This is a preparation patch for adding support for bulk streams.
Signed-off-by: Hans de Goede <hdego...@redhat.com>
---
drivers/usb/core/devio.c | 18 ++++++++----------
1 file changed, 8 insertions(+), 10 deletions(-)
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index 737e3c1..229f874 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -1175,6 +1175,7 @@ static int proc_do_submiturb(struct dev_state *ps, struct
usbdevfs_urb *uurb,
struct usb_ctrlrequest *dr = NULL;
unsigned int u, totlen, isofrmlen;
int i, ret, is_in, num_sgs = 0, ifnum = -1;
+ int number_of_packets = 0;
void *buf;
if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP |
@@ -1228,7 +1229,6 @@ static int proc_do_submiturb(struct dev_state *ps, struct
usbdevfs_urb *uurb,
le16_to_cpup(&dr->wIndex));
if (ret)
goto error;
- uurb->number_of_packets = 0;
uurb->buffer_length = le16_to_cpup(&dr->wLength);
uurb->buffer += 8;
if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) {
@@ -1256,9 +1256,8 @@ static int proc_do_submiturb(struct dev_state *ps, struct
usbdevfs_urb *uurb,
case USB_ENDPOINT_XFER_INT:
/* allow single-shot interrupt transfers */
uurb->type = USBDEVFS_URB_TYPE_INTERRUPT;
- goto interrupt_urb;
+ break;
}
- uurb->number_of_packets = 0;
num_sgs = DIV_ROUND_UP(uurb->buffer_length, USB_SG_SIZE);
if (num_sgs == 1 || num_sgs > ps->dev->bus->sg_tablesize)
num_sgs = 0;
@@ -1267,8 +1266,6 @@ static int proc_do_submiturb(struct dev_state *ps, struct
usbdevfs_urb *uurb,
case USBDEVFS_URB_TYPE_INTERRUPT:
if (!usb_endpoint_xfer_int(&ep->desc))
return -EINVAL;
- interrupt_urb:
- uurb->number_of_packets = 0;
break;
case USBDEVFS_URB_TYPE_ISO:
@@ -1278,15 +1275,16 @@ static int proc_do_submiturb(struct dev_state *ps,
struct usbdevfs_urb *uurb,
return -EINVAL;
if (!usb_endpoint_xfer_isoc(&ep->desc))
return -EINVAL;
+ number_of_packets = uurb->number_of_packets;
isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) *
- uurb->number_of_packets;
+ number_of_packets;
if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
return -ENOMEM;
if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
ret = -EFAULT;
goto error;
}
- for (totlen = u = 0; u < uurb->number_of_packets; u++) {
+ for (totlen = u = 0; u < number_of_packets; u++) {
/*
* arbitrary limit need for USB 3.0
* bMaxBurst (0~15 allowed, 1~16 packets)
@@ -1317,7 +1315,7 @@ static int proc_do_submiturb(struct dev_state *ps, struct
usbdevfs_urb *uurb,
ret = -EFAULT;
goto error;
}
- as = alloc_async(uurb->number_of_packets);
+ as = alloc_async(number_of_packets);
if (!as) {
ret = -ENOMEM;
goto error;
@@ -1411,7 +1409,7 @@ static int proc_do_submiturb(struct dev_state *ps, struct
usbdevfs_urb *uurb,
as->urb->setup_packet = (unsigned char *)dr;
dr = NULL;
as->urb->start_frame = uurb->start_frame;
- as->urb->number_of_packets = uurb->number_of_packets;
+ as->urb->number_of_packets = number_of_packets;
if (uurb->type == USBDEVFS_URB_TYPE_ISO ||
ps->dev->speed == USB_SPEED_HIGH)
as->urb->interval = 1 << min(15, ep->desc.bInterval - 1);
@@ -1419,7 +1417,7 @@ static int proc_do_submiturb(struct dev_state *ps, struct
usbdevfs_urb *uurb,
as->urb->interval = ep->desc.bInterval;
as->urb->context = as;
as->urb->complete = async_completed;
- for (totlen = u = 0; u < uurb->number_of_packets; u++) {
+ for (totlen = u = 0; u < number_of_packets; u++) {
as->urb->iso_frame_desc[u].offset = totlen;
as->urb->iso_frame_desc[u].length = isopkt[u].length;
totlen += isopkt[u].length;
--
1.8.3.1
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