[patch] bug fix in usbdevfs

[patch] bug fix in usbdevfs

[Christopher Li]

Hi,

I am sorry that the last patch about 32 bit compat ioctl on
64 bit kernel actually breaks the usbdevfs. That is on the current
BK tree. I am retarded. 

Here is the patch to fix it. Tested with USB hard disk and webcam
in both 32bit compatible mode and native 64bit mode.

Again, sorry about that.

Chris


Index: linux-2.5/drivers/usb/core/devio.c
===================================================================
--- linux-2.5.orig/drivers/usb/core/devio.c	2005-03-30 18:19:50.000000000 -0800
+++ linux-2.5/drivers/usb/core/devio.c	2005-03-30 19:35:31.000000000 -0800
@@ -1032,15 +1032,15 @@
 	if (put_user(urb->error_count, &userurb->error_count))
 		return -EFAULT;
 
-	if (!(usb_pipeisoc(urb->pipe)))
-		return 0;
-	for (i = 0; i < urb->number_of_packets; i++) {
-		if (put_user(urb->iso_frame_desc[i].actual_length,
-			     &userurb->iso_frame_desc[i].actual_length))
-			return -EFAULT;
-		if (put_user(urb->iso_frame_desc[i].status,
-			     &userurb->iso_frame_desc[i].status))
-			return -EFAULT;
+	if (usb_pipeisoc(urb->pipe)) {
+		for (i = 0; i < urb->number_of_packets; i++) {
+			if (put_user(urb->iso_frame_desc[i].actual_length,
+				     &userurb->iso_frame_desc[i].actual_length))
+				return -EFAULT;
+			if (put_user(urb->iso_frame_desc[i].status,
+				     &userurb->iso_frame_desc[i].status))
+				return -EFAULT;
+		}
 	}
 
 	free_async(as);
@@ -1126,7 +1126,7 @@
 	if (get_urb32(&uurb,(struct usbdevfs_urb32 *)arg))
 		return -EFAULT;
 
-	return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb __user *)arg)->iso_frame_desc, arg);
+	return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, arg);
 }
 
 static int processcompl_compat(struct async *as, void __user * __user *arg)
@@ -1146,15 +1146,15 @@
 	if (put_user(urb->error_count, &userurb->error_count))
 		return -EFAULT;
 
-	if (!(usb_pipeisoc(urb->pipe)))
-		return 0;
-	for (i = 0; i < urb->number_of_packets; i++) {
-		if (put_user(urb->iso_frame_desc[i].actual_length,
-			     &userurb->iso_frame_desc[i].actual_length))
-			return -EFAULT;
-		if (put_user(urb->iso_frame_desc[i].status,
-			     &userurb->iso_frame_desc[i].status))
-			return -EFAULT;
+	if (usb_pipeisoc(urb->pipe)) {
+		for (i = 0; i < urb->number_of_packets; i++) {
+			if (put_user(urb->iso_frame_desc[i].actual_length,
+				     &userurb->iso_frame_desc[i].actual_length))
+				return -EFAULT;
+			if (put_user(urb->iso_frame_desc[i].status,
+				     &userurb->iso_frame_desc[i].status))
+				return -EFAULT;
+		}
 	}
 
 	free_async(as);
@@ -1177,10 +1177,8 @@
 {
 	struct async *as;
 
-	printk("reapurbnblock\n");
 	if (!(as = async_getcompleted(ps)))
 		return -EAGAIN;
-	printk("reap got as %p\n", as);
 	return processcompl_compat(as, (void __user * __user *)arg);
 }
 

Re: [patch] bug fix in usbdevfs

[Greg KH]

On Wed, Mar 30, 2005 at 07:51:23PM -0500, Christopher Li wrote:
> Hi,
> 
> I am sorry that the last patch about 32 bit compat ioctl on
> 64 bit kernel actually breaks the usbdevfs. That is on the current
> BK tree. I am retarded. 
> 
> Here is the patch to fix it. Tested with USB hard disk and webcam
> in both 32bit compatible mode and native 64bit mode.
> 
> Again, sorry about that.

Applied, thanks.

greg k-h