If there's any debug, system or other information that you may want,
or even just a better description of the problem feel free to ask.
I've got abundance of boxen here with varying chipset (atleast Via, Ali,
Sis, Compaq and Intel) that I can test patches against.
> On Sat, Apr 13, 2002, Stanislav Meduna <stano@meduna.org> wrote:
> > trying to load a uhci module from 2.4.19-pre6 at boot locks my computer.
> >
> > In 2.4.18 I noticed that the USB printing stopped to work
> > (see the thread "USB printing via ptal broke between 2.4.17 and .18"
> > started on 29 Mar). I the tested 2.4.19-pre5 and loading the uhci
> > module locked the machine. In -pre6 the behaviour is the same.
> >
> > Can I switch some debug mode on to help you seeing where the thing
> > locks?
> >
> > This is on the Abit BP6 motherboard (Celeron SMP box). I see that
> > there are quite a few changes in the uhci area - please, don't
> > make final 2.4.19 until these issues are resolved.
> >
> > Using usb-uhci is not an option for me, as it is causing lockups
> > when printing to a USB printer (and ever did so). uhci was OK
> > in this regard up to 2.4.17.
>
> Apply these patches. They should be in -pre7 (or -rc1, depending on what
> Marcelo calls it).
>
> This should fix all outstanding lockups and performance problems with
> uhci.c. Let me know how it goes for you.
>
> JE
>
> --- linux-2.4.19-pre6.orig/drivers/usb/uhci.c Sun Apr 7 13:22:10 2002
> +++ linux-2.4.19-pre6/drivers/usb/uhci.c Sun Apr 7 13:25:27 2002
> @@ -1811,6 +1811,9 @@
> } else {
> urb->status = -ENOENT;
>
> + spin_unlock(&urb->lock);
> + spin_unlock_irqrestore(&uhci->urb_list_lock, flags);
> +
> if (in_interrupt()) { /* wait at least 1 frame */
> static int errorcount = 10;
>
> @@ -1820,9 +1823,6 @@
> } else
> schedule_timeout(1+1*HZ/1000);
>
> - spin_unlock(&urb->lock);
> - spin_unlock_irqrestore(&uhci->urb_list_lock, flags);
> -
> uhci_call_completion(urb);
> }
> }
> @@ -2193,12 +2193,12 @@
> OK(0);
> case RH_PORT_RESET:
> SET_RH_PORTSTAT(USBPORTSC_PR);
> - wait_ms(50); /* USB v1.1 7.1.7.3 */
> + mdelay(50); /* USB v1.1 7.1.7.3 */
> uhci->rh.c_p_r[wIndex - 1] = 1;
> CLR_RH_PORTSTAT(USBPORTSC_PR);
> udelay(10);
> SET_RH_PORTSTAT(USBPORTSC_PE);
> - wait_ms(10);
> + mdelay(10);
> SET_RH_PORTSTAT(0xa);
> OK(0);
> case RH_PORT_POWER:
>
>
> --- linux-2.4.19-pre6.orig/drivers/usb/uhci.c Sun Apr 7 16:21:04 2002
> +++ linux-2.4.19-pre6/drivers/usb/uhci.c Sun Apr 7 16:24:03 2002
> @@ -748,7 +748,7 @@
>
> if ((!(urb->transfer_flags & USB_NO_FSBR)) && !urbp->fsbr) {
> urbp->fsbr = 1;
> - if (!uhci->fsbr++)
> + if (!uhci->fsbr++ && !uhci->fsbrtimeout)
> uhci->skel_term_qh->link = uhci->skel_hs_control_qh->dma_handle | UHCI_PTR_QH;
> }
>
> @@ -2739,6 +2739,11 @@
> /* Reset here so we don't get any interrupts from an old setup */
> /* or broken setup */
> reset_hc(uhci);
> +
> + uhci->fsbr = 0;
> + uhci->fsbrtimeout = 0;
> +
> + uhci->is_suspended = 0;
>
> spin_lock_init(&uhci->qh_remove_list_lock);
> INIT_LIST_HEAD(&uhci->qh_remove_list);
>
>
> --- linux-2.4.19-pre6.orig/drivers/usb/uhci.c Sun Apr 7 16:27:23 2002
> +++ linux-2.4.19-pre6/drivers/usb/uhci.c Sun Apr 7 16:28:23 2002
> @@ -1837,10 +1837,6 @@
>
> uhci_dec_fsbr(uhci, urb);
>
> - /* There is a race with updating IOC in here, but it's not worth */
> - /* trying to fix since this is merely an optimization. The only */
> - /* time we'd lose is if the status of the packet got updated */
