This converts all of the input USB drivers to manage DMA

buffers via usb_buffer_alloc in 2.5.x  This helps platforms
where doing a pci_{map,unmap}_single() on every input event
is very inefficient.

Also adds a missing kfree(hid), because the HID struct was never
freed.

drivers/usb/input/aiptek.c

@@ -113,13 +113,15 @@ struct aiptek_features {
 };
 
 struct aiptek {
-	signed char data[10];
 	struct input_dev dev;
 	struct usb_device *usbdev;
 	struct urb *irq;
 	struct aiptek_features *features;
 	int tool;
 	int open;
+
+	signed char *data;
+	dma_addr_t data_dma;
 };
 
 static void
@@ -235,11 +237,18 @@ aiptek_probe(struct usb_device *dev, unsigned int ifnum,
 
 	memset(aiptek, 0, sizeof (struct aiptek));
 
-    aiptek->irq = usb_alloc_urb(0, GFP_KERNEL);
-    if (!aiptek->irq) {
-        kfree(aiptek);
-        return NULL;
-    }
+	aiptek->data = usb_buffer_alloc(dev, 10, SLAB_ATOMIC, &aiptek->data_dma);
+	if (!aiptek->data) {
+		kfree(aiptek);
+		return NULL;
+	}
+
+	aiptek->irq = usb_alloc_urb(0, GFP_KERNEL);
+	if (!aiptek->irq) {
+		usb_buffer_free(dev, 10, aiptek->data, aiptek->data_dma);
+		kfree(aiptek);
+		return NULL;
+	}
 
 	// Resolution500LPI
 	aiptek_command(dev, ifnum, 0x18, 0x04);
@@ -287,14 +296,15 @@ aiptek_probe(struct usb_device *dev, unsigned int ifnum,
 
 	endpoint = dev->config[0].interface[ifnum].altsetting[0].endpoint + 0;
 
-	FILL_INT_URB(aiptek->irq,
-		  dev,
-		  usb_rcvintpipe(dev, endpoint->bEndpointAddress),
-		         aiptek->data,
-		  aiptek->features->pktlen,
-		         aiptek->features->irq,
-		  aiptek,
-		  endpoint->bInterval);
+	if (aiptek->features->pktlen > 10)
+		BUG();
+
+	usb_fill_int_urb(aiptek->irq, dev,
+			 usb_rcvintpipe(dev, endpoint->bEndpointAddress),
+			 aiptek->data, aiptek->features->pktlen,
+			 aiptek->features->irq, aiptek, endpoint->bInterval);
+	aiptek->irq->transfer_dma = aiptek->data_dma;
+	aiptek->irq->transfer_flags |= URB_NO_DMA_MAP;
 
 	input_register_device(&aiptek->dev);
 
@@ -310,7 +320,8 @@ aiptek_disconnect(struct usb_device *dev, void *ptr)
 	struct aiptek *aiptek = ptr;
 	usb_unlink_urb(aiptek->irq);
 	input_unregister_device(&aiptek->dev);
-    usb_free_urb(aiptek->irq);
+	usb_free_urb(aiptek->irq);
+	usb_buffer_free(dev, 10, aiptek->data, aiptek->data_dma);
 	kfree(aiptek);
 }
 

drivers/usb/input/hid-core.c

 /*
- * $Id: hid-core.c,v 1.6 2002/06/09 17:34:55 jdeneux Exp $
+ *  USB HID support for Linux
  *
  *  Copyright (c) 1999 Andreas Gal
- *  Copyright (c) 2000-2001 Vojtech Pavlik
- *
- *  USB HID support for Linux
+ *  Copyright (c) 2000-2001 Vojtech Pavlik <vojtech@suse.cz>
  */
 
 /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- * Should you need to contact me, the author, you can do so either by
- * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
- * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
  */
 
 #include <linux/module.h>
@@ -52,8 +37,8 @@
  * Version Information
  */
 
-#define DRIVER_VERSION "v1.31"
-#define DRIVER_AUTHOR "Andreas Gal, Vojtech Pavlik <vojtech@ucw.cz>"
+#define DRIVER_VERSION "v2.0"
+#define DRIVER_AUTHOR "Andreas Gal, Vojtech Pavlik"
 #define DRIVER_DESC "USB HID core driver"
 #define DRIVER_LICENSE "GPL"
 
@@ -559,6 +544,7 @@ static void hid_free_device(struct hid_device *device)
 	}
 
 	if (device->rdesc) kfree(device->rdesc);
+	kfree(device);
 }
 
 /*
@@ -651,9 +637,8 @@ static struct hid_device *hid_parse_report(__u8 *start, unsigned size)
 		return NULL;
 	memset(device, 0, sizeof(struct hid_device));
 
-	if (!(device->collection = kmalloc(sizeof(struct hid_collection) *
-					   HID_DEFAULT_NUM_COLLECTIONS,
-					   GFP_KERNEL))) {
+	if (!(device->collection =kmalloc(sizeof(struct hid_collection) *
+				   HID_DEFAULT_NUM_COLLECTIONS, GFP_KERNEL))) {
 		kfree(device);
 		return NULL;
 	}
@@ -1071,11 +1056,11 @@ static int hid_submit_ctrl(struct hid_device *hid)
 	hid->urbctrl->pipe = (dir == USB_DIR_OUT) ?  usb_sndctrlpipe(hid->dev, 0) : usb_rcvctrlpipe(hid->dev, 0);
 	hid->urbctrl->dev = hid->dev;
 
