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authorAlan Stern <stern@rowland.harvard.edu>2007-08-24 15:40:10 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2007-10-12 14:55:21 -0700
commit4d2f110c51eec853c50f68cf068888a77551c8d3 (patch)
tree0994331b5cde04b379a8e7212596ec7fc4448639 /drivers/usb
parente7beb667842ad0f6ec95a22e7c88e71dfbd60649 (diff)
USB: reorganize urb->status use in dummy-hcd
This patch (as973) reorganizes the way dummy-hcd sets urb->status. It now keeps the information in a local variable until the last moment. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/gadget/dummy_hcd.c53
1 files changed, 24 insertions, 29 deletions
diff --git a/drivers/usb/gadget/dummy_hcd.c b/drivers/usb/gadget/dummy_hcd.c
index f2b124cf320..c1af7bab26f 100644
--- a/drivers/usb/gadget/dummy_hcd.c
+++ b/drivers/usb/gadget/dummy_hcd.c
@@ -1026,16 +1026,10 @@ static int dummy_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
return rc;
}
-static void maybe_set_status (struct urb *urb, int status)
-{
- spin_lock (&urb->lock);
- urb->status = status;
- spin_unlock (&urb->lock);
-}
-
/* transfer up to a frame's worth; caller must own lock */
static int
-transfer (struct dummy *dum, struct urb *urb, struct dummy_ep *ep, int limit)
+transfer(struct dummy *dum, struct urb *urb, struct dummy_ep *ep, int limit,
+ int *status)
{
struct dummy_request *req;
@@ -1103,15 +1097,15 @@ top:
if (is_short) {
if (host_len == dev_len) {
req->req.status = 0;
- maybe_set_status (urb, 0);
+ *status = 0;
} else if (to_host) {
req->req.status = 0;
if (dev_len > host_len)
- maybe_set_status (urb, -EOVERFLOW);
+ *status = -EOVERFLOW;
else
- maybe_set_status (urb, 0);
+ *status = 0;
} else if (!to_host) {
- maybe_set_status (urb, 0);
+ *status = 0;
if (host_len > dev_len)
req->req.status = -EOVERFLOW;
else
@@ -1125,9 +1119,8 @@ top:
req->req.status = 0;
if (urb->transfer_buffer_length == urb->actual_length
&& !(urb->transfer_flags
- & URB_ZERO_PACKET)) {
- maybe_set_status (urb, 0);
- }
+ & URB_ZERO_PACKET))
+ *status = 0;
}
/* device side completion --> continuable */
@@ -1143,7 +1136,7 @@ top:
}
/* host side completion --> terminate */
- if (urb->status != -EINPROGRESS)
+ if (*status != -EINPROGRESS)
break;
/* rescan to continue with any other queued i/o */
@@ -1254,6 +1247,7 @@ restart:
u8 address;
struct dummy_ep *ep = NULL;
int type;
+ int status = -EINPROGRESS;
urb = urbp->urb;
if (urb->unlinked)
@@ -1279,7 +1273,7 @@ restart:
dev_dbg (dummy_dev(dum),
"no ep configured for urb %p\n",
urb);
- maybe_set_status (urb, -EPROTO);
+ status = -EPROTO;
goto return_urb;
}
@@ -1294,7 +1288,7 @@ restart:
/* NOTE: must not be iso! */
dev_dbg (dummy_dev(dum), "ep %s halted, urb %p\n",
ep->ep.name, urb);
- maybe_set_status (urb, -EPIPE);
+ status = -EPIPE;
goto return_urb;
}
/* FIXME make sure both ends agree on maxpacket */
@@ -1312,7 +1306,7 @@ restart:
w_value = le16_to_cpu(setup.wValue);
if (le16_to_cpu(setup.wLength) !=
urb->transfer_buffer_length) {
- maybe_set_status (urb, -EOVERFLOW);
+ status = -EOVERFLOW;
goto return_urb;
}
@@ -1342,7 +1336,7 @@ restart:
if (setup.bRequestType != Dev_Request)
break;
dum->address = w_value;
- maybe_set_status (urb, 0);
+ status = 0;
dev_dbg (udc_dev(dum), "set_address = %d\n",
w_value);
value = 0;
@@ -1369,7 +1363,7 @@ restart:
if (value == 0) {
dum->devstatus |=
(1 << w_value);
- maybe_set_status (urb, 0);
+ status = 0;
}
} else if (setup.bRequestType == Ep_Request) {
@@ -1381,7 +1375,7 @@ restart:
}
ep2->halted = 1;
value = 0;
- maybe_set_status (urb, 0);
+ status = 0;
}
break;
case USB_REQ_CLEAR_FEATURE:
@@ -1391,7 +1385,7 @@ restart:
dum->devstatus &= ~(1 <<
USB_DEVICE_REMOTE_WAKEUP);
value = 0;
- maybe_set_status (urb, 0);
+ status = 0;
break;
default:
value = -EOPNOTSUPP;
@@ -1406,7 +1400,7 @@ restart:
}
ep2->halted = 0;
value = 0;
- maybe_set_status (urb, 0);
+ status = 0;
}
break;
case USB_REQ_GET_STATUS:
@@ -1443,7 +1437,7 @@ restart:
urb->actual_length = min (2,
urb->transfer_buffer_length);
value = 0;
- maybe_set_status (urb, 0);
+ status = 0;
}
break;
}
@@ -1470,7 +1464,7 @@ restart:
dev_dbg (udc_dev(dum),
"setup --> %d\n",
value);
- maybe_set_status (urb, -EPIPE);
+ status = -EPIPE;
urb->actual_length = 0;
}
@@ -1487,7 +1481,7 @@ restart:
* report random errors, to debug drivers.
*/
limit = max (limit, periodic_bytes (dum, ep));
- maybe_set_status (urb, -ENOSYS);
+ status = -ENOSYS;
break;
case PIPE_INTERRUPT:
@@ -1501,12 +1495,12 @@ restart:
default:
treat_control_like_bulk:
ep->last_io = jiffies;
- total = transfer (dum, urb, ep, limit);
+ total = transfer(dum, urb, ep, limit, &status);
break;
}
/* incomplete transfer? */
- if (urb->status == -EINPROGRESS)
+ if (status == -EINPROGRESS)
continue;
return_urb:
@@ -1517,6 +1511,7 @@ return_urb:
usb_hcd_unlink_urb_from_ep(dummy_to_hcd(dum), urb);
spin_unlock (&dum->lock);
+ urb->status = status;
usb_hcd_giveback_urb (dummy_to_hcd(dum), urb);
spin_lock (&dum->lock);