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USB: centralize -EREMOTEIO handling

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This patch (as969) continues the ongoing changes to the way HCDs
report URB statuses.  The programming interface has been simplified by
making usbcore responsible for clearing urb->hcpriv and for setting
-EREMOTEIO status when an URB with the URB_SHORT_NOT_OK flag ends up
as a short transfer.

By moving the work out of the HCDs, this removes a fair amount of
repeated code.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: David Brownell <david-b@pacbell.net>
CC: Olav Kongas <ok@artecdesign.ee>
CC: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
CC: Tony Olech <tony.olech@elandigitalsystems.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern 2007-08-21 15:39:21 -04:00 committed by Greg Kroah-Hartman
parent ee7d1f3f0c
commit b0d9efba3e
9 changed files with 18 additions and 60 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

9
drivers/usb/core/hcd.c
View file

@ -366,6 +366,7 @@ static int rh_call_control (struct usb_hcd *hcd, struct urb *urb)
spin_unlock_irq(&hcd_root_hub_lock);
if (status)
return status;
urb->hcpriv = hcd; /* Indicate it's queued */
cmd = (struct usb_ctrlrequest *) urb->setup_packet;
typeReq = (cmd->bRequestType << 8) | cmd->bRequest;
@ -579,7 +580,6 @@ void usb_hcd_poll_rh_status(struct usb_hcd *hcd)
hcd->poll_pending = 0;
hcd->status_urb = NULL;
urb->status = 0;
urb->hcpriv = NULL;
urb->actual_length = length;
memcpy(urb->transfer_buffer, buffer, length);
@ -675,7 +675,6 @@ static int usb_rh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
del_timer (&hcd->rh_timer);
if (urb == hcd->status_urb) {
hcd->status_urb = NULL;
urb->hcpriv = NULL;
usb_hcd_unlink_urb_from_ep(hcd, urb);
spin_unlock(&hcd_root_hub_lock);
@ -1192,6 +1191,7 @@ int usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags)
if (unlikely(status)) {
usbmon_urb_submit_error(&hcd->self, urb, status);
unmap_urb_for_dma(hcd, urb);
urb->hcpriv = NULL;
INIT_LIST_HEAD(&urb->urb_list);
atomic_dec(&urb->use_count);
if (urb->reject)
@ -1265,6 +1265,11 @@ void usb_hcd_giveback_urb (struct usb_hcd *hcd, struct urb *urb)
unmap_urb_for_dma(hcd, urb);
usbmon_urb_complete (&hcd->self, urb);
usb_unanchor_urb(urb);
urb->hcpriv = NULL;
if (unlikely((urb->transfer_flags & URB_SHORT_NOT_OK) &&
urb->actual_length < urb->transfer_buffer_length &&
!urb->status))
urb->status = -EREMOTEIO;
/* pass ownership to the completion handler */
urb->complete (urb);

9
drivers/usb/gadget/dummy_hcd.c
View file

@ -1099,8 +1099,7 @@ top:
*
* partially filling a buffer optionally blocks queue advances
* (so completion handlers can clean up the queue) but we don't
* need to emulate such data-in-flight. so we only show part
* of the URB_SHORT_NOT_OK effect: completion status.
* need to emulate such data-in-flight.
*/
if (is_short) {
if (host_len == dev_len) {
@ -1111,10 +1110,7 @@ top:
if (dev_len > host_len)
maybe_set_status (urb, -EOVERFLOW);
else
maybe_set_status (urb,
(urb->transfer_flags
& URB_SHORT_NOT_OK)
? -EREMOTEIO : 0);
maybe_set_status (urb, 0);
} else if (!to_host) {
maybe_set_status (urb, 0);
if (host_len > dev_len)
@ -1516,7 +1512,6 @@ restart:
continue;
return_urb:
urb->hcpriv = NULL;
list_del (&urbp->urbp_list);
kfree (urbp);
if (ep)