-	hid->cr.bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir;
-	hid->cr.bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT : HID_REQ_GET_REPORT;
-	hid->cr.wValue = cpu_to_le16(((report->type + 1) << 8) | report->id);
-	hid->cr.wIndex = cpu_to_le16(hid->ifnum);
-	hid->cr.wLength = cpu_to_le16(hid->urbctrl->transfer_buffer_length);
+	hid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir;
+	hid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT : HID_REQ_GET_REPORT;
+	hid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) | report->id);
+	hid->cr->wIndex = cpu_to_le16(hid->ifnum);
+	hid->cr->wLength = cpu_to_le16(hid->urbctrl->transfer_buffer_length);
 
 	dbg("submitting ctrl urb");
 
@@ -1338,6 +1323,32 @@ struct hid_blacklist {
 	{ 0, 0 }
 };
 
+static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
+{
+	if (!(hid->inbuf = usb_buffer_alloc(dev, HID_BUFFER_SIZE, SLAB_ATOMIC, &hid->inbuf_dma)))
+		return -1;
+	if (!(hid->outbuf = usb_buffer_alloc(dev, HID_BUFFER_SIZE, SLAB_ATOMIC, &hid->outbuf_dma)))
+		return -1;
+	if (!(hid->cr = usb_buffer_alloc(dev, sizeof(*(hid->cr)), SLAB_ATOMIC, &hid->cr_dma)))
+		return -1;
+	if (!(hid->ctrlbuf = usb_buffer_alloc(dev, HID_BUFFER_SIZE, SLAB_ATOMIC, &hid->ctrlbuf_dma)))
+		return -1;
+
+	return 0;
+}
+
+static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
+{
+	if (hid->inbuf)
+		usb_buffer_free(dev, HID_BUFFER_SIZE, hid->inbuf, hid->inbuf_dma);
+	if (hid->outbuf)
+		usb_buffer_free(dev, HID_BUFFER_SIZE, hid->outbuf, hid->outbuf_dma);
+	if (hid->cr)
+		usb_buffer_free(dev, sizeof(*(hid->cr)), hid->cr, hid->cr_dma);
+	if (hid->ctrlbuf)
+		usb_buffer_free(dev, HID_BUFFER_SIZE, hid->ctrlbuf, hid->ctrlbuf_dma);
+}
+
 static struct hid_device *usb_hid_configure(struct usb_device *dev, int ifnum)
 {
 	struct usb_interface_descriptor *interface = dev->actconfig->interface[ifnum].altsetting + 0;
@@ -1397,6 +1408,11 @@ static struct hid_device *usb_hid_configure(struct usb_device *dev, int ifnum)
 	kfree(rdesc);
 	hid->quirks = quirks;
 
+	if (hid_alloc_buffers(dev, hid)) {
+		hid_free_buffers(dev, hid);
+		goto fail;
+	}
+
 	for (n = 0; n < interface->bNumEndpoints; n++) {
 
 		struct usb_endpoint_descriptor *endpoint = &interface->endpoint[n];
@@ -1411,14 +1427,20 @@ static struct hid_device *usb_hid_configure(struct usb_device *dev, int ifnum)
 			if (!(hid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
 				goto fail;
 			pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
-			FILL_INT_URB(hid->urbin, dev, pipe, hid->inbuf, 0, hid_irq_in, hid, endpoint->bInterval);
+			usb_fill_int_urb(hid->urbin, dev, pipe, hid->inbuf, 0,
+					 hid_irq_in, hid, endpoint->bInterval);
+			hid->urbin->transfer_dma = hid->inbuf_dma;
+			hid->urbin->transfer_flags |= URB_NO_DMA_MAP;
 		} else {
 			if (hid->urbout)
 				continue;
 			if (!(hid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
 				goto fail;
 			pipe = usb_sndbulkpipe(dev, endpoint->bEndpointAddress);
-			FILL_BULK_URB(hid->urbout, dev, pipe, hid->outbuf, 0, hid_irq_out, hid);
+			usb_fill_bulk_urb(hid->urbout, dev, pipe, hid->outbuf, 0,
+					  hid_irq_out, hid);
+			hid->urbout->transfer_dma = hid->outbuf_dma;
+			hid->urbout->transfer_flags |= URB_NO_DMA_MAP;
 		}
 	}
 
@@ -1458,16 +1480,21 @@ static struct hid_device *usb_hid_configure(struct usb_device *dev, int ifnum)
 	kfree(buf);
 
 	hid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
-	FILL_CONTROL_URB(hid->urbctrl, dev, 0, (void*) &hid->cr, hid->ctrlbuf, 1, hid_ctrl, hid);
+	usb_fill_control_urb(hid->urbctrl, dev, 0, (void *) hid->cr,
+			     hid->ctrlbuf, 1, hid_ctrl, hid);
+	hid->urbctrl->setup_dma = hid->cr_dma;
+	hid->urbctrl->transfer_dma = hid->ctrlbuf_dma;
+	hid->urbctrl->transfer_flags |= URB_NO_DMA_MAP;
 
 	return hid;
 
 fail:
 
