From: Alan Stern Date: Thu, 19 Jan 2006 15:46:27 +0000 (-0500) Subject: [PATCH] USB core and HCDs: don't put_device while atomic X-Git-Tag: v2.6.17-rc1~1176^2~35 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6a8e87b23ff4a979bde5451a242466a4b3f9fe7d;p=linux-2.6 [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 Acked-by: David Brownell Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index a98d978d76..fbd938d4ea 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -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; diff --git a/drivers/usb/host/ehci-mem.c b/drivers/usb/host/ehci-mem.c index 91c2ab43cb..ec7eb3f4f8 100644 --- a/drivers/usb/host/ehci-mem.c +++ b/drivers/usb/host/ehci-mem.c @@ -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); } diff --git a/drivers/usb/host/ehci-q.c b/drivers/usb/host/ehci-q.c index 5ada7cd569..e469221e7e 100644 --- a/drivers/usb/host/ehci-q.c +++ b/drivers/usb/host/ehci-q.c @@ -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) { diff --git a/drivers/usb/host/ehci-sched.c b/drivers/usb/host/ehci-sched.c index 88419c6823..90d6900a37 100644 --- a/drivers/usb/host/ehci-sched.c +++ b/drivers/usb/host/ehci-sched.c @@ -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; } diff --git a/drivers/usb/host/isp116x-hcd.c b/drivers/usb/host/isp116x-hcd.c index 972ce04889..fea5dcbec7 100644 --- a/drivers/usb/host/isp116x-hcd.c +++ b/drivers/usb/host/isp116x-hcd.c @@ -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; } diff --git a/drivers/usb/host/sl811-hcd.c b/drivers/usb/host/sl811-hcd.c index 517360b77d..a923430527 100644 --- a/drivers/usb/host/sl811-hcd.c +++ b/drivers/usb/host/sl811-hcd.c @@ -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; } diff --git a/drivers/usb/host/uhci-q.c b/drivers/usb/host/uhci-q.c index 5d2f9575ab..a06d84c19e 100644 --- a/drivers/usb/host/uhci-q.c +++ b/drivers/usb/host/uhci-q.c @@ -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);