patch usb-fix-spinlock-recursion-in-cdc-acm.c.patch added to gregkh-2.6 tree

This is a note to let you know that I've just added the patch titled

     Subject: USB: fix spinlock recursion in cdc-acm.c

to my gregkh-2.6 tree.  Its filename is

     usb-fix-spinlock-recursion-in-cdc-acm.c.patch

This tree can be found at 
    http://www.kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/patches/


>From [email protected] Tue Mar  6 01:47:02 2007
From: Oliver Neukum <[email protected]>
Date: Tue, 6 Mar 2007 10:47:04 +0100
Subject: USB: fix spinlock recursion in cdc-acm.c
To: [email protected], Pete Zaitcev <[email protected]>, "list, USB" <[email protected]>
Message-ID: <[email protected]>
Content-Disposition: inline


this fixes the spinlock recursion issue. The older fix was incomplete.


Signed-off-by: Oliver Neukum <[email protected]>
Acked-by: Pete Zaitcev <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

--- a/drivers/usb/class/cdc-acm.c	2007-03-06 10:39:50.000000000 +0100
+++ b/drivers/usb/class/cdc-acm.c	2007-03-06 10:39:55.000000000 +0100
@@ -332,9 +332,9 @@
 	if (!ACM_READY(acm))
 		return;
 
-	spin_lock(&acm->throttle_lock);
+	spin_lock_irqsave(&acm->throttle_lock, flags);
 	throttled = acm->throttle;
-	spin_unlock(&acm->throttle_lock);
+	spin_unlock_irqrestore(&acm->throttle_lock, flags);
 	if (throttled)
 		return;
 
@@ -352,9 +352,9 @@
 	dbg("acm_rx_tasklet: procesing buf 0x%p, size = %d", buf, buf->size);
 
 	tty_buffer_request_room(tty, buf->size);
-	spin_lock(&acm->throttle_lock);
+	spin_lock_irqsave(&acm->throttle_lock, flags);
 	throttled = acm->throttle;
-	spin_unlock(&acm->throttle_lock);
+	spin_unlock_irqrestore(&acm->throttle_lock, flags);
 	if (!throttled)
 		tty_insert_flip_string(tty, buf->base, buf->size);
 	tty_flip_buffer_push(tty);


Patches currently in gregkh-2.6 which might be from [email protected] are


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