-	hid_free_device(hid);
 	if (hid->urbin) usb_free_urb(hid->urbin);
 	if (hid->urbout) usb_free_urb(hid->urbout);
 	if (hid->urbctrl) usb_free_urb(hid->urbctrl);
+	hid_free_buffers(dev, hid);
+	hid_free_device(hid);
 
 	return NULL;
 }
@@ -1490,6 +1517,7 @@ static void hid_disconnect(struct usb_device *dev, void *ptr)
 	if (hid->urbout)
 		usb_free_urb(hid->urbout);
 
+	hid_free_buffers(dev, hid);
 	hid_free_device(hid);
 }
 

drivers/usb/input/hid.h

@@ -337,19 +337,23 @@ struct hid_device {							/* device report descriptor */
 	unsigned long iofl;						/* I/O flags (CTRL_RUNNING, OUT_RUNNING) */
 
 	struct urb *urbin;						/* Input URB */
-	char inbuf[HID_BUFFER_SIZE];					/* Input buffer */
+	char *inbuf;							/* Input buffer */
+	dma_addr_t inbuf_dma;						/* Input buffer dma */
 
 	struct urb *urbctrl;						/* Control URB */
-	struct usb_ctrlrequest cr;					/* Control request struct */
+	struct usb_ctrlrequest *cr;					/* Control request struct */
+	dma_addr_t cr_dma;						/* Control request struct dma */
 	struct hid_control_fifo ctrl[HID_CONTROL_FIFO_SIZE];		/* Control fifo */
 	unsigned char ctrlhead, ctrltail;				/* Control fifo head & tail */
-	char ctrlbuf[HID_BUFFER_SIZE];					/* Control buffer */
+	char *ctrlbuf;							/* Control buffer */
+	dma_addr_t ctrlbuf_dma;						/* Control buffer dma */
 	spinlock_t ctrllock;						/* Control fifo spinlock */
 
 	struct urb *urbout;						/* Output URB */
 	struct hid_report *out[HID_CONTROL_FIFO_SIZE];			/* Output pipe fifo */
 	unsigned char outhead, outtail;					/* Output pipe fifo head & tail */
-	char outbuf[HID_BUFFER_SIZE];					/* Output buffer */
+	char *outbuf;							/* Output buffer */
+	dma_addr_t outbuf_dma;						/* Output buffer dma */
 	spinlock_t outlock;						/* Output fifo spinlock */
 
 	unsigned claimed;						/* Claimed by hidinput, hiddev? */	

drivers/usb/input/powermate.c

@@ -52,9 +52,11 @@
 
 #define POWERMATE_PAYLOAD_SIZE 3
 struct powermate_device {
-	signed char data[POWERMATE_PAYLOAD_SIZE];
-	struct urb irq, config;
-	struct usb_ctrlrequest configcr;
+	signed char *data;
+	dma_addr_t data_dma;
+	struct urb *irq, *config;
+	struct usb_ctrlrequest *configcr;
+	dma_addr_t configcr_dma;
 	struct usb_device *udev;
 	struct input_dev input;
 	struct semaphore lock;
@@ -77,7 +79,7 @@ static void powermate_irq(struct urb *urb)
 {
 	struct powermate_device *pm = urb->context;
 
-	if(urb->status)
+	if (urb->status)
 		return;
 
 	/* handle updates to device state */
@@ -89,24 +91,24 @@ static void powermate_irq(struct urb *urb)
 /* Decide if we need to issue a control message and do so. Must be called with pm->lock down */
 static void powermate_sync_state(struct powermate_device *pm)
 {
-	if(pm->requires_update == 0) 
+	if (pm->requires_update == 0) 
 		return; /* no updates are required */
-	if(pm->config.status == -EINPROGRESS) 
+	if (pm->config->status == -EINPROGRESS) 
 		return; /* an update is already in progress; it'll issue this update when it completes */
 
-	if(pm->requires_update & UPDATE_STATIC_BRIGHTNESS){
-		pm->configcr.wValue = cpu_to_le16( SET_STATIC_BRIGHTNESS );
-		pm->configcr.wIndex = cpu_to_le16( pm->static_brightness );
+	if (pm->requires_update & UPDATE_STATIC_BRIGHTNESS){
+		pm->configcr->wValue = cpu_to_le16( SET_STATIC_BRIGHTNESS );
+		pm->configcr->wIndex = cpu_to_le16( pm->static_brightness );
 		pm->requires_update &= ~UPDATE_STATIC_BRIGHTNESS;
-	}else if(pm->requires_update & UPDATE_PULSE_ASLEEP){
-		pm->configcr.wValue = cpu_to_le16( SET_PULSE_ASLEEP );
-		pm->configcr.wIndex = cpu_to_le16( pm->pulse_asleep ? 1 : 0 );
+	}else if (pm->requires_update & UPDATE_PULSE_ASLEEP){
+		pm->configcr->wValue = cpu_to_le16( SET_PULSE_ASLEEP );
+		pm->configcr->wIndex = cpu_to_le16( pm->pulse_asleep ? 1 : 0 );
 		pm->requires_update &= ~UPDATE_PULSE_ASLEEP;
-	}else if(pm->requires_update & UPDATE_PULSE_AWAKE){
-		pm->configcr.wValue = cpu_to_le16( SET_PULSE_AWAKE );
-		pm->configcr.wIndex = cpu_to_le16( pm->pulse_awake ? 1 : 0 );
+	}else if (pm->requires_update & UPDATE_PULSE_AWAKE){
+		pm->configcr->wValue = cpu_to_le16( SET_PULSE_AWAKE );
+		pm->configcr->wIndex = cpu_to_le16( pm->pulse_awake ? 1 : 0 );
 		pm->requires_update &= ~UPDATE_PULSE_AWAKE;
-	}else if(pm->requires_update & UPDATE_PULSE_MODE){
+	}else if (pm->requires_update & UPDATE_PULSE_MODE){
 		int op, arg;
 		/* the powermate takes an operation and an argument for its pulse algorithm.
 		   the operation can be:
@@ -125,18 +127,18 @@ static void powermate_sync_state(struct powermate_device *pm)
 
