staging/mei: propagate error codes up in the write flow
Change mei_write_message's return type from bool to int to enable propagation of the error code up to caller functions. The function now returns -EIO when low level write fails and 0 on success. A similar change is done in intermediate caller functions: mei_send_flow_control, mei_connect, and mei_disconnect This makes code more alike to typical Linux kernel error handling. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tomas Winkler
Greg Kroah-Hartman
Родитель
5f9092f36f
Коммит
1ccb7b6249
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@ -366,7 +366,7 @@ void mei_host_start_message(struct mei_device *dev)
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host_start_req->host_version.major_version = HBM_MAJOR_VERSION;
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host_start_req->host_version.minor_version = HBM_MINOR_VERSION;
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dev->recvd_msg = false;
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if (!mei_write_message(dev, mei_hdr, (unsigned char *)host_start_req,
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if (mei_write_message(dev, mei_hdr, (unsigned char *)host_start_req,
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mei_hdr->length)) {
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dev_dbg(&dev->pdev->dev, "write send version message to FW fail.\n");
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dev->mei_state = MEI_RESETING;
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@ -399,7 +399,7 @@ void mei_host_enum_clients_message(struct mei_device *dev)
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host_enum_req = (struct hbm_host_enum_request *) &dev->wr_msg_buf[1];
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memset(host_enum_req, 0, sizeof(struct hbm_host_enum_request));
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host_enum_req->hbm_cmd = HOST_ENUM_REQ_CMD;
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if (!mei_write_message(dev, mei_hdr, (unsigned char *)host_enum_req,
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if (mei_write_message(dev, mei_hdr, (unsigned char *)host_enum_req,
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mei_hdr->length)) {
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dev->mei_state = MEI_RESETING;
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dev_dbg(&dev->pdev->dev, "write send enumeration request message to FW fail.\n");
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@ -407,7 +407,7 @@ void mei_host_enum_clients_message(struct mei_device *dev)
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}
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dev->init_clients_state = MEI_ENUM_CLIENTS_MESSAGE;
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dev->init_clients_timer = INIT_CLIENTS_TIMEOUT;
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return ;
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return;
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}
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@ -485,7 +485,7 @@ int mei_host_client_properties(struct mei_device *dev)
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host_cli_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD;
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host_cli_req->address = b;
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if (!mei_write_message(dev, mei_header,
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if (mei_write_message(dev, mei_header,
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(unsigned char *)host_cli_req,
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mei_header->length)) {
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dev->mei_state = MEI_RESETING;
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@ -608,7 +608,7 @@ void mei_host_init_iamthif(struct mei_device *dev)
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dev->iamthif_msg_buf = msg_buf;
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if (!mei_connect(dev, &dev->iamthif_cl)) {
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if (mei_connect(dev, &dev->iamthif_cl)) {
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dev_dbg(&dev->pdev->dev, "Failed to connect to AMTHI client\n");
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dev->iamthif_cl.state = MEI_FILE_DISCONNECTED;
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dev->iamthif_cl.host_client_id = 0;
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@ -670,14 +670,12 @@ int mei_disconnect_host_client(struct mei_device *dev, struct mei_cl *cl)
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if (dev->mei_host_buffer_is_empty) {
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dev->mei_host_buffer_is_empty = false;
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if (mei_disconnect(dev, cl)) {
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mdelay(10); /* Wait for hardware disconnection ready */
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list_add_tail(&cb->cb_list,
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&dev->ctrl_rd_list.mei_cb.cb_list);
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} else {
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rets = -ENODEV;
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dev_dbg(&dev->pdev->dev, "failed to call mei_disconnect.\n");
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goto free;
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}
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mdelay(10); /* Wait for hardware disconnection ready */
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list_add_tail(&cb->cb_list, &dev->ctrl_rd_list.mei_cb.cb_list);
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} else {
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dev_dbg(&dev->pdev->dev, "add disconnect cb to control write list\n");
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list_add_tail(&cb->cb_list,
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@ -125,7 +125,7 @@ int mei_count_empty_write_slots(struct mei_device *dev)
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* @write_buffer: message buffer will be written
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* @write_length: message size will be written
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*
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* returns 1 if success, 0 - otherwise.
