This is a note to let you know that I've just added the patch titled
Subject: USB: Add URB_FREE_BUFFER flag and the logic behind it
to my gregkh-2.6 tree. Its filename is
usb-add-urb_free_buffer-flag-and-the-logic-behind-it.patch
This tree can be found at
http://www.kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/patches/
>From [EMAIL PROTECTED] Tue Jun 12 23:03:11 2007
From: Marcel Holtmann <[EMAIL PROTECTED]>
Date: Wed, 13 Jun 2007 08:02:11 +0200
Subject: USB: Add URB_FREE_BUFFER flag and the logic behind it
To: Greg KH <[EMAIL PROTECTED]>
Cc: USB development list <[email protected]>
Message-ID: <[EMAIL PROTECTED]>
USB: Add URB_FREE_BUFFER flag for freeing the transfer buffer
In some cases it is not needed that the driver keeps track of the
transfer buffer of an URB. It can be simply freed along with the
URB itself when the reference count goes down to zero. The new
flag URB_FREE_BUFFER enables this behavior.
Signed-off-by: Marcel Holtmann <[EMAIL PROTECTED]>
Signed-off-by: Greg Kroah-Hartman <[EMAIL PROTECTED]>
---
drivers/usb/core/urb.c | 3 +++
include/linux/usb.h | 1 +
2 files changed, 4 insertions(+)
--- a/drivers/usb/core/urb.c
+++ b/drivers/usb/core/urb.c
@@ -13,6 +13,9 @@ static void urb_destroy(struct kref *kre
{
struct urb *urb = to_urb(kref);
+ if (urb->transfer_flags & URB_FREE_BUFFER)
+ kfree(urb->transfer_buffer);
+
kfree(urb);
}
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -978,6 +978,7 @@ extern int usb_disabled(void);
#define URB_ZERO_PACKET 0x0040 /* Finish bulk OUT with short
packet */
#define URB_NO_INTERRUPT 0x0080 /* HINT: no non-error interrupt
* needed */
+#define URB_FREE_BUFFER 0x0100 /* Free transfer buffer with
the URB */
struct usb_iso_packet_descriptor {
unsigned int offset;
Patches currently in gregkh-2.6 which might be from [EMAIL PROTECTED] are
usb/usb-hub.c-loops-forever-on-resume-from-ram-due-to-bluetooth.patch
usb/usb-add-urb_free_buffer-flag-and-the-logic-behind-it.patch
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