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xhci: Refactor command watchdog and fix split string.

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In preparation for fixing this function for streams endpoints, refactor
code in the command watchdog timeout function into two new functions.
One kills all URBs on a ring (either stream or endpoint), the other
kills all URBs associated with an endpoint.  Fix a split string while
we're at it.

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
This commit is contained in:
Sarah Sharp 2014-02-21 09:27:30 -08:00
parent 7cace978fb
commit 50e8725e7c
1 changed files with 39 additions and 31 deletions
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70
drivers/usb/host/xhci-ring.c
View file

@ -900,6 +900,43 @@ static void xhci_handle_cmd_stop_ep(struct xhci_hcd *xhci, int slot_id,
/* Return to the event handler with xhci->lock re-acquired */
}
static void xhci_kill_ring_urbs(struct xhci_hcd *xhci, struct xhci_ring *ring)
{
struct xhci_td *cur_td;
while (!list_empty(&ring->td_list)) {
cur_td = list_first_entry(&ring->td_list,
struct xhci_td, td_list);
list_del_init(&cur_td->td_list);
if (!list_empty(&cur_td->cancelled_td_list))
list_del_init(&cur_td->cancelled_td_list);
xhci_giveback_urb_in_irq(xhci, cur_td, -ESHUTDOWN);
}
}
static void xhci_kill_endpoint_urbs(struct xhci_hcd *xhci,
int slot_id, int ep_index)
{
struct xhci_td *cur_td;
struct xhci_virt_ep *ep;
struct xhci_ring *ring;
ep = &xhci->devs[slot_id]->eps[ep_index];
ring = ep->ring;
if (!ring)
return;
xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
"Killing URBs for slot ID %u, ep index %u",
slot_id, ep_index);
xhci_kill_ring_urbs(xhci, ring);
while (!list_empty(&ep->cancelled_td_list)) {
cur_td = list_first_entry(&ep->cancelled_td_list,
struct xhci_td, cancelled_td_list);
list_del_init(&cur_td->cancelled_td_list);
xhci_giveback_urb_in_irq(xhci, cur_td, -ESHUTDOWN);
}
}
/* Watchdog timer function for when a stop endpoint command fails to complete.
* In this case, we assume the host controller is broken or dying or dead. The
* host may still be completing some other events, so we have to be careful to
@ -923,9 +960,6 @@ void xhci_stop_endpoint_command_watchdog(unsigned long arg)
{
struct xhci_hcd *xhci;
struct xhci_virt_ep *ep;
struct xhci_virt_ep *temp_ep;
struct xhci_ring *ring;
struct xhci_td *cur_td;
int ret, i, j;
unsigned long flags;
@ -982,34 +1016,8 @@ void xhci_stop_endpoint_command_watchdog(unsigned long arg)
for (i = 0; i < MAX_HC_SLOTS; i++) {
if (!xhci->devs[i])
continue;
for (j = 0; j < 31; j++) {
temp_ep = &xhci->devs[i]->eps[j];
ring = temp_ep->ring;
if (!ring)
continue;
xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
"Killing URBs for slot ID %u, "
"ep index %u", i, j);
while (!list_empty(&ring->td_list)) {
cur_td = list_first_entry(&ring->td_list,
struct xhci_td,
td_list);
list_del_init(&cur_td->td_list);
if (!list_empty(&cur_td->cancelled_td_list))
list_del_init(&cur_td->cancelled_td_list);
xhci_giveback_urb_in_irq(xhci, cur_td,
-ESHUTDOWN);
}
while (!list_empty(&temp_ep->cancelled_td_list)) {
cur_td = list_first_entry(
&temp_ep->cancelled_td_list,
struct xhci_td,
cancelled_td_list);
list_del_init(&cur_td->cancelled_td_list);
xhci_giveback_urb_in_irq(xhci, cur_td,
-ESHUTDOWN);
}
}
for (j = 0; j < 31; j++)
xhci_kill_endpoint_urbs(xhci, i, j);
}
spin_unlock_irqrestore(&xhci->lock, flags);
xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,