Hi Oliver,
Your patch fails in 3 places against 2.6.29-rc1,
The first place being hso_serial_tiocmget.
the spin_lock_irqsave is spin_lock_irq in my kernel sources.
What kernel is this patch supposed to apply against?
Oliver Neukum wrote:
> Am Freitag, 19. Dezember 2008 13:26:34 schrieb Chris Snook:
>> Denis Joseph Barrow wrote:
>>> Get Martin Schwidefsky to look over it.
>>> I hope he needs to write a 3g modem driver for linux on the z series anyway
>>> so he may as well get used to the code.
>> I hope they come out with one soon, so I can get that ultraportable mainframe
>> I've been thinking about.
>
> Hi,
>
> if nobody has tested the last patch, don't bother. Here's a newer version.
>
> Regards
> Oliver
>
> ---
> diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c
> index cc75c8b..52f12fb 100644
> --- a/drivers/net/usb/hso.c
> +++ b/drivers/net/usb/hso.c
> @@ -167,7 +167,6 @@ struct hso_net {
> struct sk_buff *skb_tx_buf;
>
> enum pkt_parse_state rx_parse_state;
> - spinlock_t net_lock;
>
> unsigned short rx_buf_size;
> unsigned short rx_buf_missing;
> @@ -216,7 +215,6 @@ struct hso_serial {
> /* from usb_serial_port */
> struct tty_struct *tty;
> int open_count;
> - spinlock_t serial_lock;
>
> int (*write_data) (struct hso_serial *serial);
> /* Hacks required to get flow control
> @@ -238,10 +236,13 @@ struct hso_device {
>
> u32 port_spec;
>
> - u8 is_active;
> - u8 usb_gone;
> + char is_active:1;
> + char is_suspended:1;
> + char is_elevated:1;
> + char usb_gone:1;
> struct work_struct async_get_intf;
> struct work_struct async_put_intf;
> + spinlock_t lock;
>
> struct usb_device *usb;
> struct usb_interface *interface;
> @@ -642,7 +643,6 @@ static void log_usb_status(int status, const char *function)
> static int hso_net_open(struct net_device *net)
> {
> struct hso_net *odev = netdev_priv(net);
> - unsigned long flags = 0;
>
> if (!odev) {
> dev_err(&net->dev, "No net device !\n");
> @@ -652,11 +652,11 @@ static int hso_net_open(struct net_device *net)
> odev->skb_tx_buf = NULL;
>
> /* setup environment */
> - spin_lock_irqsave(&odev->net_lock, flags);
> + spin_lock_irq(&odev->parent->lock);
> odev->rx_parse_state = WAIT_IP;
> odev->rx_buf_size = 0;
> odev->rx_buf_missing = sizeof(struct iphdr);
> - spin_unlock_irqrestore(&odev->net_lock, flags);
> + spin_unlock_irq(&odev->parent->lock);
>
> /* We are up and running. */
> set_bit(HSO_NET_RUNNING, &odev->flags);
> @@ -708,7 +708,9 @@ static void write_bulk_callback(struct urb *urb)
> if (status)
> log_usb_status(status, __func__);
>
> + spin_lock(&odev->parent->lock);
> hso_put_activity(odev->parent);
> + spin_unlock(&odev->parent->lock);
>
> /* Tell the network interface we are ready for another frame */
> netif_wake_queue(odev->net);
> @@ -718,14 +720,26 @@ static void write_bulk_callback(struct urb *urb)
> static int hso_net_start_xmit(struct sk_buff *skb, struct net_device *net)
> {
> struct hso_net *odev = netdev_priv(net);
> - int result;
> + struct hso_device *pdev = odev->parent;
> + int result = 0;
>
> /* Tell the kernel, "No more frames 'til we are done with this one." */
> netif_stop_queue(net);
> - if (hso_get_activity(odev->parent) == -EAGAIN) {
> - odev->skb_tx_buf = skb;
> - return 0;
> +
> + usb_mark_last_busy(pdev->usb);
> + spin_lock(&pdev->lock);
> + if (!pdev->is_active) {
> + if (!pdev->is_suspended) {
> + pdev->is_active = 1;
> + } else {
> + odev->skb_tx_buf = skb;
> + hso_get_activity(pdev);
> + result = 1;
> + }
> }
> + spin_unlock(&pdev->lock);
> + if (result)
> + return 0;
>
> /* log if asked */
> DUMP1(skb->data, skb->len);
> @@ -735,8 +749,8 @@ static int hso_net_start_xmit(struct sk_buff *skb, struct net_device *net)
>
> /* Fill in the URB for shipping it out. */
> usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
> - odev->parent->usb,
