![Alison Schofield](/assets/img/avatar_default.png)
Use if (status) in tests for successful urb status. This replaces (status != 0) and (status == STATUS_SUCCESS). (STATUS_SUCCESS is defined for NDIS status in this driver, but was being misused) Signed-off-by: Alison Schofield <amsfield22@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
294 lines
6.5 KiB
C
294 lines
6.5 KiB
C
/*
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* Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*
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* File: usbpipe.c
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*
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* Purpose: Handle USB control endpoint
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*
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* Author: Warren Hsu
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*
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* Date: Mar. 29, 2005
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*
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* Functions:
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* vnt_control_out - Write variable length bytes to MEM/BB/MAC/EEPROM
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* vnt_control_in - Read variable length bytes from MEM/BB/MAC/EEPROM
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* vnt_control_out_u8 - Write one byte to MEM/BB/MAC/EEPROM
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* vnt_control_in_u8 - Read one byte from MEM/BB/MAC/EEPROM
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*
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* Revision History:
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* 04-05-2004 Jerry Chen: Initial release
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* 11-24-2004 Warren Hsu: Add ControlvWriteByte,ControlvReadByte,ControlvMaskByte
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*
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*/
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#include "int.h"
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#include "rxtx.h"
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#include "dpc.h"
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#include "desc.h"
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#include "device.h"
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#include "usbpipe.h"
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#define USB_CTL_WAIT 500 /* ms */
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int vnt_control_out(struct vnt_private *priv, u8 request, u16 value,
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u16 index, u16 length, u8 *buffer)
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{
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int status = 0;
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if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags))
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return STATUS_FAILURE;
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mutex_lock(&priv->usb_lock);
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status = usb_control_msg(priv->usb,
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usb_sndctrlpipe(priv->usb, 0), request, 0x40, value,
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index, buffer, length, USB_CTL_WAIT);
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mutex_unlock(&priv->usb_lock);
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if (status < (int)length)
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return STATUS_FAILURE;
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return STATUS_SUCCESS;
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}
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void vnt_control_out_u8(struct vnt_private *priv, u8 reg, u8 reg_off, u8 data)
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{
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vnt_control_out(priv, MESSAGE_TYPE_WRITE,
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reg_off, reg, sizeof(u8), &data);
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}
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int vnt_control_in(struct vnt_private *priv, u8 request, u16 value,
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u16 index, u16 length, u8 *buffer)
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{
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int status;
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if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags))
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return STATUS_FAILURE;
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mutex_lock(&priv->usb_lock);
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status = usb_control_msg(priv->usb,
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usb_rcvctrlpipe(priv->usb, 0), request, 0xc0, value,
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index, buffer, length, USB_CTL_WAIT);
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mutex_unlock(&priv->usb_lock);
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if (status < (int)length)
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return STATUS_FAILURE;
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return STATUS_SUCCESS;
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}
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void vnt_control_in_u8(struct vnt_private *priv, u8 reg, u8 reg_off, u8 *data)
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{
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vnt_control_in(priv, MESSAGE_TYPE_READ,
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reg_off, reg, sizeof(u8), data);
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}
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static void vnt_start_interrupt_urb_complete(struct urb *urb)
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{
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struct vnt_private *priv = urb->context;
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int status = urb->status;
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switch (status) {
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case 0:
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case -ETIMEDOUT:
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break;
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case -ECONNRESET:
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case -ENOENT:
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case -ESHUTDOWN:
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priv->int_buf.in_use = false;
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return;
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default:
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break;
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}
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if (status) {
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priv->int_buf.in_use = false;
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dev_dbg(&priv->usb->dev, "%s status = %d\n", __func__, status);
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} else {
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vnt_int_process_data(priv);
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}
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status = usb_submit_urb(priv->interrupt_urb, GFP_ATOMIC);
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if (status)
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dev_dbg(&priv->usb->dev, "Submit int URB failed %d\n", status);
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else
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priv->int_buf.in_use = true;
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}
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int vnt_start_interrupt_urb(struct vnt_private *priv)
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{
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int status = STATUS_FAILURE;
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if (priv->int_buf.in_use)
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return STATUS_FAILURE;
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priv->int_buf.in_use = true;
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usb_fill_int_urb(priv->interrupt_urb,
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priv->usb,
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usb_rcvintpipe(priv->usb, 1),
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priv->int_buf.data_buf,
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MAX_INTERRUPT_SIZE,
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vnt_start_interrupt_urb_complete,
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priv,
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priv->int_interval);