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* This function returns -EIO if write has failed
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*/
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int mei_write_message(struct mei_device *dev,
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struct mei_msg_hdr *header,
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@ -157,7 +157,7 @@ int mei_write_message(struct mei_device *dev,
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dw_to_write = ((write_length + 3) / 4);
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if (dw_to_write > empty_slots)
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return 0;
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return -EIO;
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mei_reg_write(dev, H_CB_WW, *((u32 *) header));
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@ -177,9 +177,9 @@ int mei_write_message(struct mei_device *dev,
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mei_hcsr_set(dev);
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dev->me_hw_state = mei_mecsr_read(dev);
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if ((dev->me_hw_state & ME_RDY_HRA) != ME_RDY_HRA)
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return 0;
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return -EIO;
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return 1;
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return 0;
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}
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/**
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@ -308,7 +308,7 @@ int mei_flow_ctrl_reduce(struct mei_device *dev, struct mei_cl *cl)
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* @dev: the device structure
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* @cl: private data of the file object
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*
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* returns 1 if success, 0 - otherwise.
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* This function returns -EIO on write failure
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*/
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int mei_send_flow_control(struct mei_device *dev, struct mei_cl *cl)
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{
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@ -331,13 +331,10 @@ int mei_send_flow_control(struct mei_device *dev, struct mei_cl *cl)
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sizeof(mei_flow_control->reserved));
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dev_dbg(&dev->pdev->dev, "sending flow control host client = %d, ME client = %d\n",
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cl->host_client_id, cl->me_client_id);
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if (!mei_write_message(dev, mei_hdr,
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return mei_write_message(dev, mei_hdr,
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(unsigned char *) mei_flow_control,
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sizeof(struct hbm_flow_control)))
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return 0;
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return 1;
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sizeof(struct hbm_flow_control));
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}
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/**
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@ -371,7 +368,7 @@ int mei_other_client_is_connecting(struct mei_device *dev,
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* @dev: the device structure
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* @cl: private data of the file object
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*
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* returns 1 if success, 0 - otherwise.
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* This function returns -EIO on write failure
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*/
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int mei_disconnect(struct mei_device *dev, struct mei_cl *cl)
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{
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@ -393,12 +390,9 @@ int mei_disconnect(struct mei_device *dev, struct mei_cl *cl)
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mei_cli_disconnect->hbm_cmd = CLIENT_DISCONNECT_REQ_CMD;
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mei_cli_disconnect->reserved[0] = 0;
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if (!mei_write_message(dev, mei_hdr,
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return mei_write_message(dev, mei_hdr,
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(unsigned char *) mei_cli_disconnect,
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sizeof(struct hbm_client_disconnect_request)))
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return 0;
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return 1;
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sizeof(struct hbm_client_disconnect_request));
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}
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/**
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@ -407,7 +401,7 @@ int mei_disconnect(struct mei_device *dev, struct mei_cl *cl)
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* @dev: the device structure
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* @cl: private data of the file object
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*
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* returns 1 if success, 0 - otherwise.
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* This function returns -EIO on write failure
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*/
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int mei_connect(struct mei_device *dev, struct mei_cl *cl)
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{
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@ -428,10 +422,7 @@ int mei_connect(struct mei_device *dev, struct mei_cl *cl)
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mei_cli_connect->hbm_cmd = CLIENT_CONNECT_REQ_CMD;
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mei_cli_connect->reserved = 0;
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if (!mei_write_message(dev, mei_hdr,
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return mei_write_message(dev, mei_hdr,
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(unsigned char *) mei_cli_connect,
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sizeof(struct hbm_client_connect_request)))
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return 0;
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return 1;
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sizeof(struct hbm_client_connect_request));
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}
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@ -263,26 +263,25 @@ quit:
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static int _mei_irq_thread_iamthif_read(struct mei_device *dev, s32 *slots)
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{
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if (((*slots) * sizeof(u32)) >= (sizeof(struct mei_msg_hdr)
