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-rw-r--r--drivers/usb/core/hcd.c13
-rw-r--r--drivers/usb/core/urb.c65
-rw-r--r--include/linux/usb.h26
3 files changed, 65 insertions, 39 deletions
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 42ef1d5f6c8a..fb82c500caf4 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -962,14 +962,14 @@ int usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags)
spin_lock_irqsave(&hcd_urb_list_lock, flags);
ep = (usb_pipein(urb->pipe) ? urb->dev->ep_in : urb->dev->ep_out)
[usb_pipeendpoint(urb->pipe)];
- if (unlikely (!ep))
+ if (unlikely(ep != urb->ep))
status = -ENOENT;
else if (unlikely (urb->reject))
status = -EPERM;
else switch (hcd->state) {
case HC_STATE_RUNNING:
case HC_STATE_RESUMING:
- list_add_tail (&urb->urb_list, &ep->urb_list);
+ list_add_tail (&urb->urb_list, &urb->ep->urb_list);
status = 0;
break;
default:
@@ -1022,7 +1022,7 @@ int usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags)
: DMA_TO_DEVICE);
}
- status = hcd->driver->urb_enqueue (hcd, ep, urb, mem_flags);
+ status = hcd->driver->urb_enqueue (hcd, urb->ep, urb, mem_flags);
done:
if (unlikely (status)) {
urb_unlink(hcd, urb);
@@ -1071,7 +1071,6 @@ unlink1 (struct usb_hcd *hcd, struct urb *urb)
*/
int usb_hcd_unlink_urb (struct urb *urb, int status)
{
- struct usb_host_endpoint *ep;
struct usb_hcd *hcd = NULL;
struct device *sys = NULL;
unsigned long flags;
@@ -1082,10 +1081,6 @@ int usb_hcd_unlink_urb (struct urb *urb, int status)
return -EINVAL;
if (!urb->dev || !urb->dev->bus)
return -ENODEV;
- ep = (usb_pipein(urb->pipe) ? urb->dev->ep_in : urb->dev->ep_out)
- [usb_pipeendpoint(urb->pipe)];
- if (!ep)
- return -ENODEV;
/*
* we contend for urb->status with the hcd core,
@@ -1109,7 +1104,7 @@ int usb_hcd_unlink_urb (struct urb *urb, int status)
}
/* insist the urb is still queued */
- list_for_each(tmp, &ep->urb_list) {
+ list_for_each(tmp, &urb->ep->urb_list) {
if (tmp == &urb->urb_list)
break;
}
diff --git a/drivers/usb/core/urb.c b/drivers/usb/core/urb.c
index be630228461c..ff53acb4fab2 100644
--- a/drivers/usb/core/urb.c
+++ b/drivers/usb/core/urb.c
@@ -277,9 +277,10 @@ EXPORT_SYMBOL_GPL(usb_unanchor_urb);
*/
int usb_submit_urb(struct urb *urb, gfp_t mem_flags)
{
- int pipe, temp, max;
- struct usb_device *dev;
- int is_out;
+ int xfertype, max;
+ struct usb_device *dev;
+ struct usb_host_endpoint *ep;
+ int is_out;
if (!urb || urb->hcpriv || !urb->complete)
return -EINVAL;
@@ -291,30 +292,34 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags)
|| dev->state == USB_STATE_SUSPENDED)
return -EHOSTUNREACH;
+ /* For now, get the endpoint from the pipe. Eventually drivers
+ * will be required to set urb->ep directly and we will eliminate
+ * urb->pipe.
+ */
+ ep = (usb_pipein(urb->pipe) ? dev->ep_in : dev->ep_out)
+ [usb_pipeendpoint(urb->pipe)];
+ if (!ep)
+ return -ENOENT;
+
+ urb->ep = ep;
urb->status = -EINPROGRESS;
urb->actual_length = 0;
/* Lots of sanity checks, so HCDs can rely on clean data
* and don't need to duplicate tests
*/
- pipe = urb->pipe;
- temp = usb_pipetype(pipe);
- is_out = usb_pipeout(pipe);
+ xfertype = usb_endpoint_type(&ep->desc);
+ is_out = usb_pipeout(urb->pipe);
- if (!usb_pipecontrol(pipe) && dev->state < USB_STATE_CONFIGURED)
+ if (xfertype != USB_ENDPOINT_XFER_CONTROL &&
+ dev->state < USB_STATE_CONFIGURED)
return -ENODEV;
- /* FIXME there should be a sharable lock protecting us against
- * config/altsetting changes and disconnects, kicking in here.
- * (here == before maxpacket, and eventually endpoint type,
- * checks get made.)
- */
-
- max = usb_maxpacket(dev, pipe, is_out);
+ max = le16_to_cpu(ep->desc.wMaxPacketSize);
if (max <= 0) {
dev_dbg(&dev->dev,
"bogus endpoint ep%d%s in %s (bad maxpacket %d)\n",
- usb_pipeendpoint(pipe), is_out ? "out" : "in",
+ usb_endpoint_num(&ep->desc), is_out ? "out" : "in",
__FUNCTION__, max);
return -EMSGSIZE;
}
@@ -323,7 +328,7 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags)
* but drivers only control those sizes for ISO.
