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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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06e305f1e3
We have already defined macro's for SVC's major/minor numbers, lets use them. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
243 lines
5.7 KiB
C
243 lines
5.7 KiB
C
/*
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* SVC Greybus driver.
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*
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* Copyright 2015 Google Inc.
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* Copyright 2015 Linaro Ltd.
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*
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* Released under the GPLv2 only.
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*/
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#include "greybus.h"
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struct gb_svc {
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struct gb_connection *connection;
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u8 version_major;
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u8 version_minor;
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};
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/* Define get_version() routine */
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define_get_version(gb_svc, SVC);
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static int intf_device_id_operation(struct gb_svc *svc,
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u8 intf_id, u8 device_id)
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{
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struct gb_svc_intf_device_id_request request;
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request.intf_id = intf_id;
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request.device_id = device_id;
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return gb_operation_sync(svc->connection, GB_SVC_TYPE_INTF_DEVICE_ID,
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&request, sizeof(request), NULL, 0);
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}
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static int intf_reset_operation(struct gb_svc *svc, u8 intf_id)
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{
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struct gb_svc_intf_reset_request request;
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request.intf_id = intf_id;
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return gb_operation_sync(svc->connection, GB_SVC_TYPE_INTF_RESET,
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&request, sizeof(request), NULL, 0);
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}
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static int connection_create_operation(struct gb_svc *svc,
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u8 intf1_id, u16 cport1_id,
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u8 intf2_id, u16 cport2_id)
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{
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struct gb_svc_conn_create_request request;
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request.intf1_id = intf1_id;
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request.cport1_id = cport1_id;
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request.intf2_id = intf2_id;
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request.cport2_id = cport2_id;
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return gb_operation_sync(svc->connection, GB_SVC_TYPE_CONN_CREATE,
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&request, sizeof(request), NULL, 0);
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}
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static int connection_destroy_operation(struct gb_svc *svc,
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u8 intf1_id, u16 cport1_id,
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u8 intf2_id, u16 cport2_id)
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{
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struct gb_svc_conn_destroy_request request;
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request.intf1_id = intf1_id;
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request.cport1_id = cport1_id;
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request.intf2_id = intf2_id;
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request.cport2_id = cport2_id;
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return gb_operation_sync(svc->connection, GB_SVC_TYPE_CONN_DESTROY,
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&request, sizeof(request), NULL, 0);
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}
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int gb_svc_intf_device_id(struct gb_svc *svc, u8 intf_id, u8 device_id)
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{
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return intf_device_id_operation(svc, intf_id, device_id);
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}
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EXPORT_SYMBOL_GPL(gb_svc_intf_device_id);
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int gb_svc_intf_reset(struct gb_svc *svc, u8 intf_id)
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{
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return intf_reset_operation(svc, intf_id);
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}
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EXPORT_SYMBOL_GPL(gb_svc_intf_reset);
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int gb_svc_connection_create(struct gb_svc *svc,
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u8 intf1_id, u16 cport1_id,
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u8 intf2_id, u16 cport2_id)
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{
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return connection_create_operation(svc, intf1_id, cport1_id,
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intf2_id, cport2_id);
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}
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EXPORT_SYMBOL_GPL(gb_svc_connection_create);
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int gb_svc_connection_destroy(struct gb_svc *svc,
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u8 intf1_id, u16 cport1_id,
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u8 intf2_id, u16 cport2_id)
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{
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return connection_destroy_operation(svc, intf1_id, cport1_id,
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intf2_id, cport2_id);
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}
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EXPORT_SYMBOL_GPL(gb_svc_connection_destroy);
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static int gb_svc_intf_hotplug_recv(struct gb_operation *op)
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{
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struct gb_message *request = op->request;
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struct gb_svc_intf_hotplug_request *hotplug;
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u8 intf_id;
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u32 unipro_mfg_id;
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u32 unipro_prod_id;
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u32 ara_vend_id;
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u32 ara_prod_id;
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if (request->payload_size < sizeof(*hotplug)) {
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dev_err(&op->connection->dev,
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"short hotplug request received\n");
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return -EINVAL;
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}
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hotplug = request->payload;
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/*
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* Grab the information we need.