 		   Only values of 'arg' quite close to 255 are particularly useful/spectacular.
 		*/    
-		if(pm->pulse_speed < 255){
+		if (pm->pulse_speed < 255){
 			op = 0;                   // divide
 			arg = 255 - pm->pulse_speed;
-		}else if(pm->pulse_speed > 255){
+		} else if (pm->pulse_speed > 255){
 			op = 2;                   // multiply
 			arg = pm->pulse_speed - 255;
-		}else{
+		} else {
 			op = 1;                   // normal speed
 			arg = 0;                  // can be any value
 		}
-		pm->configcr.wValue = cpu_to_le16( (pm->pulse_table << 8) | SET_PULSE_MODE );
-		pm->configcr.wIndex = cpu_to_le16( (arg << 8) | op );
+		pm->configcr->wValue = cpu_to_le16( (pm->pulse_table << 8) | SET_PULSE_MODE );
+		pm->configcr->wIndex = cpu_to_le16( (arg << 8) | op );
 		pm->requires_update &= ~UPDATE_PULSE_MODE;
 	}else{
 		printk(KERN_ERR "powermate: unknown update required");
@@ -144,17 +146,19 @@ static void powermate_sync_state(struct powermate_device *pm)
 		return;
 	}
 
-/*	printk("powermate: %04x %04x\n", pm->configcr.wValue, pm->configcr.wIndex); */
+/*	printk("powermate: %04x %04x\n", pm->configcr->wValue, pm->configcr->wIndex); */
 
-	pm->config.dev = pm->udev; /* is this necessary? */
-	pm->configcr.bRequestType = 0x41; /* vendor request */
-	pm->configcr.bRequest = 0x01;
-	pm->configcr.wLength = 0;
+	pm->configcr->bRequestType = 0x41; /* vendor request */
+	pm->configcr->bRequest = 0x01;
+	pm->configcr->wLength = 0;
 
-        FILL_CONTROL_URB(&pm->config, pm->udev, usb_sndctrlpipe(pm->udev, 0), 
-			 (void*)&pm->configcr, 0, 0, powermate_config_complete, pm);	
+	usb_fill_control_urb(pm->config, pm->udev, usb_sndctrlpipe(pm->udev, 0),
+			     (void *) pm->configcr, 0, 0,
+			     powermate_config_complete, pm);
+	pm->config->setup_dma = pm->configcr_dma;
+	pm->config->transfer_flags |= URB_NO_DMA_MAP;
 
-	if(usb_submit_urb(&pm->config, GFP_ATOMIC))
+	if (usb_submit_urb(pm->config, GFP_ATOMIC))
 		printk(KERN_ERR "powermate: usb_submit_urb(config) failed");
 }
 
@@ -163,7 +167,7 @@ static void powermate_config_complete(struct urb *urb)
 {
 	struct powermate_device *pm = urb->context;
 
-	if(urb->status)
+	if (urb->status)
 		printk(KERN_ERR "powermate: config urb returned %d\n", urb->status);
 	
 	down(&pm->lock);
@@ -175,13 +179,13 @@ static void powermate_config_complete(struct urb *urb)
 static void powermate_pulse_led(struct powermate_device *pm, int static_brightness, int pulse_speed, 
 				int pulse_table, int pulse_asleep, int pulse_awake)
 {
-	if(pulse_speed < 0)
+	if (pulse_speed < 0)
 		pulse_speed = 0;
-	if(pulse_table < 0)
+	if (pulse_table < 0)
 		pulse_table = 0;
-	if(pulse_speed > 510)
+	if (pulse_speed > 510)
 		pulse_speed = 510;
-	if(pulse_table > 2)
+	if (pulse_table > 2)
 		pulse_table = 2;
 
 	pulse_asleep = !!pulse_asleep;
@@ -190,19 +194,19 @@ static void powermate_pulse_led(struct powermate_device *pm, int static_brightne
 	down(&pm->lock);
 
