diff line
@@ -15,6 +15,7 @@ 


#define GB_CONNECTION_FLAG_CSD		BIT(0)

#define GB_CONNECTION_FLAG_NO_FLOWCTRL	BIT(1)

#define GB_CONNECTION_FLAG_OFFLOADED	BIT(2)



enum gb_connection_state {

	GB_CONNECTION_STATE_INVALID	= 0,
@@ -95,6 +96,11 @@ gb_connection_flow_control_disabled(struct gb_connection *connection) 
	return connection->flags & GB_CONNECTION_FLAG_NO_FLOWCTRL;

}



static inline bool gb_connection_is_offloaded(struct gb_connection *connection)

{

	return connection->flags & GB_CONNECTION_FLAG_OFFLOADED;

}



static inline void *gb_connection_get_data(struct gb_connection *connection)

{

	return connection->private;

drivers/staging/greybus/operation.c

+6 −2
Original line number Diff line number Diff line
@@ -654,6 +654,9 @@ int gb_operation_request_send(struct gb_operation *operation, 
	unsigned int cycle;

	int ret;



	if (gb_connection_is_offloaded(connection))

		return -EBUSY;



	if (!callback)

		return -EINVAL;
@@ -950,8 +953,9 @@ void gb_connection_recv(struct gb_connection *connection, 
	size_t msg_size;

	u16 operation_id;



	if (connection->state != GB_CONNECTION_STATE_ENABLED &&

		connection->state != GB_CONNECTION_STATE_ENABLED_TX) {

	if ((connection->state != GB_CONNECTION_STATE_ENABLED &&

			connection->state != GB_CONNECTION_STATE_ENABLED_TX) ||

			gb_connection_is_offloaded(connection)) {

		dev_warn(dev, "%s: dropping %zu received bytes\n",

				connection->name, size);

		return;