> - usb_sndbulkpipe(odev->parent->usb,
> + pdev->usb,
> + usb_sndbulkpipe(pdev->usb,
> odev->out_endp->
> bEndpointAddress & 0x7F),
> odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
> @@ -748,7 +762,7 @@ static int hso_net_start_xmit(struct sk_buff *skb, struct net_device *net)
> /* Send the URB on its merry way. */
> result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
> if (result) {
> - dev_warn(&odev->parent->interface->dev,
> + dev_warn(&pdev->interface->dev,
> "failed mux_bulk_tx_urb %d", result);
> net->stats.tx_errors++;
> netif_start_queue(net);
> @@ -976,11 +990,11 @@ static void read_bulk_callback(struct urb *urb)
> if (urb->actual_length) {
> /* Handle the IP stream, add header and push it onto network
> * stack if the packet is complete. */
> - spin_lock(&odev->net_lock);
> + spin_lock(&odev->parent->lock);
> packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
> (urb->transfer_buffer_length >
> urb->actual_length) ? 1 : 0);
> - spin_unlock(&odev->net_lock);
> + spin_unlock(&odev->parent->lock);
> }
>
> /* We are done with this URB, resubmit it. Prep the USB to wait for
> @@ -1167,17 +1181,17 @@ static void hso_std_serial_read_bulk_callback(struct urb *urb)
> }
> }
> /* Valid data, handle RX data */
> - spin_lock(&serial->serial_lock);
> + spin_lock(&serial->parent->lock);
> serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
> put_rxbuf_data_and_resubmit_bulk_urb(serial);
> - spin_unlock(&serial->serial_lock);
> + spin_unlock(&serial->parent->lock);
> } else if (status == -ENOENT || status == -ECONNRESET) {
> /* Unlinked - check for throttled port. */
> D2("Port %d, successfully unlinked urb", serial->minor);
> - spin_lock(&serial->serial_lock);
> + spin_lock(&serial->parent->lock);
> serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
> hso_resubmit_rx_bulk_urb(serial, urb);
> - spin_unlock(&serial->serial_lock);
> + spin_unlock(&serial->parent->lock);
> } else {
> D2("Port %d, status = %d for read urb", serial->minor, status);
> return;
> @@ -1192,12 +1206,12 @@ void hso_unthrottle_tasklet(struct hso_serial *serial)
> {
> unsigned long flags;
>
> - spin_lock_irqsave(&serial->serial_lock, flags);
> + spin_lock_irqsave(&serial->parent->lock, flags);
> if ((serial->parent->port_spec & HSO_INTF_MUX))
> put_rxbuf_data_and_resubmit_ctrl_urb(serial);
> else
> put_rxbuf_data_and_resubmit_bulk_urb(serial);
> - spin_unlock_irqrestore(&serial->serial_lock, flags);
> + spin_unlock_irqrestore(&serial->parent->lock, flags);
> }
>
> static void hso_unthrottle(struct tty_struct *tty)
> @@ -1322,7 +1336,7 @@ static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
> return -ENODEV;
> }
>
> - spin_lock_irqsave(&serial->serial_lock, flags);
> + spin_lock_irqsave(&serial->parent->lock, flags);
>
> space = serial->tx_data_length - serial->tx_buffer_count;
> tx_bytes = (count < space) ? count : space;
> @@ -1334,7 +1348,7 @@ static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
> serial->tx_buffer_count += tx_bytes;
>
> out:
> - spin_unlock_irqrestore(&serial->serial_lock, flags);
> + spin_unlock_irqrestore(&serial->parent->lock, flags);
>
> hso_kick_transmit(serial);
> /* done */
> @@ -1348,9 +1362,9 @@ static int hso_serial_write_room(struct tty_struct *tty)
> int room;
> unsigned long flags;
>
> - spin_lock_irqsave(&serial->serial_lock, flags);
> + spin_lock_irqsave(&serial->parent->lock, flags);
> room = serial->tx_data_length - serial->tx_buffer_count;
> - spin_unlock_irqrestore(&serial->serial_lock, flags);
> + spin_unlock_irqrestore(&serial->parent->lock, flags);
>
> /* return free room */
> return room;
> @@ -1367,12 +1381,12 @@ static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
> tty->termios->c_cflag, old->c_cflag);
>
> /* the actual setup */
