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[PATCH] USB core and HCDs: don't put_device while atomic 

This patch (as640) removes several put_device and the corresponding
get_device calls from the USB core and HCDs.  Some of the puts were done
in atomic contexts, and none of them are needed since the core now
guarantees that every endpoint will be disabled and every URB completed
before a USB device is released.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: David Brownell <david-b@pacbell.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern 2006-01-19 10:46:27 -05:00 committed by Greg Kroah-Hartman
parent 1393adb2eb
commit 6a8e87b23f
7 changed files with 5 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/usb/core/hcd.c
View File

@ -1105,7 +1105,6 @@ static void urb_unlink (struct urb *urb)
spin_lock_irqsave (&hcd_data_lock, flags);
list_del_init (&urb->urb_list);
spin_unlock_irqrestore (&hcd_data_lock, flags);
usb_put_dev (urb->dev);
}
@ -1145,7 +1144,6 @@ static int hcd_submit_urb (struct urb *urb, gfp_t mem_flags)
case HC_STATE_RUNNING:
case HC_STATE_RESUMING:
doit:
usb_get_dev (urb->dev);
list_add_tail (&urb->urb_list, &ep->urb_list);
status = 0;
break;

1
drivers/usb/host/ehci-mem.c
View File

@ -75,7 +75,6 @@ static void qh_destroy (struct kref *kref)
}
if (qh->dummy)
ehci_qtd_free (ehci, qh->dummy);
usb_put_dev (qh->dev);
dma_pool_free (ehci->qh_pool, qh, qh->qh_dma);
}

2
drivers/usb/host/ehci-q.c
View File

@ -702,7 +702,7 @@ qh_make (
}
/* support for tt scheduling, and access to toggles */
qh->dev = usb_get_dev (urb->dev);
qh->dev = urb->dev;
/* using TT? */
switch (urb->dev->speed) {

6
drivers/usb/host/ehci-sched.c
View File

@ -1399,7 +1399,7 @@ itd_complete (
*/
/* give urb back to the driver ... can be out-of-order */
dev = usb_get_dev (urb->dev);
dev = urb->dev;
ehci_urb_done (ehci, urb, regs);
urb = NULL;
@ -1418,7 +1418,6 @@ itd_complete (
(stream->bEndpointAddress & USB_DIR_IN) ? "in" : "out");
}
iso_stream_put (ehci, stream);
usb_put_dev (dev);
return 1;
}
@ -1765,7 +1764,7 @@ sitd_complete (
*/
/* give urb back to the driver */
dev = usb_get_dev (urb->dev);
dev = urb->dev;
ehci_urb_done (ehci, urb, regs);
urb = NULL;
@ -1784,7 +1783,6 @@ sitd_complete (
(stream->bEndpointAddress & USB_DIR_IN) ? "in" : "out");
}
iso_stream_put (ehci, stream);
usb_put_dev (dev);
return 1;
}

3
drivers/usb/host/isp116x-hcd.c
View File

@ -724,7 +724,7 @@ static int isp116x_urb_enqueue(struct usb_hcd *hcd,
ep = hep->hcpriv;
else {
INIT_LIST_HEAD(&ep->schedule);
ep->udev = usb_get_dev(udev);
ep->udev = udev;
ep->epnum = epnum;
ep->maxpacket = usb_maxpacket(udev, urb->pipe, is_out);
usb_settoggle(udev, epnum, is_out, 0);
@ -891,7 +891,6 @@ static void isp116x_endpoint_disable(struct usb_hcd *hcd,
if (!list_empty(&hep->urb_list))
WARN("ep %p not empty?\n", ep);
usb_put_dev(ep->udev);
kfree(ep);
hep->hcpriv = NULL;
}

3
drivers/usb/host/sl811-hcd.c
View File

@ -853,7 +853,7 @@ static int sl811h_urb_enqueue(
} else {
INIT_LIST_HEAD(&ep->schedule);
ep->udev = usb_get_dev(udev);
ep->udev = udev;
ep->epnum = epnum;
ep->maxpacket = usb_maxpacket(udev, urb->pipe, is_out);
ep->defctrl = SL11H_HCTLMASK_ARM | SL11H_HCTLMASK_ENABLE;
@ -1052,7 +1052,6 @@ sl811h_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *hep)
if (!list_empty(&hep->urb_list))
WARN("ep %p not empty?\n", ep);
usb_put_dev(ep->udev);
kfree(ep);
hep->hcpriv = NULL;
}

2
drivers/usb/host/uhci-q.c
View File

@ -179,7 +179,6 @@ static struct uhci_qh *uhci_alloc_qh(struct uhci_hcd *uhci,
qh->hep = hep;
qh->udev = udev;
hep->hcpriv = qh;
usb_get_dev(udev);
} else { /* Skeleton QH */
qh->state = QH_STATE_ACTIVE;
@ -197,7 +196,6 @@ static void uhci_free_qh(struct uhci_hcd *uhci, struct uhci_qh *qh)
list_del(&qh->node);
if (qh->udev) {
qh->hep->hcpriv = NULL;
usb_put_dev(qh->udev);
uhci_free_td(uhci, qh->dummy_td);
}
dma_pool_free(uhci->qh_pool, qh, qh->dma_handle);