From stern@rowland.harvard.edu Thu Jan 19 07:46:36 2006 Date: Thu, 19 Jan 2006 10:46:27 -0500 (EST) From: Alan Stern To: Greg KH cc: David Brownell , Olav Kongas Subject: [PATCH] USB core and HCDs: don't put_device while atomic Message-ID: 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 --- drivers/usb/core/hcd.c | 2 -- drivers/usb/host/ehci-mem.c | 1 - drivers/usb/host/ehci-q.c | 2 +- drivers/usb/host/ehci-sched.c | 6 ++---- drivers/usb/host/isp116x-hcd.c | 3 +-- drivers/usb/host/sl811-hcd.c | 3 +-- drivers/usb/host/uhci-q.c | 2 -- 7 files changed, 5 insertions(+), 14 deletions(-) --- gregkh-2.6.orig/drivers/usb/host/uhci-q.c +++ gregkh-2.6/drivers/usb/host/uhci-q.c @@ -179,7 +179,6 @@ static struct uhci_qh *uhci_alloc_qh(str 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 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); --- gregkh-2.6.orig/drivers/usb/core/hcd.c +++ gregkh-2.6/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 *u 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; --- gregkh-2.6.orig/drivers/usb/host/isp116x-hcd.c +++ gregkh-2.6/drivers/usb/host/isp116x-hcd.c @@ -724,7 +724,7 @@ static int isp116x_urb_enqueue(struct us 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(str if (!list_empty(&hep->urb_list)) WARN("ep %p not empty?\n", ep); - usb_put_dev(ep->udev); kfree(ep); hep->hcpriv = NULL; } --- gregkh-2.6.orig/drivers/usb/host/ehci-mem.c +++ gregkh-2.6/drivers/usb/host/ehci-mem.c @@ -75,7 +75,6 @@ static void qh_destroy (struct kref *kre } if (qh->dummy) ehci_qtd_free (ehci, qh->dummy); - usb_put_dev (qh->dev); dma_pool_free (ehci->qh_pool, qh, qh->qh_dma); } --- gregkh-2.6.orig/drivers/usb/host/ehci-q.c +++ gregkh-2.6/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) { --- gregkh-2.6.orig/drivers/usb/host/ehci-sched.c +++ gregkh-2.6/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; } --- gregkh-2.6.orig/drivers/usb/host/sl811-hcd.c +++ gregkh-2.6/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 * if (!list_empty(&hep->urb_list)) WARN("ep %p not empty?\n", ep); - usb_put_dev(ep->udev); kfree(ep); hep->hcpriv = NULL; }