 	/* mark state updates which are required */
-	if(static_brightness != pm->static_brightness){
+	if (static_brightness != pm->static_brightness){
 		pm->static_brightness = static_brightness;
 		pm->requires_update |= UPDATE_STATIC_BRIGHTNESS;		
 	}
-	if(pulse_asleep != pm->pulse_asleep){
+	if (pulse_asleep != pm->pulse_asleep){
 		pm->pulse_asleep = pulse_asleep;
 		pm->requires_update |= UPDATE_PULSE_ASLEEP;
 	}
-	if(pulse_awake != pm->pulse_awake){
+	if (pulse_awake != pm->pulse_awake){
 		pm->pulse_awake = pulse_awake;
 		pm->requires_update |= UPDATE_PULSE_AWAKE;
 	}
-	if(pulse_speed != pm->pulse_speed || pulse_table != pm->pulse_table){
+	if (pulse_speed != pm->pulse_speed || pulse_table != pm->pulse_table){
 		pm->pulse_speed = pulse_speed;
 		pm->pulse_table = pulse_table;
 		pm->requires_update |= UPDATE_PULSE_MODE;
@@ -219,7 +223,7 @@ static int powermate_input_event(struct input_dev *dev, unsigned int type, unsig
 	unsigned int command = (unsigned int)_value;
 	struct powermate_device *pm = dev->private;
 
-	if(type == EV_MSC && code == MSC_PULSELED){
+	if (type == EV_MSC && code == MSC_PULSELED){
 		/*  
 		    bits  0- 7: 8 bits: LED brightness
 		    bits  8-16: 9 bits: pulsing speed modifier (0 ... 510); 0-254 = slower, 255 = standard, 256-510 = faster.
@@ -239,6 +243,30 @@ static int powermate_input_event(struct input_dev *dev, unsigned int type, unsig
 	return 0;
 }
 
+static int powermate_alloc_buffers(struct usb_device *udev, struct powermate_device *pm)
+{
+	pm->data = usb_buffer_alloc(udev, POWERMATE_PAYLOAD_SIZE,
+				    SLAB_ATOMIC, &pm->data_dma);
+	if (!pm->data)
+		return -1;
+	pm->configcr = usb_buffer_alloc(udev, sizeof(*(pm->configcr)),
+					SLAB_ATOMIC, &pm->configcr_dma);
+	if (!pm->configcr)
+		return -1;
+
+	return 0;
+}
+
+static void powermate_free_buffers(struct usb_device *udev, struct powermate_device *pm)
+{
+	if (pm->data)
+		usb_buffer_free(udev, POWERMATE_PAYLOAD_SIZE,
+				pm->data, pm->data_dma);
+	if (pm->configcr)
+		usb_buffer_free(udev, sizeof(*(pm->configcr)),
+				pm->configcr, pm->configcr_dma);
+}
+
 /* Called whenever a USB device matching one in our supported devices table is connected */
 static void *powermate_probe(struct usb_device *udev, unsigned int ifnum, const struct usb_device_id *id)
 {
@@ -264,19 +292,46 @@ static void *powermate_probe(struct usb_device *udev, unsigned int ifnum, const
 	memset(pm, 0, sizeof(struct powermate_device));
 	pm->udev = udev;
 
+	if (powermate_alloc_buffers(udev, pm)) {
+		powermate_free_buffers(udev, pm);
+		kfree(pm);
+		return NULL;
+	}
+
+	pm->irq = usb_alloc_urb(0, GFP_KERNEL);
+	if (!pm->irq) {
+		powermate_free_buffers(udev, pm);
+		kfree(pm);
+		return NULL;
+	}
+
+	pm->config = usb_alloc_urb(0, GFP_KERNEL);
+	if (!pm->config) {
+		usb_free_urb(pm->irq);
+		powermate_free_buffers(udev, pm);
+		kfree(pm);
+		return NULL;
+	}
+
 	init_MUTEX(&pm->lock);
 
 	/* get a handle to the interrupt data pipe */
 	pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress);
 	maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
 
-	if(maxp != POWERMATE_PAYLOAD_SIZE)
+	if (maxp != POWERMATE_PAYLOAD_SIZE)
 		printk("powermate: Expected payload of %d bytes, found %d bytes!\n", POWERMATE_PAYLOAD_SIZE, maxp);
 
-	FILL_INT_URB(&pm->irq, udev, pipe, pm->data, POWERMATE_PAYLOAD_SIZE, powermate_irq, pm, endpoint->bInterval);
+
+	usb_fill_int_urb(pm->irq, udev, pipe, pm->data,
+			 POWERMATE_PAYLOAD_SIZE, powermate_irq,
+			 pm, endpoint->bInterval);
+	pm->irq->transfer_dma = pm->data_dma;
+	pm->irq->transfer_flags |= URB_NO_DMA_MAP;
 
 	/* register our interrupt URB with the USB system */
-	if(usb_submit_urb(&pm->irq, GFP_KERNEL)) {
+	if (usb_submit_urb(pm->irq, GFP_KERNEL)) {
+		powermate_free_buffers(udev, pm);
 		kfree(pm);
 		return NULL; /* failure */
 	}
@@ -319,8 +374,11 @@ static void powermate_disconnect(struct usb_device *dev, void *ptr)
 	struct powermate_device *pm = ptr;
 	down(&pm->lock);
 	pm->requires_update = 0;
-	usb_unlink_urb(&pm->irq);  
+	usb_unlink_urb(pm->irq);
 	input_unregister_device(&pm->input);
+	usb_free_urb(pm->irq);
+	usb_free_urb(pm->config);
+	powermate_free_buffers(dev, pm);
   