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status = usb_submit_urb(priv->interrupt_urb, GFP_ATOMIC);
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if (status) {
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dev_dbg(&priv->usb->dev, "Submit int URB failed %d\n", status);
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priv->int_buf.in_use = false;
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}
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return status;
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}
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static void vnt_submit_rx_urb_complete(struct urb *urb)
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{
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struct vnt_rcb *rcb = urb->context;
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struct vnt_private *priv = rcb->priv;
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switch (urb->status) {
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case 0:
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break;
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case -ECONNRESET:
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case -ENOENT:
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case -ESHUTDOWN:
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return;
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case -ETIMEDOUT:
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default:
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dev_dbg(&priv->usb->dev, "BULK In failed %d\n", urb->status);
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break;
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}
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if (urb->actual_length) {
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if (vnt_rx_data(priv, rcb, urb->actual_length)) {
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rcb->skb = dev_alloc_skb(priv->rx_buf_sz);
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if (!rcb->skb) {
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dev_dbg(&priv->usb->dev,
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"Failed to re-alloc rx skb\n");
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rcb->in_use = false;
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return;
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}
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} else {
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skb_push(rcb->skb, skb_headroom(rcb->skb));
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skb_trim(rcb->skb, 0);
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}
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urb->transfer_buffer = skb_put(rcb->skb,
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skb_tailroom(rcb->skb));
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}
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if (usb_submit_urb(urb, GFP_ATOMIC)) {
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dev_dbg(&priv->usb->dev, "Failed to re submit rx skb\n");
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rcb->in_use = false;
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}
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}
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int vnt_submit_rx_urb(struct vnt_private *priv, struct vnt_rcb *rcb)
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{
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int status = 0;
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struct urb *urb = rcb->urb;
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if (!rcb->skb) {
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dev_dbg(&priv->usb->dev, "rcb->skb is null\n");
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return status;
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}
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usb_fill_bulk_urb(urb,
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priv->usb,
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usb_rcvbulkpipe(priv->usb, 2),
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skb_put(rcb->skb, skb_tailroom(rcb->skb)),
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MAX_TOTAL_SIZE_WITH_ALL_HEADERS,
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vnt_submit_rx_urb_complete,
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rcb);
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status = usb_submit_urb(urb, GFP_ATOMIC);
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if (status) {
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dev_dbg(&priv->usb->dev, "Submit Rx URB failed %d\n", status);
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return STATUS_FAILURE;
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}
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rcb->in_use = true;
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return status;
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}
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static void vnt_tx_context_complete(struct urb *urb)
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{
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struct vnt_usb_send_context *context = urb->context;
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struct vnt_private *priv = context->priv;
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switch (urb->status) {
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case 0:
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dev_dbg(&priv->usb->dev, "Write %d bytes\n", context->buf_len);
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break;
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case -ECONNRESET:
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case -ENOENT:
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case -ESHUTDOWN:
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context->in_use = false;
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return;
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case -ETIMEDOUT:
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default:
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dev_dbg(&priv->usb->dev, "BULK Out failed %d\n", urb->status);
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break;
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}
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if (context->type == CONTEXT_DATA_PACKET)
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ieee80211_wake_queues(priv->hw);
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if (urb->status || context->type == CONTEXT_BEACON_PACKET) {
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if (context->skb)
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ieee80211_free_txskb(priv->hw, context->skb);
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context->in_use = false;
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}
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}
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int vnt_tx_context(struct vnt_private *priv,
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struct vnt_usb_send_context *context)
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{
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int status;
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struct urb *urb = context->urb;
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if (test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags)) {
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context->in_use = false;
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return STATUS_RESOURCES;
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}
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usb_fill_bulk_urb(urb,
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priv->usb,
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usb_sndbulkpipe(priv->usb, 3),
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context->data,
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context->buf_len,
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vnt_tx_context_complete,
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context);
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status = usb_submit_urb(urb, GFP_ATOMIC);
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if (status) {
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dev_dbg(&priv->usb->dev, "Submit Tx URB failed %d\n", status);
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context->in_use = false;
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return STATUS_FAILURE;
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}
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return STATUS_PENDING;
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}
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