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authorAlan Stern <stern@rowland.harvard.edu>2006-07-28 17:07:34 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2006-08-02 16:41:42 -0700
commitb4dbda1a22d236842b75be4e2679a96a4fd72632 (patch)
treeae910b3268c443e883b81a46a3bc7e34450ce0d8 /drivers/usb
parentbe0c8015a2e981b9079cb5f0e2bf868fa10249ae (diff)
USB: dummy-hcd: disable interrupts during req->complete
This patch (as756) fixes a bug in dummy-hcd found by the lockdep checker. In one of the code paths, the driver did not disable interrupts before calling a request completion routine. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/gadget/dummy_hcd.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/usb/gadget/dummy_hcd.c b/drivers/usb/gadget/dummy_hcd.c
index 4be47195bd38..7d1c22c34957 100644
--- a/drivers/usb/gadget/dummy_hcd.c
+++ b/drivers/usb/gadget/dummy_hcd.c
@@ -609,7 +609,8 @@ static int dummy_dequeue (struct usb_ep *_ep, struct usb_request *_req)
if (!dum->driver)
return -ESHUTDOWN;
- spin_lock_irqsave (&dum->lock, flags);
+ local_irq_save (flags);
+ spin_lock (&dum->lock);
list_for_each_entry (req, &ep->queue, queue) {
if (&req->req == _req) {
list_del_init (&req->queue);
@@ -618,7 +619,7 @@ static int dummy_dequeue (struct usb_ep *_ep, struct usb_request *_req)
break;
}
}
- spin_unlock_irqrestore (&dum->lock, flags);
+ spin_unlock (&dum->lock);
if (retval == 0) {
dev_dbg (udc_dev(dum),
@@ -626,6 +627,7 @@ static int dummy_dequeue (struct usb_ep *_ep, struct usb_request *_req)
req, _ep->name, _req->length, _req->buf);
_req->complete (_ep, _req);
}
+ local_irq_restore (flags);
return retval;
}