7
drivers/usb/host/ehci-q.c
View file

@ -232,7 +232,6 @@ __acquires(ehci->lock)
}
spin_lock (&urb->lock);
urb->hcpriv = NULL;
switch (urb->status) {
case -EINPROGRESS: /* success */
urb->status = 0;
@ -395,8 +394,10 @@ halt:
/* remove it from the queue */
spin_lock (&urb->lock);
qtd_copy_status (ehci, urb, qtd->length, token);
do_status = (urb->status == -EREMOTEIO)
&& usb_pipecontrol (urb->pipe);
if (unlikely(urb->status == -EREMOTEIO)) {
do_status = usb_pipecontrol(urb->pipe);
urb->status = 0;
}
spin_unlock (&urb->lock);
if (stopped && qtd->qtd_list.prev != &qh->qtd_list) {

8
drivers/usb/host/isp116x-hcd.c
View file

@ -282,7 +282,6 @@ __releases(isp116x->lock) __acquires(isp116x->lock)
{
unsigned i;
urb->hcpriv = NULL;
ep->error_count = 0;
if (usb_pipecontrol(urb->pipe))
@ -446,12 +445,7 @@ static void postproc_atl_queue(struct isp116x *isp116x)
if (PTD_GET_ACTIVE(ptd)
|| (cc != TD_CC_NOERROR && cc < 0x0E))
break;
if ((urb->transfer_flags & URB_SHORT_NOT_OK) &&
urb->actual_length <
urb->transfer_buffer_length)
status = -EREMOTEIO;
else
status = 0;
status = 0;
ep->nextpid = 0;
break;
default:

11
drivers/usb/host/ohci-q.c
View file

@ -43,21 +43,10 @@ __acquires(ohci->lock)
// ASSERT (urb->hcpriv != 0);
urb_free_priv (ohci, urb->hcpriv);
urb->hcpriv = NULL;
spin_lock (&urb->lock);
if (likely (urb->status == -EINPROGRESS))
urb->status = 0;
/* report short control reads right even though the data TD always
* has TD_R set. (much simpler, but creates the 1-td limit.)
*/
if (unlikely (urb->transfer_flags & URB_SHORT_NOT_OK)
&& unlikely (usb_pipecontrol (urb->pipe))
&& urb->actual_length < urb->transfer_buffer_length
&& usb_pipein (urb->pipe)
&& urb->status == 0) {
urb->status = -EREMOTEIO;
}
spin_unlock (&urb->lock);
switch (usb_pipetype (urb->pipe)) {

7
drivers/usb/host/r8a66597-hcd.c
View file

@ -783,7 +783,6 @@ static void force_dequeue(struct r8a66597 *r8a66597, u16 pipenum, u16 address)
if (urb) {
urb->status = -ENODEV;
urb->hcpriv = NULL;
usb_hcd_unlink_urb_from_ep(r8a66597_to_hcd(r8a66597),
urb);
@ -1134,7 +1133,6 @@ __releases(r8a66597->lock) __acquires(r8a66597->lock)
if (usb_pipeisoc(urb->pipe))
urb->start_frame = r8a66597_get_frame(hcd);
urb->hcpriv = NULL;
usb_hcd_unlink_urb_from_ep(r8a66597_to_hcd(r8a66597), urb);
spin_unlock(&r8a66597->lock);
@ -1202,9 +1200,6 @@ static void packet_read(struct r8a66597 *r8a66597, u16 pipenum)
td->zero_packet = 1;
if (rcv_len < bufsize) {
td->short_packet = 1;
if (urb->transfer_buffer_length != urb->actual_length &&
urb->transfer_flags & URB_SHORT_NOT_OK)
status = -EREMOTEIO;
}
if (usb_pipeisoc(urb->pipe)) {
urb->iso_frame_desc[td->iso_cnt].actual_length = size;
@ -1214,7 +1209,7 @@ static void packet_read(struct r8a66597 *r8a66597, u16 pipenum)
}
/* check transfer finish */
if (check_transfer_finish(td, urb)) {
if (finish || check_transfer_finish(td, urb)) {
pipe_stop(r8a66597, td->pipe);
pipe_irq_disable(r8a66597, pipenum);
finish = 1;

