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"
<linux-usb-devel@lists.sourceforge.net>
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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