> - spin_lock_irqsave(&serial->serial_lock, flags);
> + spin_lock_irqsave(&serial->parent->lock, flags);
> if (serial->open_count)
> _hso_serial_set_termios(tty, old);
> else
> tty->termios = old;
> - spin_unlock_irqrestore(&serial->serial_lock, flags);
> + spin_unlock_irqrestore(&serial->parent->lock, flags);
>
> /* done */
> return;
> @@ -1389,9 +1403,9 @@ static int hso_serial_chars_in_buffer(struct tty_struct *tty)
> if (serial == NULL)
> return 0;
>
> - spin_lock_irqsave(&serial->serial_lock, flags);
> + spin_lock_irqsave(&serial->parent->lock, flags);
> chars = serial->tx_buffer_count;
> - spin_unlock_irqrestore(&serial->serial_lock, flags);
> + spin_unlock_irqrestore(&serial->parent->lock, flags);
>
> return chars;
> }
> @@ -1408,10 +1422,10 @@ static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
> return -EINVAL;
> }
>
> - spin_lock_irqsave(&serial->serial_lock, flags);
> + spin_lock_irqsave(&serial->parent->lock, flags);
> value = ((serial->rts_state) ? TIOCM_RTS : 0) |
> ((serial->dtr_state) ? TIOCM_DTR : 0);
> - spin_unlock_irqrestore(&serial->serial_lock, flags);
> + spin_unlock_irqrestore(&serial->parent->lock, flags);
>
> return value;
> }
> @@ -1431,7 +1445,7 @@ static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
> }
> if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
>
> - spin_lock_irqsave(&serial->serial_lock, flags);
> + spin_lock_irqsave(&serial->parent->lock, flags);
> if (set & TIOCM_RTS)
> serial->rts_state = 1;
> if (set & TIOCM_DTR)
> @@ -1447,7 +1461,7 @@ static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
> if (serial->rts_state)
> val |= 0x02;
>
> - spin_unlock_irqrestore(&serial->serial_lock, flags);
> + spin_unlock_irqrestore(&serial->parent->lock, flags);
>
> return usb_control_msg(serial->parent->usb,
> usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
> @@ -1462,7 +1476,7 @@ static void hso_kick_transmit(struct hso_serial *serial)
> unsigned long flags;
> int res;
>
> - spin_lock_irqsave(&serial->serial_lock, flags);
> + spin_lock_irqsave(&serial->parent->lock, flags);
> if (!serial->tx_buffer_count)
> goto out;
>
> @@ -1470,7 +1484,8 @@ static void hso_kick_transmit(struct hso_serial *serial)
> goto out;
>
> /* Wakeup USB interface if necessary */
> - if (hso_get_activity(serial->parent) == -EAGAIN)
> + hso_get_activity(serial->parent);
> + if (serial->parent->is_suspended)
> goto out;
>
> /* Switch pointers around to avoid memcpy */
> @@ -1487,7 +1502,7 @@ static void hso_kick_transmit(struct hso_serial *serial)
> serial->tx_urb_used = 1;
> }
> out:
> - spin_unlock_irqrestore(&serial->serial_lock, flags);
> + spin_unlock_irqrestore(&serial->parent->lock, flags);
> }
>
> /* make a request (for reading and writing data to muxed serial port) */
> @@ -1607,7 +1622,7 @@ static void intr_callback(struct urb *urb)
> (1 << i));
> if (serial != NULL) {
> D1("Pending read interrupt on port %d\n", i);
> - spin_lock(&serial->serial_lock);
> + spin_lock(&serial->parent->lock);
> if (serial->rx_state == RX_IDLE) {
> /* Setup and send a ctrl req read on
> * port i */
> @@ -1621,7 +1636,7 @@ static void intr_callback(struct urb *urb)
> D1("Already pending a read on "
> "port %d\n", i);
> }
> - spin_unlock(&serial->serial_lock);
> + spin_unlock(&serial->parent->lock);
> }
> }
> }
> @@ -1655,9 +1670,9 @@ static void hso_std_serial_write_bulk_callback(struct urb *urb)
> return;
> }
>
> - spin_lock(&serial->serial_lock);
> + spin_lock(&serial->parent->lock);
> serial->tx_urb_used = 0;
> - spin_unlock(&serial->serial_lock);
> + spin_unlock(&serial->parent->lock);
> if (status) {
> log_usb_status(status, __func__);
> return;
> @@ -1706,9 +1721,9 @@ static void ctrl_callback(struct urb *urb)
> if (!serial)
> return;
>
> - spin_lock(&serial->serial_lock);
> + spin_lock(&serial->parent->lock);
