Mattia Dongili wrote:
That would be great, but I can't see any patch attached :)
Index: linux/drivers/usb/core/urb.c
===================================================================
--- linux.orig/drivers/usb/core/urb.c
+++ linux/drivers/usb/core/urb.c
@@ -224,8 +224,10 @@ int usb_submit_urb(struct urb *urb, gfp_
struct usb_operations *op;
int is_out;
- if (!urb || urb->hcpriv || !urb->complete)
+ if (!urb || urb->hcpriv || !urb->complete) {
+ printk("bad urb\n");
return -EINVAL;
+ }
if (!(dev = urb->dev) ||
(dev->state < USB_STATE_DEFAULT) ||
(!dev->bus) || (dev->devnum <= 0))
@@ -279,8 +281,10 @@ int usb_submit_urb(struct urb *urb, gfp_
max *= mult;
}
- if (urb->number_of_packets <= 0)
+ if (urb->number_of_packets <= 0) {
+ printk("num_of_packets <= 0\n");
return -EINVAL;
+ }
for (n = 0; n < urb->number_of_packets; n++) {
len = urb->iso_frame_desc [n].length;
if (len < 0 || len > max)
@@ -343,8 +347,10 @@ int usb_submit_urb(struct urb *urb, gfp_
case PIPE_ISOCHRONOUS:
case PIPE_INTERRUPT:
/* too small? */
- if (urb->interval <= 0)
+ if (urb->interval <= 0) {
+ printk("too small\n");
return -EINVAL;
+ }
/* too big? */
switch (dev->speed) {
case USB_SPEED_HIGH: /* units are microframes */
@@ -356,8 +362,10 @@ int usb_submit_urb(struct urb *urb, gfp_
case USB_SPEED_FULL: /* units are frames/msec */
case USB_SPEED_LOW:
if (temp == PIPE_INTERRUPT) {
- if (urb->interval > 255)
+ if (urb->interval > 255) {
+ printk("too big\n");
return -EINVAL;
+ }
// NOTE ohci only handles up to 32
temp = 128;
} else {
@@ -368,6 +376,7 @@ int usb_submit_urb(struct urb *urb, gfp_
}
break;
default:
+ printk("unknown speed\n");
return -EINVAL;
}
/* power of two? */
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