On Thu, Jun 21, 2007 at 05:17:42PM -0400, Alan Stern wrote: > On Thu, 21 Jun 2007, ok wrote: > > Do you mean something like that below? I haven't tested it. > > Yes, something very much like this. It could be simplified a little; > in a couple of places where you have > > finish_request(); > spin_unlock(); > continue; > > you ought to be able to use a "goto" or "break" instead. Also there > are a few minor problems, like calling finish_request before it is > declared and calling it before releasing urb->lock, but those can > easily be fixed.
Yes, I made a mistake with urb->lock. OK, moved finish_request unmodified up in the file, got fatter patch. The one below. > If you like, I'll try revising your patch. You'll have to test it Yes, thanks. > though; I don't have the hardware. Sure. Olav --- linux-2.6.22-rc5-or/drivers/usb/host/isp116x-hcd.c 2007-06-17 05:09:12.000000000 +0300 +++ linux-2.6.22-rc5-isp/drivers/usb/host/isp116x-hcd.c 2007-06-23 00:22:01.000000000 +0300 @@ -275,6 +275,61 @@ } /* + Take done or failed requests out of schedule. Give back + processed urbs. +*/ +static void finish_request(struct isp116x *isp116x, struct isp116x_ep *ep, + struct urb *urb) +__releases(isp116x->lock) __acquires(isp116x->lock) +{ + unsigned i; + + urb->hcpriv = NULL; + ep->error_count = 0; + + if (usb_pipecontrol(urb->pipe)) + ep->nextpid = USB_PID_SETUP; + + urb_dbg(urb, "Finish"); + + spin_unlock(&isp116x->lock); + usb_hcd_giveback_urb(isp116x_to_hcd(isp116x), urb); + spin_lock(&isp116x->lock); + + /* take idle endpoints out of the schedule */ + if (!list_empty(&ep->hep->urb_list)) + return; + + /* async deschedule */ + if (!list_empty(&ep->schedule)) { + list_del_init(&ep->schedule); + return; + } + + /* periodic deschedule */ + DBG("deschedule qh%d/%p branch %d\n", ep->period, ep, ep->branch); + for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) { + struct isp116x_ep *temp; + struct isp116x_ep **prev = &isp116x->periodic[i]; + + while (*prev && ((temp = *prev) != ep)) + prev = &temp->next; + if (*prev) + *prev = ep->next; + isp116x->load[i] -= ep->load; + } + ep->branch = PERIODIC_SIZE; + isp116x_to_hcd(isp116x)->self.bandwidth_allocated -= + ep->load / ep->period; + + /* switch irq type? */ + if (!--isp116x->periodic_count) { + isp116x->irqenb &= ~HCuPINT_SOF; + isp116x->irqenb |= HCuPINT_ATL; + } +} + +/* Analyze transfer results, handle partial transfers and errors */ static void postproc_atl_queue(struct isp116x *isp116x) @@ -296,11 +351,6 @@ short_not_ok = 1; spin_lock(&urb->lock); - /* Data underrun is special. For allowed underrun - we clear the error and continue as normal. For - forbidden underrun we finish the DATA stage - immediately while for control transfer, - we do a STATUS stage. */ if (cc == TD_DATAUNDERRUN) { if (!