 	kfree(pm);
 }

drivers/usb/input/usbkbd.c

@@ -67,14 +67,19 @@ static unsigned char usb_kbd_keycode[256] = {
 struct usb_kbd {
 	struct input_dev dev;
 	struct usb_device *usbdev;
-	unsigned char new[8];
 	unsigned char old[8];
 	struct urb *irq, *led;
-	struct usb_ctrlrequest cr;
-	unsigned char leds, newleds;
+	unsigned char newleds;
 	char name[128];
 	char phys[64];
 	int open;
+
+	unsigned char *new;
+	struct usb_ctrlrequest *cr;
+	unsigned char *leds;
+	dma_addr_t cr_dma;
+	dma_addr_t new_dma;
+	dma_addr_t leds_dma;
 };
 
 static void usb_kbd_irq(struct urb *urb)
@@ -123,10 +128,10 @@ int usb_kbd_event(struct input_dev *dev, unsigned int type, unsigned int code, i
 	if (kbd->led->status == -EINPROGRESS)
 		return 0;
 
-	if (kbd->leds == kbd->newleds)
+	if (*(kbd->leds) == kbd->newleds)
 		return 0;
 
-	kbd->leds = kbd->newleds;
+	*(kbd->leds) = kbd->newleds;
 	kbd->led->dev = kbd->usbdev;
 	if (usb_submit_urb(kbd->led, GFP_ATOMIC))
 		err("usb_submit_urb(leds) failed");
@@ -141,10 +146,10 @@ static void usb_kbd_led(struct urb *urb)
 	if (urb->status)
 		warn("led urb status %d received", urb->status);
 	
-	if (kbd->leds == kbd->newleds)
+	if (*(kbd->leds) == kbd->newleds)
 		return;
 
-	kbd->leds = kbd->newleds;
+	*(kbd->leds) = kbd->newleds;
 	kbd->led->dev = kbd->usbdev;
 	if (usb_submit_urb(kbd->led, GFP_ATOMIC))
 		err("usb_submit_urb(leds) failed");
@@ -172,6 +177,36 @@ static void usb_kbd_close(struct input_dev *dev)
 		usb_unlink_urb(kbd->irq);
 }
 
+static int usb_kbd_alloc_mem(struct usb_device *dev, struct usb_kbd *kbd)
+{
+	if (!(kbd->irq = usb_alloc_urb(0, GFP_KERNEL)))
+		return -1;
+	if (!(kbd->led = usb_alloc_urb(0, GFP_KERNEL)))
+		return -1;
+	if (!(kbd->new = usb_buffer_alloc(dev, 8, SLAB_ATOMIC, &kbd->new_dma)))
+		return -1;
+	if (!(kbd->cr = usb_buffer_alloc(dev, sizeof(struct usb_ctrlrequest), SLAB_ATOMIC, &kbd->cr_dma)))
+		return -1;
+	if (!(kbd->leds = usb_buffer_alloc(dev, 1, SLAB_ATOMIC, &kbd->leds_dma)))
+		return -1;
+
+	return 0;
+}
+
+static void usb_kbd_free_mem(struct usb_device *dev, struct usb_kbd *kbd)
+{
+	if (kbd->irq)
+		usb_free_urb(kbd->irq);
+	if (kbd->led)
+		usb_free_urb(kbd->led);
+	if (kbd->new)
+		usb_buffer_free(dev, 8, kbd->new, kbd->new_dma);
+	if (kbd->cr)
+		usb_buffer_free(dev, sizeof(struct usb_ctrlrequest), kbd->cr, kbd->cr_dma);
+	if (kbd->leds)
+		usb_buffer_free(dev, 1, kbd->leds, kbd->leds_dma);
+}
+
 static void *usb_kbd_probe(struct usb_device *dev, unsigned int ifnum,
 			   const struct usb_device_id *id)
 {
@@ -198,14 +233,8 @@ static void *usb_kbd_probe(struct usb_device *dev, unsigned int ifnum,
 	if (!(kbd = kmalloc(sizeof(struct usb_kbd), GFP_KERNEL))) return NULL;
 	memset(kbd, 0, sizeof(struct usb_kbd));
 
-	kbd->irq = usb_alloc_urb(0, GFP_KERNEL);
-	if (!kbd->irq) {
-		kfree(kbd);
-		return NULL;
-	}
-	kbd->led = usb_alloc_urb(0, GFP_KERNEL);
-	if (!kbd->led) {
-		usb_free_urb(kbd->irq);
+	if (usb_kbd_alloc_mem(dev, kbd)) {
+		usb_kbd_free_mem(dev, kbd);
 		kfree(kbd);
 		return NULL;
 	}
@@ -224,14 +253,17 @@ static void *usb_kbd_probe(struct usb_device *dev, unsigned int ifnum,
 	kbd->dev.open = usb_kbd_open;
 	kbd->dev.close = usb_kbd_close;
 
-	FILL_INT_URB(kbd->irq, dev, pipe, kbd->new, maxp > 8 ? 8 : maxp,
-		usb_kbd_irq, kbd, endpoint->bInterval);
+	usb_fill_int_urb(kbd->irq, dev, pipe,
+			 kbd->new, (maxp > 8 ? 8 : maxp),
+			 usb_kbd_irq, kbd, endpoint->bInterval);
+	kbd->irq->transfer_dma = kbd->new_dma;
+	kbd->irq->transfer_flags |= URB_NO_DMA_MAP;
 
