diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/host/xhci-hub.c | 2 | ||||
| -rw-r--r-- | drivers/usb/host/xhci-ring.c | 10 | ||||
| -rw-r--r-- | drivers/usb/host/xhci.c | 25 | ||||
| -rw-r--r-- | drivers/usb/host/xhci.h | 1 |
4 files changed, 17 insertions, 21 deletions
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c index fae697ed0b70..ccf0a06199a3 100644 --- a/drivers/usb/host/xhci-hub.c +++ b/drivers/usb/host/xhci-hub.c @@ -287,7 +287,7 @@ static int xhci_stop_device(struct xhci_hcd *xhci, int slot_id, int suspend) if (virt_dev->eps[i].ring && virt_dev->eps[i].ring->dequeue) xhci_queue_stop_endpoint(xhci, slot_id, i, suspend); } - cmd->command_trb = xhci->cmd_ring->enqueue; + cmd->command_trb = xhci_find_next_enqueue(xhci->cmd_ring); list_add_tail(&cmd->cmd_list, &virt_dev->cmd_list); xhci_queue_stop_endpoint(xhci, slot_id, 0, suspend); xhci_ring_cmd_db(xhci); diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index aaa2906f7b78..9ac9672d4498 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -123,6 +123,16 @@ static int enqueue_is_link_trb(struct xhci_ring *ring) return TRB_TYPE_LINK_LE32(link->control); } +union xhci_trb *xhci_find_next_enqueue(struct xhci_ring *ring) +{ + /* Enqueue pointer can be left pointing to the link TRB, + * we must handle that + */ + if (TRB_TYPE_LINK_LE32(ring->enqueue->link.control)) + return ring->enq_seg->next->trbs; + return ring->enqueue; +} + /* Updates trb to point to the next TRB in the ring, and updates seg if the next * TRB is in a new segment. This does not skip over link TRBs, and it does not * effect the ring dequeue or enqueue pointers. diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index 49b6edb84a79..1e36dbb48366 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -2598,15 +2598,7 @@ static int xhci_configure_endpoint(struct xhci_hcd *xhci, if (command) { cmd_completion = command->completion; cmd_status = &command->status; - command->command_trb = xhci->cmd_ring->enqueue; - - /* Enqueue pointer can be left pointing to the link TRB, - * we must handle that - */ - if (TRB_TYPE_LINK_LE32(command->command_trb->link.control)) - command->command_trb = - xhci->cmd_ring->enq_seg->next->trbs; - + command->command_trb = xhci_find_next_enqueue(xhci->cmd_ring); list_add_tail(&command->cmd_list, &virt_dev->cmd_list); } else { cmd_completion = &virt_dev->cmd_completion; @@ -2614,7 +2606,7 @@ static int xhci_configure_endpoint(struct xhci_hcd *xhci, } init_completion(cmd_completion); - cmd_trb = xhci->cmd_ring->dequeue; + cmd_trb = xhci_find_next_enqueue(xhci->cmd_ring); if (!ctx_change) ret = xhci_queue_configure_endpoint(xhci, in_ctx->dma, udev->slot_id, must_succeed); @@ -3439,14 +3431,7 @@ int xhci_discover_or_reset_device(struct usb_hcd *hcd, struct usb_device *udev) /* Attempt to submit the Reset Device command to the command ring */ spin_lock_irqsave(&xhci->lock, flags); - reset_device_cmd->command_trb = xhci->cmd_ring->enqueue; - - /* Enqueue pointer can be left pointing to the link TRB, - * we must handle that - */ - if (TRB_TYPE_LINK_LE32(reset_device_cmd->command_trb->link.control)) - reset_device_cmd->command_trb = - xhci->cmd_ring->enq_seg->next->trbs; + reset_device_cmd->command_trb = xhci_find_next_enqueue(xhci->cmd_ring); list_add_tail(&reset_device_cmd->cmd_list, &virt_dev->cmd_list); ret = xhci_queue_reset_device(xhci, slot_id); @@ -3650,7 +3635,7 @@ int xhci_alloc_dev(struct usb_hcd *hcd, struct usb_device *udev) union xhci_trb *cmd_trb; spin_lock_irqsave(&xhci->lock, flags); - cmd_trb = xhci->cmd_ring->dequeue; + cmd_trb = xhci_find_next_enqueue(xhci->cmd_ring); ret = xhci_queue_slot_control(xhci, TRB_ENABLE_SLOT, 0); if (ret) { spin_unlock_irqrestore(&xhci->lock, flags); @@ -3785,7 +3770,7 @@ int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev) slot_ctx->dev_info >> 27); spin_lock_irqsave(&xhci->lock, flags); - cmd_trb = xhci->cmd_ring->dequeue; + cmd_trb = xhci_find_next_enqueue(xhci->cmd_ring); ret = xhci_queue_address_device(xhci, virt_dev->in_ctx->dma, udev->slot_id); if (ret) { diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 46aa14894148..f3e10206cd95 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -1840,6 +1840,7 @@ int xhci_cancel_cmd(struct xhci_hcd *xhci, struct xhci_command *command, union xhci_trb *cmd_trb); void xhci_ring_ep_doorbell(struct xhci_hcd *xhci, unsigned int slot_id, unsigned int ep_index, unsigned int stream_id); +union xhci_trb *xhci_find_next_enqueue(struct xhci_ring *ring); /* xHCI roothub code */ void xhci_set_link_state(struct xhci_hcd *xhci, __le32 __iomem **port_array, |