From: Dan Carpenter <dan.carpenter@oracle.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org, netdev@vger.kernel.org,
kernel-janitors@vger.kernel.org
Subject: [patch] USB: kaweth.c: use GFP_ATOMIC under spin_lock
Date: Fri, 27 Jul 2012 14:46:51 +0300 [thread overview]
Message-ID: <20120727114651.GA15492@elgon.mountain> (raw)
The problem is that we call this with a spin lock held. The call tree
is:
kaweth_start_xmit() holds kaweth->device_lock.
-> kaweth_async_set_rx_mode()
-> kaweth_control()
-> kaweth_internal_control_msg()
The kaweth_internal_control_msg() function is only called from
kaweth_control() which used GFP_ATOMIC for its allocations.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
Applies to Linus's tree.
diff --git a/drivers/net/usb/kaweth.c b/drivers/net/usb/kaweth.c
index d8ad552..c3d0349 100644
--- a/drivers/net/usb/kaweth.c
+++ b/drivers/net/usb/kaweth.c
@@ -1314,7 +1314,7 @@ static int kaweth_internal_control_msg(struct usb_device *usb_dev,
int retv;
int length = 0; /* shut up GCC */
- urb = usb_alloc_urb(0, GFP_NOIO);
+ urb = usb_alloc_urb(0, GFP_ATOMIC);
if (!urb)
return -ENOMEM;
next reply other threads:[~2012-07-27 11:47 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-27 11:46 Dan Carpenter [this message]
2012-07-27 20:46 ` [patch] USB: kaweth.c: use GFP_ATOMIC under spin_lock David Miller
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