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*
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* XXX I'd really like to acknowledge receipt, and then
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* XXX continue processing the request. There's no need
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* XXX for the SVC to wait. In fact, it might be best to
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* XXX have the SVC get acknowledgement before we proceed.
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*/
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intf_id = hotplug->intf_id;
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unipro_mfg_id = le32_to_cpu(hotplug->data.unipro_mfg_id);
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unipro_prod_id = le32_to_cpu(hotplug->data.unipro_prod_id);
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ara_vend_id = le32_to_cpu(hotplug->data.ara_vend_id);
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ara_prod_id = le32_to_cpu(hotplug->data.ara_prod_id);
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/* FIXME Set up the interface here; may required firmware download */
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return 0;
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}
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static int gb_svc_intf_hot_unplug_recv(struct gb_operation *op)
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{
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struct gb_message *request = op->request;
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struct gb_svc_intf_hot_unplug_request *hot_unplug;
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u8 intf_id;
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if (request->payload_size < sizeof(*hot_unplug)) {
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dev_err(&op->connection->dev,
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"short hot unplug request received\n");
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return -EINVAL;
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}
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hot_unplug = request->payload;
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intf_id = hot_unplug->intf_id;
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/* FIXME Tear down the interface here */
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return 0;
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}
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static int gb_svc_intf_reset_recv(struct gb_operation *op)
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{
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struct gb_message *request = op->request;
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struct gb_svc_intf_reset_request *reset;
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u8 intf_id;
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if (request->payload_size < sizeof(*reset)) {
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dev_err(&op->connection->dev,
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"short reset request received\n");
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return -EINVAL;
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}
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reset = request->payload;
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intf_id = reset->intf_id;
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/* FIXME Reset the interface here */
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return 0;
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}
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static int gb_svc_request_recv(u8 type, struct gb_operation *op)
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{
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switch (type) {
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case GB_SVC_TYPE_INTF_HOTPLUG:
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return gb_svc_intf_hotplug_recv(op);
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case GB_SVC_TYPE_INTF_HOT_UNPLUG:
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return gb_svc_intf_hot_unplug_recv(op);
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case GB_SVC_TYPE_INTF_RESET:
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return gb_svc_intf_reset_recv(op);
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default:
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dev_err(&op->connection->dev,
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"unsupported request: %hhu\n", type);
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return -EINVAL;
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}
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}
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/*
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* Do initial setup of the SVC.
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*/
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static int gb_svc_device_setup(struct gb_svc *gb_svc)
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{
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/* First thing we need to do is check the version */
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return get_version(gb_svc);
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}
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static int gb_svc_connection_init(struct gb_connection *connection)
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{
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struct gb_svc *svc;
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int ret;
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svc = kzalloc(sizeof(*svc), GFP_KERNEL);
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if (!svc)
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return -ENOMEM;
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svc->connection = connection;
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connection->private = svc;
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ret = gb_svc_device_setup(svc);
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if (ret)
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kfree(svc);
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return ret;
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}
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static void gb_svc_connection_exit(struct gb_connection *connection)
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{
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struct gb_svc *svc = connection->private;
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if (!svc)
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return;
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kfree(svc);
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}
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static struct gb_protocol svc_protocol = {
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.name = "svc",
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.id = GREYBUS_PROTOCOL_SVC,
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.major = GB_SVC_VERSION_MAJOR,
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.minor = GB_SVC_VERSION_MINOR,
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.connection_init = gb_svc_connection_init,
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.connection_exit = gb_svc_connection_exit,
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.request_recv = gb_svc_request_recv,
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};
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gb_protocol_driver(&svc_protocol);
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