14
drivers/usb/host/sl811-hcd.c
View file

@ -438,7 +438,6 @@ static void finish_request(
spin_lock(&urb->lock);
if (urb->status == -EINPROGRESS)
urb->status = status;
urb->hcpriv = NULL;
spin_unlock(&urb->lock);
usb_hcd_unlink_urb_from_ep(sl811_to_hcd(sl811), urb);
@ -545,17 +544,10 @@ done(struct sl811 *sl811, struct sl811h_ep *ep, u8 bank)
sl811_read_buf(sl811, SL811HS_PACKET_BUF(bank == 0),
buf, len);
usb_dotoggle(udev, ep->epnum, 0);
if (urb->actual_length == urb->transfer_buffer_length)
if (urb->actual_length == urb->transfer_buffer_length
|| len < ep->maxpacket)
urbstat = 0;
else if (len < ep->maxpacket) {
if (urb->transfer_flags & URB_SHORT_NOT_OK)
urbstat = -EREMOTEIO;
else
urbstat = 0;
}
if (usb_pipecontrol(urb->pipe)
&& (urbstat == -EREMOTEIO
|| urbstat == 0)) {
if (usb_pipecontrol(urb->pipe) && urbstat == 0) {
/* NOTE if the status stage STALLs (why?),
* this reports the wrong urb status.

5
drivers/usb/host/u132-hcd.c
View file

@ -519,7 +519,6 @@ static void u132_hcd_giveback_urb(struct u132 *u132, struct u132_endp *endp,
struct usb_hcd *hcd = u132_to_hcd(u132);
urb->error_count = 0;
urb->status = status;
urb->hcpriv = NULL;
spin_lock_irqsave(&endp->queue_lock.slock, irqs);
usb_hcd_unlink_urb_from_ep(hcd, urb);
endp->queue_next += 1;
@ -560,7 +559,6 @@ static void u132_hcd_abandon_urb(struct u132 *u132, struct u132_endp *endp,
struct usb_hcd *hcd = u132_to_hcd(u132);
urb->error_count = 0;
urb->status = status;
urb->hcpriv = NULL;
spin_lock_irqsave(&endp->queue_lock.slock, irqs);
usb_hcd_unlink_urb_from_ep(hcd, urb);
endp->queue_next += 1;
@ -2430,7 +2428,6 @@ static int dequeue_from_overflow_chain(struct u132 *u132,
list_del(scan);
endp->queue_size -= 1;
urb->error_count = 0;
urb->hcpriv = NULL;
usb_hcd_giveback_urb(hcd, urb);
return 0;
} else
@ -2472,7 +2469,6 @@ static int u132_endp_urb_dequeue(struct u132 *u132, struct u132_endp *endp,
endp->edset_flush = 1;
u132_endp_queue_work(u132, endp, 0);
spin_unlock_irqrestore(&endp->queue_lock.slock, irqs);
urb->hcpriv = NULL;
return 0;
} else {
spin_unlock_irqrestore(&endp->queue_lock.slock, irqs);
@ -2517,7 +2513,6 @@ static int u132_endp_urb_dequeue(struct u132 *u132, struct u132_endp *endp,
irqs);
kfree(urbq);
} urb->error_count = 0;
urb->hcpriv = NULL;
usb_hcd_giveback_urb(hcd, urb);
return 0;
} else if (list_empty(&endp->urb_more)) {

8
drivers/usb/host/uhci-q.c
View file

@ -757,7 +757,6 @@ static void uhci_free_urb_priv(struct uhci_hcd *uhci,
uhci_free_td(uhci, td);
}
urbp->urb->hcpriv = NULL;
kmem_cache_free(uhci_up_cachep, urbp);
}
@ -1494,13 +1493,6 @@ __acquires(uhci->lock)
* unlinked first. Regardless, don't confuse people with a
* negative length. */
urb->actual_length = max(urb->actual_length, 0);
/* Report erroneous short transfers */
if (unlikely((urb->transfer_flags & URB_SHORT_NOT_OK) &&
urb->actual_length <
urb->transfer_buffer_length &&
urb->status == 0))
urb->status = -EREMOTEIO;
}
/* When giving back the first URB in an Isochronous queue,