lkml.org 
[lkml]   [2009]   [Oct]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[109/136] USB: xhci: Make TRB completion code comparison readable.
2.6.31-stable review patch.  If anyone has any objections, please let us know.

------------------
From: Sarah Sharp <sarah.a.sharp@linux.intel.com>
commit 66d1eebce5cca916e0b08d961690bb01c64751ef upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
drivers/usb/host/xhci-ring.c | 16 +++++++++-------
1 file changed, 9 insertions(+), 7 deletions(-)
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -874,6 +874,7 @@ static int handle_tx_event(struct xhci_h
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_h
(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_h
/* 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_h
}
} 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_h
}
}
} 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_h
/* 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.



\
 
 \ /
  Last update: 2009-10-02 03:45    [from the cache]
©2003-2011 Jasper Spaans