> - /* and we'd be turning on FSBR next frame anyway, so it's a wash */
> urbp->fsbr_timeout = 1;
>
> head = &urbp->td_list;
> @@ -2004,23 +2000,23 @@
> tmp = head->next;
> while (tmp != head) {
> struct urb *u = list_entry(tmp, struct urb, urb_list);
> - struct urb_priv *urbp = (struct urb_priv *)u->hcpriv;
> + struct urb_priv *up = (struct urb_priv *)u->hcpriv;
>
> tmp = tmp->next;
>
> - spin_lock(&urb->lock);
> + spin_lock(&u->lock);
>
> /* Check if the FSBR timed out */
> - if (urbp->fsbr && !urbp->fsbr_timeout && time_after_eq(jiffies, urbp->fsbrtime + IDLE_TIMEOUT))
> + if (up->fsbr && !up->fsbr_timeout && time_after_eq(jiffies, up->fsbrtime + IDLE_TIMEOUT))
> uhci_fsbr_timeout(uhci, u);
>
> /* Check if the URB timed out */
> - if (u->timeout && time_after_eq(jiffies, urbp->inserttime + u->timeout)) {
> + if (u->timeout && time_after_eq(jiffies, up->inserttime + u->timeout)) {
> list_del(&u->urb_list);
> list_add_tail(&u->urb_list, &list);
> }
>
> - spin_unlock(&urb->lock);
> + spin_unlock(&u->lock);
> }
> spin_unlock_irqrestore(&uhci->urb_list_lock, flags);
>
>
> --- linux-2.4.19-pre6.orig/drivers/usb/uhci.c Sun Apr 7 16:29:57 2002
> +++ linux-2.4.19-pre6/drivers/usb/uhci.c Sun Apr 7 16:22:49 2002
> @@ -1622,8 +1622,7 @@
>
> if (urb->status != -EINPROGRESS) {
> info("uhci_transfer_result: called for URB %p not in flight?", urb);
> - spin_unlock_irqrestore(&urb->lock, flags);
> - return;
> + goto out;
> }
>
> switch (usb_pipetype(urb->pipe)) {
> @@ -1643,10 +1642,8 @@
>
> urbp->status = ret;
>
> - if (ret == -EINPROGRESS) {
> - spin_unlock_irqrestore(&urb->lock, flags);
> - return;
> - }
> + if (ret == -EINPROGRESS)
> + goto out;
>
> switch (usb_pipetype(urb->pipe)) {
> case PIPE_CONTROL:
> @@ -1660,11 +1657,8 @@
> break;
> case PIPE_INTERRUPT:
> /* Interrupts are an exception */
> - if (urb->interval) {
> - uhci_add_complete(urb);
> - spin_unlock_irqrestore(&urb->lock, flags);
> - return; /* <-- note return */
> - }
> + if (urb->interval)
> + goto out_complete;
>
> /* Release bandwidth for Interrupt or Isoc. transfers */
> /* Spinlock needed ? */
> @@ -1680,8 +1674,10 @@
> /* Remove it from uhci->urb_list */
> list_del_init(&urb->urb_list);
>
> +out_complete:
> uhci_add_complete(urb);
>
> +out:
> spin_unlock_irqrestore(&urb->lock, flags);
> }
>
> @@ -2710,6 +2706,7 @@
> }
>
> uhci->dev = dev;
> + uhci->irq = dev->irq;
> uhci->io_addr = io_addr;
> uhci->io_size = io_size;
> pci_set_drvdata(dev, uhci);
> @@ -2922,8 +2919,6 @@
>
> if (request_irq(dev->irq, uhci_interrupt, SA_SHIRQ, "usb-uhci", uhci))
> goto err_request_irq;
> -
> - uhci->irq = dev->irq;
>
> /* disable legacy emulation */
> pci_write_config_word(uhci->dev, USBLEGSUP, USBLEGSUP_DEFAULT);
> --- linux-2.4.19-pre6.orig/drivers/usb/uhci.h Sun Apr 7 13:22:10 2002
> +++ linux-2.4.19-pre6/drivers/usb/uhci.h Sun Apr 7 16:16:55 2002
> @@ -287,16 +287,16 @@
> struct uhci {
> struct pci_dev *dev;
>
> +#ifdef CONFIG_PROC_FS
> /* procfs */
> int num;
> struct proc_dir_entry *proc_entry;
> +#endif
>
> /* Grabbed from PCI */
> int irq;
> unsigned int io_addr;
> unsigned int io_size;
> -
> - struct list_head uhci_list;
>
> struct pci_pool *qh_pool;
> struct pci_pool *td_pool;
> -
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--
Tommi Kynde Kyntola kynde@ts.ray.fi
"A man alone in the forest talking to himself and
no women around to hear him. Is he still wrong?"
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