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if (((*slots) * sizeof(u32)) < (sizeof(struct mei_msg_hdr)
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+ sizeof(struct hbm_flow_control))) {
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return -EMSGSIZE;
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}
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*slots -= (sizeof(struct mei_msg_hdr) +
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sizeof(struct hbm_flow_control) + 3) / 4;
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if (!mei_send_flow_control(dev, &dev->iamthif_cl)) {
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if (mei_send_flow_control(dev, &dev->iamthif_cl)) {
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dev_dbg(&dev->pdev->dev, "iamthif flow control failed\n");
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} else {
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return -EIO;
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}
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dev_dbg(&dev->pdev->dev, "iamthif flow control success\n");
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dev->iamthif_state = MEI_IAMTHIF_READING;
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dev->iamthif_flow_control_pending = false;
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dev->iamthif_msg_buf_index = 0;
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dev->iamthif_msg_buf_size = 0;
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dev->iamthif_stall_timer = IAMTHIF_STALL_TIMER;
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dev->mei_host_buffer_is_empty =
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mei_host_buffer_is_empty(dev);
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}
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dev->mei_host_buffer_is_empty = mei_host_buffer_is_empty(dev);
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return 0;
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} else {
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return -EMSGSIZE;
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}
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}
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/**
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@ -306,7 +305,7 @@ static int _mei_irq_thread_close(struct mei_device *dev, s32 *slots,
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*slots -= (sizeof(struct mei_msg_hdr) +
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sizeof(struct hbm_client_disconnect_request) + 3) / 4;
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if (!mei_disconnect(dev, cl)) {
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if (mei_disconnect(dev, cl)) {
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cl->status = 0;
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cb_pos->information = 0;
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list_move_tail(&cb_pos->cb_list,
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@ -838,24 +837,21 @@ static int _mei_irq_thread_read(struct mei_device *dev, s32 *slots,
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{
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if ((*slots * sizeof(u32)) >= (sizeof(struct mei_msg_hdr) +
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sizeof(struct hbm_flow_control))) {
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*slots -= (sizeof(struct mei_msg_hdr) +
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sizeof(struct hbm_flow_control) + 3) / 4;
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if (!mei_send_flow_control(dev, cl)) {
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cl->status = -ENODEV;
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cb_pos->information = 0;
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list_move_tail(&cb_pos->cb_list,
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&cmpl_list->mei_cb.cb_list);
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return -ENODEV;
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} else {
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list_move_tail(&cb_pos->cb_list,
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&dev->read_list.mei_cb.cb_list);
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}
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} else {
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/* return the cancel routine */
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list_del(&cb_pos->cb_list);
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return -EBADMSG;
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}
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*slots -= (sizeof(struct mei_msg_hdr) +
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sizeof(struct hbm_flow_control) + 3) / 4;
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if (mei_send_flow_control(dev, cl)) {
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cl->status = -ENODEV;
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cb_pos->information = 0;
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list_move_tail(&cb_pos->cb_list, &cmpl_list->mei_cb.cb_list);
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return -ENODEV;
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}
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list_move_tail(&cb_pos->cb_list, &dev->read_list.mei_cb.cb_list);
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return 0;
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}
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@ -881,7 +877,7 @@ static int _mei_irq_thread_ioctl(struct mei_device *dev, s32 *slots,
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cl->state = MEI_FILE_CONNECTING;
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*slots -= (sizeof(struct mei_msg_hdr) +
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sizeof(struct hbm_client_connect_request) + 3) / 4;
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if (!mei_connect(dev, cl)) {
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if (mei_connect(dev, cl)) {
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cl->status = -ENODEV;
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cb_pos->information = 0;
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list_del(&cb_pos->cb_list);
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@ -938,7 +934,7 @@ static int _mei_irq_thread_cmpl(struct mei_device *dev, s32 *slots,
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mei_hdr->length);
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*slots -= (sizeof(struct mei_msg_hdr) +
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mei_hdr->length + 3) / 4;
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if (!mei_write_message(dev, mei_hdr,
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if (mei_write_message(dev, mei_hdr,
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(unsigned char *)
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(cb_pos->request_buffer.data +
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cb_pos->information),
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@ -967,7 +963,7 @@ static int _mei_irq_thread_cmpl(struct mei_device *dev, s32 *slots,
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(*slots) -= (sizeof(struct mei_msg_hdr) +