-	kbd->cr.bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE;
-	kbd->cr.bRequest = 0x09;
-	kbd->cr.wValue = 0x200;
-	kbd->cr.wIndex = interface->bInterfaceNumber;
-	kbd->cr.wLength = 1;
+	kbd->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE;
+	kbd->cr->bRequest = 0x09;
+	kbd->cr->wValue = cpu_to_le16(0x200);
+	kbd->cr->wIndex = cpu_to_le16(interface->bInterfaceNumber);
+	kbd->cr->wLength = cpu_to_le16(1);
 
 	usb_make_path(dev, path, 64);
 	sprintf(kbd->phys, "%s/input0", path);
@@ -244,6 +276,8 @@ static void *usb_kbd_probe(struct usb_device *dev, unsigned int ifnum,
 	kbd->dev.id.version = dev->descriptor.bcdDevice;
 
 	if (!(buf = kmalloc(63, GFP_KERNEL))) {
+		usb_free_urb(kbd->irq);
+		usb_kbd_free_buffers(dev, kbd);
 		kfree(kbd);
 		return NULL;
 	}
@@ -261,9 +295,13 @@ static void *usb_kbd_probe(struct usb_device *dev, unsigned int ifnum,
 
 	kfree(buf);
 
-	FILL_CONTROL_URB(kbd->led, dev, usb_sndctrlpipe(dev, 0),
-		(void*) &kbd->cr, &kbd->leds, 1, usb_kbd_led, kbd);
-			
+	usb_fill_control_urb(kbd->led, dev, usb_sndctrlpipe(dev, 0),
+			     (void *) kbd->cr, kbd->leds, 1,
+			     usb_kbd_led, kbd);
+	kbd->led->setup_dma = kbd->cr_dma;
+	kbd->led->transfer_dma = kbd->leds_dma;
+	kbd->led->transfer_flags |= URB_NO_DMA_MAP;
+
 	input_register_device(&kbd->dev);
 
 	printk(KERN_INFO "input: %s on %s\n", kbd->name, path);
@@ -276,8 +314,7 @@ static void usb_kbd_disconnect(struct usb_device *dev, void *ptr)
 	struct usb_kbd *kbd = ptr;
 	usb_unlink_urb(kbd->irq);
 	input_unregister_device(&kbd->dev);
-	usb_free_urb(kbd->irq);
-	usb_free_urb(kbd->led);
+	usb_kbd_free_buffers(dev, kbd);
 	kfree(kbd);
 }
 

drivers/usb/input/usbmouse.c

@@ -46,13 +46,15 @@ MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_LICENSE(DRIVER_LICENSE);
 
 struct usb_mouse {
-	signed char data[8];
 	char name[128];
 	char phys[64];
 	struct usb_device *usbdev;
 	struct input_dev dev;
 	struct urb *irq;
 	int open;
+
+	signed char *data;
+	dma_addr_t data_dma;
 };
 
 static void usb_mouse_irq(struct urb *urb)
@@ -124,8 +126,15 @@ static void *usb_mouse_probe(struct usb_device *dev, unsigned int ifnum,
 	if (!(mouse = kmalloc(sizeof(struct usb_mouse), GFP_KERNEL))) return NULL;
 	memset(mouse, 0, sizeof(struct usb_mouse));
 
+	mouse->data = usb_buffer_alloc(dev, 8, SLAB_ATOMIC, &mouse->data_dma);
+	if (!mouse->data) {
+		kfree(mouse);
+		return NULL;
+	}
+
 	mouse->irq = usb_alloc_urb(0, GFP_KERNEL);
 	if (!mouse->irq) {
+		usb_buffer_free(dev, 8, mouse->data, mouse->data_dma);
 		kfree(mouse);
 		return NULL;
 	}
@@ -153,6 +162,7 @@ static void *usb_mouse_probe(struct usb_device *dev, unsigned int ifnum,
 	mouse->dev.id.version = dev->descriptor.bcdDevice;
 
 	if (!(buf = kmalloc(63, GFP_KERNEL))) {
+		usb_buffer_free(dev, 8, mouse->data, mouse->data_dma);
 		kfree(mouse);
 		return NULL;
 	}
@@ -170,8 +180,11 @@ static void *usb_mouse_probe(struct usb_device *dev, unsigned int ifnum,
 
 	kfree(buf);
 
-	FILL_INT_URB(mouse->irq, dev, pipe, mouse->data, maxp > 8 ? 8 : maxp,
-		usb_mouse_irq, mouse, endpoint->bInterval);
+	usb_fill_int_urb(mouse->irq, dev, pipe, mouse->data,
+			 (maxp > 8 ? 8 : maxp),
+			 usb_mouse_irq, mouse, endpoint->bInterval);
+	mouse->irq->transfer_dma = mouse->data_dma;
+	mouse->irq->transfer_flags |= URB_NO_DMA_MAP;
 
 	input_register_device(&mouse->dev);
 
