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USB: xhci: Make TRB completion code comparison readable.

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Use trb_comp_code instead of getting the completion code from the transfer
event every time.

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Sarah Sharp 2009-08-27 14:35:53 -07:00 committed by Greg Kroah-Hartman
parent ac9d8fe7c6
commit 66d1eebce5
1 changed files with 9 additions and 7 deletions
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16
drivers/usb/host/xhci-ring.c
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@ -874,6 +874,7 @@ static int handle_tx_event(struct xhci_hcd *xhci,
struct urb *urb = 0;
int status = -EINPROGRESS;
struct xhci_ep_ctx *ep_ctx;
u32 trb_comp_code;
xhci_dbg(xhci, "In %s\n", __func__);
slot_id = TRB_TO_SLOT_ID(event->flags);
@ -931,7 +932,8 @@ static int handle_tx_event(struct xhci_hcd *xhci,
(unsigned int) event->flags);
/* Look for common error cases */
switch (GET_COMP_CODE(event->transfer_len)) {
trb_comp_code = GET_COMP_CODE(event->transfer_len);
switch (trb_comp_code) {
/* Skip codes that require special handling depending on
* transfer type
*/
@ -974,7 +976,7 @@ static int handle_tx_event(struct xhci_hcd *xhci,
/* Was this a control transfer? */
if (usb_endpoint_xfer_control(&td->urb->ep->desc)) {
xhci_debug_trb(xhci, xhci->event_ring->dequeue);
switch (GET_COMP_CODE(event->transfer_len)) {
switch (trb_comp_code) {
case COMP_SUCCESS:
if (event_trb == ep_ring->dequeue) {
xhci_warn(xhci, "WARN: Success on ctrl setup TRB without IOC set??\n");
@ -1031,7 +1033,7 @@ static int handle_tx_event(struct xhci_hcd *xhci,
}
} else {
/* Maybe the event was for the data stage? */
if (GET_COMP_CODE(event->transfer_len) != COMP_STOP_INVAL) {
if (trb_comp_code != COMP_STOP_INVAL) {
/* We didn't stop on a link TRB in the middle */
td->urb->actual_length =
td->urb->transfer_buffer_length -
@ -1043,7 +1045,7 @@ static int handle_tx_event(struct xhci_hcd *xhci,
}
}
} else {
switch (GET_COMP_CODE(event->transfer_len)) {
switch (trb_comp_code) {
case COMP_SUCCESS:
/* Double check that the HW transferred everything. */
if (event_trb != td->last_trb) {
@ -1120,14 +1122,14 @@ static int handle_tx_event(struct xhci_hcd *xhci,
/* If the ring didn't stop on a Link or No-op TRB, add
* in the actual bytes transferred from the Normal TRB
*/
if (GET_COMP_CODE(event->transfer_len) != COMP_STOP_INVAL)
if (trb_comp_code != COMP_STOP_INVAL)
td->urb->actual_length +=
TRB_LEN(cur_trb->generic.field[2]) -
TRB_LEN(event->transfer_len);
}
}
if (GET_COMP_CODE(event->transfer_len) == COMP_STOP_INVAL ||
GET_COMP_CODE(event->transfer_len) == COMP_STOP) {
if (trb_comp_code == COMP_STOP_INVAL ||
trb_comp_code == COMP_STOP) {
/* The Endpoint Stop Command completion will take care of any
* stopped TDs. A stopped TD may be restarted, so don't update
* the ring dequeue pointer or take this TD off any lists yet.