(urb->transfer_flags & URB_SHORT_NOT_OK)) { DBG("Allowed data underrun\n"); @@ -308,22 +358,14 @@ short_not_ok = 0; } else { ep->error_count = 1; - if (usb_pipecontrol(urb->pipe)) - ep->nextpid = USB_PID_ACK; - else - usb_settoggle(udev, ep->epnum, - ep->nextpid == - USB_PID_OUT, - PTD_GET_TOGGLE(ptd)); + usb_settoggle(udev, ep->epnum, + ep->nextpid == USB_PID_OUT, + PTD_GET_TOGGLE(ptd)); urb->actual_length += PTD_GET_COUNT(ptd); urb->status = cc_to_error[TD_DATAUNDERRUN]; - spin_unlock(&urb->lock); - continue; + goto done; } } - /* Keep underrun error through the STATUS stage */ - if (urb->status == cc_to_error[TD_DATAUNDERRUN]) - cc = TD_DATAUNDERRUN; if (cc != TD_CC_NOERROR && cc != TD_NOTACCESSED && (++ep->error_count >= 3 || cc == TD_CC_STALL @@ -332,8 +374,7 @@ urb->status = cc_to_error[cc]; if (ep->nextpid == USB_PID_ACK) ep->nextpid = 0; - spin_unlock(&urb->lock); - continue; + goto done; } /* According to usb spec, zero-length Int transfer signals finishing of the urb. Hey, does this apply only @@ -341,8 +382,7 @@ if (usb_pipeint(urb->pipe) && !PTD_GET_LEN(ptd)) { if (urb->status == -EINPROGRESS) urb->status = 0; - spin_unlock(&urb->lock); - continue; + goto done; } /* Relax after previously failed, but later succeeded @@ -409,62 +449,10 @@ default: BUG(); } + done: spin_unlock(&urb->lock); - } -} - -/* - Take done or failed requests out of schedule. Give back - processed urbs. -*/ -static void finish_request(struct isp116x *isp116x, struct isp116x_ep *ep, - struct urb *urb) -__releases(isp116x->lock) __acquires(isp116x->lock) -{ - unsigned i; - - urb->hcpriv = NULL; - ep->error_count = 0; - - if (usb_pipecontrol(urb->pipe)) - ep->nextpid = USB_PID_SETUP; - - urb_dbg(urb, "Finish"); - - spin_unlock(&isp116x->lock); - usb_hcd_giveback_urb(isp116x_to_hcd(isp116x), urb); - spin_lock(&isp116x->lock); - - /* take idle endpoints out of the schedule */ - if (!list_empty(&ep->hep->urb_list)) - return; - - /* async deschedule */ - if (!list_empty(&ep->schedule)) { - list_del_init(&ep->schedule); - return; - } - - /* periodic deschedule */ - DBG("deschedule qh%d/%p branch %d\n", ep->period, ep, ep->branch); - for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) { - struct isp116x_ep *temp; - struct isp116x_ep **prev = &isp116x->periodic[i]; - - while (*prev && ((temp = *prev) != ep)) - prev = &temp->next; - if (*prev) - *prev = ep->next; - isp116x->load[i] -= ep->load; - } - ep->branch = PERIODIC_SIZE; - isp116x_to_hcd(isp116x)->self.bandwidth_allocated -= - ep->load / ep->period; - - /* switch irq type? */ - if (!--isp116x->periodic_count) { - isp116x->irqenb &= ~HCuPINT_SOF; - isp116x->irqenb |= HCuPINT_ATL; + if (urb->status != -EINPROGRESS) + finish_request(isp116x, ep, urb); } } @@ -570,9 +558,6 @@ */ static void finish_atl_transfers(struct isp116x *isp116x) { - struct isp116x_ep *ep; - struct urb *urb; - if (!isp116x->atl_active) return; /* Fifo not ready? */ @@ -582,16 +567,6 @@ atomic_inc(&isp116x->atl_finishing); unpack_fifo(isp116x); postproc_atl_queue(isp116x); - for (ep = isp116x->atl_active; ep; ep = ep->active) { - urb = - container_of(ep->hep->urb_list.next, struct urb, urb_list); - /* USB_PID_ACK check here avoids finishing of - control transfers, for which TD_DATAUNDERRUN - occured, while URB_SHORT_NOT_OK was set */ - if (urb && urb->status != -EINPROGRESS - && ep->nextpid != USB_PID_ACK) - finish_request(isp116x, ep, urb); - } atomic_dec(&isp116x->atl_finishing); } ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. 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