@@ -186,6 +199,7 @@ static void usb_mouse_disconnect(struct usb_device *dev, void *ptr)
 	usb_unlink_urb(mouse->irq);
 	input_unregister_device(&mouse->dev);
 	usb_free_urb(mouse->irq);
+	usb_buffer_free(dev, 8, mouse->data, mouse->data_dma);
 	kfree(mouse);
 }
 

drivers/usb/input/wacom.c

@@ -96,7 +96,8 @@ struct wacom_features {
 };
 
 struct wacom {
-	signed char data[10];
+	signed char *data;
+	dma_addr_t data_dma;
 	struct input_dev dev;
 	struct usb_device *usbdev;
 	struct urb *irq;
@@ -364,8 +365,15 @@ static void *wacom_probe(struct usb_device *dev, unsigned int ifnum, const struc
 	if (!(wacom = kmalloc(sizeof(struct wacom), GFP_KERNEL))) return NULL;
 	memset(wacom, 0, sizeof(struct wacom));
 
+	wacom->data = usb_buffer_alloc(dev, 10, SLAB_ATOMIC, &wacom->data_dma);
+	if (!wacom->data) {
+		kfree(wacom);
+		return NULL;
+	}
+
 	wacom->irq = usb_alloc_urb(0, GFP_KERNEL);
 	if (!wacom->irq) {
+		usb_buffer_free(dev, 10, wacom->data, wacom->data_dma);
 		kfree(wacom);
 		return NULL;
 	}
@@ -413,8 +421,15 @@ static void *wacom_probe(struct usb_device *dev, unsigned int ifnum, const struc
 
 	endpoint = dev->config[0].interface[ifnum].altsetting[0].endpoint + 0;
 
-	FILL_INT_URB(wacom->irq, dev, usb_rcvintpipe(dev, endpoint->bEndpointAddress),
-		     wacom->data, wacom->features->pktlen, wacom->features->irq, wacom, endpoint->bInterval);
+	if (wacom->features->pktlen > 10)
+		BUG();
+
+	usb_fill_int_urb(wacom->irq, dev,
+			 usb_rcvintpipe(dev, endpoint->bEndpointAddress),
+			 wacom->data, wacom->features->pktlen,
+			 wacom->features->irq, wacom, endpoint->bInterval);
+	wacom->irq->transfer_dma = wacom->data_dma;
+	wacom->irq->transfer_flags |= URB_NO_DMA_MAP;
 
 	input_register_device(&wacom->dev);
 
@@ -429,6 +444,7 @@ static void wacom_disconnect(struct usb_device *dev, void *ptr)
 	usb_unlink_urb(wacom->irq);
 	input_unregister_device(&wacom->dev);
 	usb_free_urb(wacom->irq);
+	usb_buffer_free(dev, 10, wacom->data, wacom->data_dma);
 	kfree(wacom);
 }
 

drivers/usb/input/xpad.c

@@ -107,7 +107,8 @@ struct usb_xpad {
 	struct usb_device *udev;		/* usb device */
 	
 	struct urb *irq_in;			/* urb for interrupt in report */
-	unsigned char idata[XPAD_PKT_LEN];	/* input data */
+	unsigned char *idata;			/* input data */
+	dma_addr_t idata_dma;
 	
 	char phys[65];				/* physical device path */
 	int open_count;				/* reference count */
@@ -213,19 +214,29 @@ static void * xpad_probe(struct usb_device *udev, unsigned int ifnum, const stru
 	}
 	memset(xpad, 0, sizeof(struct usb_xpad));
 	
+	xpad->idata = usb_buffer_alloc(udev, XPAD_PKT_LEN,
+				       SLAB_ATOMIC, &xpad->idata_dma);
+	if (!xpad->idata) {
+		kfree(xpad);
+		return NULL;
+	}
+
 	xpad->irq_in = usb_alloc_urb(0, GFP_KERNEL);
         if (!xpad->irq_in) {
 		err("cannot allocate memory for new pad irq urb");
+		usb_buffer_free(udev, XPAD_PKT_LEN, xpad->idata, xpad->idata_dma);
                 kfree(xpad);
                 return NULL;
         }
 	
 	ep_irq_in = udev->actconfig->interface[ifnum].altsetting[0].endpoint + 0;
 	
-	FILL_INT_URB(xpad->irq_in, udev,
-		usb_rcvintpipe(udev, ep_irq_in->bEndpointAddress),
-		xpad->idata, XPAD_PKT_LEN, xpad_irq_in, xpad,
-		ep_irq_in->bInterval);
+	usb_fill_int_urb(xpad->irq_in, udev,
+			 usb_rcvintpipe(udev, ep_irq_in->bEndpointAddress),
+			 xpad->idata, XPAD_PKT_LEN, xpad_irq_in,
+			 xpad, ep_irq_in->bInterval);
+	xpad->irq_in->transfer_dma = xpad->idata_dma;
+	xpad->irq_in->transfer_flags |= URB_NO_DMA_MAP;
 	
 	xpad->udev = udev;
 	
@@ -290,6 +301,7 @@ static void xpad_disconnect(struct usb_device *udev, void *ptr)
 	usb_unlink_urb(xpad->irq_in);
 	input_unregister_device(&xpad->dev);
 	usb_free_urb(xpad->irq_in);
+	usb_buffer_free(udev, XPAD_PKT_LEN, xpad->idata, xpad->idata_dma);
 	kfree(xpad);
 }