[PATCH] USB: ERRBUF_LEN compiling error when PAGE_SIZE=64KB on IA64

Randy, thanks for forwarding this to me.

> Johannes,
>
> When I compile base kernel 2.6.1 with PAGE_SIZE=64KB on an IA64
> platform, there is an error.
>   CC      init/version.o
>   LD      init/built-in.o
>   LD      .tmp_vmlinux1
> drivers/built-in.o(.init.text+0x168a2): In function `uhci_hcd_init':
> : undefined reference to `__you_cannot_kmalloc_that_much'
> make: *** [.tmp_vmlinux1] Error 1
>
> That's because ERRBUF_LEN (equal to PAGE_SIZE*8) is too long when
> PAGE_SIZE=64KB. Actually, there was a similar error found by Tony. See
> http://marc.theaimsgroup.com/?l=linux-ia64&m=105604765306485&w=2.
>
> Could you change the definition of ERRBUF_LEN to a fixed value? For
> example, 32*1024?
>
> Yanmin

Yanmin, I'm the new maintainer for the UHCI driver.  Yep, that's a
definite error.  This will fix it.

Also included in this patch: change some confusing references from "high
speed" to "full speed" and add proper hyphenation.

drivers/usb/host/uhci-hcd.c

@@ -81,7 +81,7 @@ static int debug = 0;
 MODULE_PARM(debug, "i");
 MODULE_PARM_DESC(debug, "Debug level");
 static char *errbuf;
-#define ERRBUF_LEN    (PAGE_SIZE * 8)
+#define ERRBUF_LEN    (32 * 1024)
 
 #include "uhci-hub.c"
 #include "uhci-debug.c"
@@ -914,7 +914,7 @@ static int uhci_submit_control(struct uhci_hcd *uhci, struct urb *urb, struct ur
 
 	uhci_insert_tds_in_qh(qh, urb, UHCI_PTR_BREADTH);
 
-	/* Low speed transfers get a different queue, and won't hog the bus */
+	/* Low-speed transfers get a different queue, and won't hog the bus */
 	if (urb->dev->speed == USB_SPEED_LOW)
 		skelqh = uhci->skel_ls_control_qh;
 	else {
@@ -972,7 +972,7 @@ static int usb_control_retrigger_status(struct uhci_hcd *uhci, struct urb *urb)
 	/* One TD, who cares about Breadth first? */
 	uhci_insert_tds_in_qh(urbp->qh, urb, UHCI_PTR_DEPTH);
 
-	/* Low speed transfers get a different queue */
+	/* Low-speed transfers get a different queue */
 	if (urb->dev->speed == USB_SPEED_LOW)
 		uhci_insert_qh(uhci, uhci->skel_ls_control_qh, urb);
 	else
@@ -1256,7 +1256,7 @@ static inline int uhci_submit_bulk(struct uhci_hcd *uhci, struct urb *urb, struc
 {
 	int ret;
 
-	/* Can't have low speed bulk transfers */
+	/* Can't have low-speed bulk transfers */
 	if (urb->dev->speed == USB_SPEED_LOW)
 		return -EINVAL;
 
@@ -2194,10 +2194,10 @@ static int uhci_reset(struct usb_hcd *hcd)
  *    of the queues. We don't do that here, because
  *    we'll create the actual TD entries on demand.
  *  - The first queue is the interrupt queue.
- *  - The second queue is the control queue, split into low and high speed
+ *  - The second queue is the control queue, split into low- and full-speed
  *  - The third queue is bulk queue.
  *  - The fourth queue is the bandwidth reclamation queue, which loops back
- *    to the high speed control queue.
+ *    to the full-speed control queue.
  */
 static int uhci_start(struct usb_hcd *hcd)
 {

drivers/usb/host/uhci-hcd.h

@@ -200,8 +200,8 @@ struct uhci_td {
  * The UHCI driver places Interrupt, Control and Bulk into QH's both
  * to group together TD's for one transfer, and also to faciliate queuing
  * of URB's. To make it easy to insert entries into the schedule, we have
- * a skeleton of QH's for each predefined Interrupt latency, low speed
- * control, high speed control and terminating QH (see explanation for
+ * a skeleton of QH's for each predefined Interrupt latency, low-speed
+ * control, full-speed control and terminating QH (see explanation for
  * the terminating QH below).
  *
  * When we want to add a new QH, we add it to the end of the list for the
@@ -216,9 +216,9 @@ struct uhci_td {
  * skel int32 QH
  * ...
  * skel int1 QH
- * skel low speed control QH
+ * skel low-speed control QH
  * dev 5 control QH
- * skel high speed control QH
+ * skel full-speed control QH
  * skel bulk QH
  * dev 1 bulk QH
  * dev 2 bulk QH
@@ -227,7 +227,7 @@ struct uhci_td {
  * The terminating QH is used for 2 reasons:
  * - To place a terminating TD which is used to workaround a PIIX bug
  *   (see Intel errata for explanation)
- * - To loop back to the high speed control queue for full speed bandwidth
+ * - To loop back to the full-speed control queue for full-speed bandwidth
  *   reclamation
  *
  * Isochronous transfers are stored before the start of the skeleton
@@ -336,7 +336,7 @@ struct uhci_hcd {
 
 	spinlock_t frame_list_lock;
 	struct uhci_frame_list *fl;		/* P: uhci->frame_list_lock */
-	int fsbr;				/* Full speed bandwidth reclamation */
+	int fsbr;				/* Full-speed bandwidth reclamation */
 	unsigned long fsbrtimeout;		/* FSBR delay */
 
 	enum uhci_state state;			/* FIXME: needs a spinlock */