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mei_hdr->length + 3) / 4;
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if (!mei_write_message(dev, mei_hdr,
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if (mei_write_message(dev, mei_hdr,
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(unsigned char *)
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(cb_pos->request_buffer.data +
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cb_pos->information),
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@ -1028,7 +1024,7 @@ static int _mei_irq_thread_cmpl_iamthif(struct mei_device *dev, s32 *slots,
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*slots -= (sizeof(struct mei_msg_hdr) +
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mei_hdr->length + 3) / 4;
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if (!mei_write_message(dev, mei_hdr,
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if (mei_write_message(dev, mei_hdr,
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(dev->iamthif_msg_buf +
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dev->iamthif_msg_buf_index),
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mei_hdr->length)) {
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@ -1063,7 +1059,7 @@ static int _mei_irq_thread_cmpl_iamthif(struct mei_device *dev, s32 *slots,
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*slots -= (sizeof(struct mei_msg_hdr) +
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mei_hdr->length + 3) / 4;
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if (!mei_write_message(dev, mei_hdr,
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if (mei_write_message(dev, mei_hdr,
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(dev->iamthif_msg_buf +
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dev->iamthif_msg_buf_index),
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mei_hdr->length)) {
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@ -162,7 +162,7 @@ int mei_ioctl_connect_client(struct file *file,
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&& !mei_other_client_is_connecting(dev, cl)) {
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dev_dbg(&dev->pdev->dev, "Sending Connect Message\n");
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dev->mei_host_buffer_is_empty = false;
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if (!mei_connect(dev, cl)) {
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if (mei_connect(dev, cl)) {
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dev_dbg(&dev->pdev->dev, "Sending connect message - failed\n");
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rets = -ENODEV;
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goto end;
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@ -434,13 +434,11 @@ int mei_start_read(struct mei_device *dev, struct mei_cl *cl)
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cl->read_cb = cb;
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if (dev->mei_host_buffer_is_empty) {
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dev->mei_host_buffer_is_empty = false;
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if (!mei_send_flow_control(dev, cl)) {
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if (mei_send_flow_control(dev, cl)) {
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rets = -ENODEV;
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goto unlock;
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} else {
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list_add_tail(&cb->cb_list,
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&dev->read_list.mei_cb.cb_list);
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}
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list_add_tail(&cb->cb_list, &dev->read_list.mei_cb.cb_list);
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} else {
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list_add_tail(&cb->cb_list, &dev->ctrl_wr_list.mei_cb.cb_list);
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}
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@ -500,7 +498,7 @@ int amthi_write(struct mei_device *dev, struct mei_cl_cb *cb)
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mei_hdr.me_addr = dev->iamthif_cl.me_client_id;
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mei_hdr.reserved = 0;
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dev->iamthif_msg_buf_index += mei_hdr.length;
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if (!mei_write_message(dev, &mei_hdr,
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if (mei_write_message(dev, &mei_hdr,
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(unsigned char *)(dev->iamthif_msg_buf),
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mei_hdr.length))
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return -ENODEV;
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|
|
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@ -740,7 +740,7 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
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mei_hdr.reserved = 0;
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dev_dbg(&dev->pdev->dev, "call mei_write_message header=%08x.\n",
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*((u32 *) &mei_hdr));
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if (!mei_write_message(dev, &mei_hdr,
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if (mei_write_message(dev, &mei_hdr,
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(unsigned char *) (write_cb->request_buffer.data),
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mei_hdr.length)) {
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rets = -ENODEV;
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|
|
|
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@ -74,7 +74,7 @@ bool mei_wd_host_init(struct mei_device *dev)
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dev_dbg(&dev->pdev->dev, "check wd_cl\n");
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if (MEI_FILE_CONNECTING == dev->wd_cl.state) {
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if (!mei_connect(dev, &dev->wd_cl)) {
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if (mei_connect(dev, &dev->wd_cl)) {
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dev_dbg(&dev->pdev->dev, "Failed to connect to WD client\n");
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dev->wd_cl.state = MEI_FILE_DISCONNECTED;
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dev->wd_cl.host_client_id = 0;
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@ -119,9 +119,7 @@ int mei_wd_send(struct mei_device *dev)
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else
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return -EINVAL;
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if (mei_write_message(dev, mei_hdr, dev->wd_data, mei_hdr->length))
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return 0;
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return -EIO;
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return mei_write_message(dev, mei_hdr, dev->wd_data, mei_hdr->length);
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}
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/**
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|
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