> serial->tx_urb_used = 0;
> - spin_unlock(&serial->serial_lock);
> + spin_unlock(&serial->parent->lock);
> if (status) {
> log_usb_status(status, __func__);
> return;
> @@ -1724,9 +1739,9 @@ static void ctrl_callback(struct urb *urb)
> (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
> /* response to a read command */
> serial->rx_urb_filled[0] = 1;
> - spin_lock(&serial->serial_lock);
> + spin_lock(&serial->parent->lock);
> put_rxbuf_data_and_resubmit_ctrl_urb(serial);
> - spin_unlock(&serial->serial_lock);
> + spin_unlock(&serial->parent->lock);
> } else {
> hso_put_activity(serial->parent);
> if (serial->tty)
> @@ -1999,7 +2014,7 @@ static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
> /* fill in specific data for later use */
> serial->minor = minor;
> serial->magic = HSO_SERIAL_MAGIC;
> - spin_lock_init(&serial->serial_lock);
> + spin_lock_init(&serial->parent->lock);
> serial->num_rx_urbs = num_urbs;
>
> /* RX, allocate urb and initialize */
> @@ -2140,9 +2155,6 @@ static void hso_net_init(struct net_device *net)
> net->mtu = DEFAULT_MTU - 14;
> net->tx_queue_len = 10;
> SET_ETHTOOL_OPS(net, &ops);
> -
> - /* and initialize the semaphore */
> - spin_lock_init(&hso_net->net_lock);
> }
>
> /* Adds a network device in the network device table */
> @@ -2630,6 +2642,7 @@ static int hso_probe(struct usb_interface *interface,
> goto exit;
> }
>
> + spin_lock_init(&hso_dev->lock);
> usb_driver_claim_interface(&hso_driver, interface, hso_dev);
>
> /* save our data pointer in this device */
> @@ -2669,38 +2682,36 @@ static void async_put_intf(struct work_struct *data)
>
> static int hso_get_activity(struct hso_device *hso_dev)
> {
> - if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
> - if (!hso_dev->is_active) {
> - hso_dev->is_active = 1;
> - schedule_work(&hso_dev->async_get_intf);
> - }
> + if (!hso_dev->is_elevated) {
> + hso_dev->is_elevated = 1;
> + schedule_work(&hso_dev->async_get_intf);
> }
> -
> - if (hso_dev->usb->state != USB_STATE_CONFIGURED)
> - return -EAGAIN;
> -
> - usb_mark_last_busy(hso_dev->usb);
> -
> return 0;
> }
>
> static int hso_put_activity(struct hso_device *hso_dev)
> {
> - if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
> - if (hso_dev->is_active) {
> - hso_dev->is_active = 0;
> - schedule_work(&hso_dev->async_put_intf);
> - return -EAGAIN;
> - }
> + if (hso_dev->is_elevated) {
> + hso_dev->is_elevated = 0;
> + schedule_work(&hso_dev->async_put_intf);
> }
> - hso_dev->is_active = 0;
> return 0;
> }
>
> /* called by kernel when we need to suspend device */
> static int hso_suspend(struct usb_interface *iface, pm_message_t message)
> {
> - int i, result;
> + struct hso_device *pdev = usb_get_intfdata(iface);
> + int i, result = 0;
> +
> + spin_lock_irq(&pdev->lock);
> + if (pdev->usb->auto_pm && pdev->is_active)
> + result = -EBUSY;
> + else
> + pdev->is_suspended = 1;
> + spin_unlock_irq(&pdev->lock);
> + if (result)
> + return result;
>
> /* Stop all serial ports */
> for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
> @@ -2730,6 +2741,7 @@ static int hso_resume(struct usb_interface *iface)
> {
> int i, result = 0;
> struct hso_net *hso_net;
> + struct hso_device *pdev = usb_get_intfdata(iface);
>
> /* Start all serial ports */
> for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
> @@ -2765,6 +2777,10 @@ static int hso_resume(struct usb_interface *iface)
> }
>
> out:
> + spin_lock_irq(&pdev->lock);
> + pdev->is_suspended = 0;
> + spin_unlock_irq(&pdev->lock);
> +
> return result;
> }
>
--
best regards,
D.J. Barrow
Linux Kernel Developer
Option NV, Gaston Geenslaan 14, 3001 Leuven, Belgium
T: +32 16 311 621
F: +32 16 207 164
d.barow@xxxxxxxxxx
www.option.com
Disclaimer:
http://www.option.com/company/disclaimer.shtml
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