* while we're checking, initialize return status.
*/
- if (temp == PIPE_ISOCHRONOUS) {
+ if (xfertype == USB_ENDPOINT_XFER_ISOC) {
int n, len;
/* "high bandwidth" mode, 1-3 packets/uframe? */
@@ -359,19 +364,19 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags)
/* enforce simple/standard policy */
allowed = (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP |
URB_NO_INTERRUPT);
- switch (temp) {
- case PIPE_BULK:
+ switch (xfertype) {
+ case USB_ENDPOINT_XFER_BULK:
if (is_out)
allowed |= URB_ZERO_PACKET;
/* FALLTHROUGH */
- case PIPE_CONTROL:
+ case USB_ENDPOINT_XFER_CONTROL:
allowed |= URB_NO_FSBR; /* only affects UHCI */
/* FALLTHROUGH */
default: /* all non-iso endpoints */
if (!is_out)
allowed |= URB_SHORT_NOT_OK;
break;
- case PIPE_ISOCHRONOUS:
+ case USB_ENDPOINT_XFER_ISOC:
allowed |= URB_ISO_ASAP;
break;
}
@@ -393,9 +398,9 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags)
* supports different values... this uses EHCI/UHCI defaults (and
* EHCI can use smaller non-default values).
*/
- switch (temp) {
- case PIPE_ISOCHRONOUS:
- case PIPE_INTERRUPT:
+ switch (xfertype) {
+ case USB_ENDPOINT_XFER_ISOC:
+ case USB_ENDPOINT_XFER_INT:
/* too small? */
if (urb->interval <= 0)
return -EINVAL;
@@ -405,29 +410,29 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags)
// NOTE usb handles 2^15
if (urb->interval > (1024 * 8))
urb->interval = 1024 * 8;
- temp = 1024 * 8;
+ max = 1024 * 8;
break;
case USB_SPEED_FULL: /* units are frames/msec */
case USB_SPEED_LOW:
- if (temp == PIPE_INTERRUPT) {
+ if (xfertype == USB_ENDPOINT_XFER_INT) {
if (urb->interval > 255)
return -EINVAL;
// NOTE ohci only handles up to 32
- temp = 128;
+ max = 128;
} else {
if (urb->interval > 1024)
urb->interval = 1024;
// NOTE usb and ohci handle up to 2^15
- temp = 1024;
+ max = 1024;
}
break;
default:
return -EINVAL;
}
/* power of two? */
- while (temp > urb->interval)
- temp >>= 1;
- urb->interval = temp;
+ while (max > urb->interval)
+ max >>= 1;
+ urb->interval = max;
}
return usb_hcd_submit_urb(urb, mem_flags);
diff --git a/include/linux/usb.h b/include/linux/usb.h
index 4f33a58fa9d1..105e3e9362d0 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -555,6 +555,29 @@ static inline int usb_make_path (struct usb_device *dev, char *buf,
/*-------------------------------------------------------------------------*/
/**
+ * usb_endpoint_num - get the endpoint's number
+ * @epd: endpoint to be checked
+ *
+ * Returns @epd's number: 0 to 15.
+ */
+static inline int usb_endpoint_num(const struct usb_endpoint_descriptor *epd)
+{
+ return epd->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
+}
+
+/**
+ * usb_endpoint_type - get the endpoint's transfer type
+ * @epd: endpoint to be checked
+ *
+ * Returns one of USB_ENDPOINT_XFER_{CONTROL, ISOC, BULK, INT} according
+ * to @epd's transfer type.
+ */
+static inline int usb_endpoint_type(const struct usb_endpoint_descriptor *epd)
+{
+ return epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
+}
+
+/**
* usb_endpoint_dir_in - check if the endpoint has IN direction
* @epd: endpoint to be checked
*
@@ -1037,6 +1060,8 @@ typedef void (*usb_complete_t)(struct urb *);
* @urb_list: For use by current owner of the URB.
* @anchor_list: membership in the list of an anchor
* @anchor: to anchor URBs to a common mooring
+ * @ep: Points to the endpoint's data structure. Will eventually
+ * replace @pipe.
* @pipe: Holds endpoint number, direction, type, and more.
* Create these values with the eight macros available;
* usb_{snd,rcv}TYPEpipe(dev,endpoint), where the TYPE is "ctrl"
@@ -1212,6 +1237,7 @@ struct urb
struct list_head anchor_list; /* the URB may be anchored by the driver */
struct usb_anchor *anchor;
struct usb_device *dev; /* (in) pointer to associated device */
+ struct usb_host_endpoint *ep; /* (internal) pointer to endpoint struct */
unsigned int pipe; /* (in) pipe information */
int status; /* (return) non-ISO status */
unsigned int transfer_flags; /* (in) URB_SHORT_NOT_OK | ...*/
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.