diff options
| -rw-r--r-- | drivers/usb/core/hub.c | 79 | ||||
| -rw-r--r-- | drivers/usb/core/usb.c | 1 | ||||
| -rw-r--r-- | include/linux/usb.h | 1 |
3 files changed, 20 insertions, 61 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index b311005ff1a..a523c8f20b5 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -946,24 +946,21 @@ static int locktree(struct usb_device *udev) t = locktree(hdev); if (t < 0) return t; - for (t = 0; t < hdev->maxchild; t++) { - if (hdev->children[t] == udev) { - /* everything is fail-fast once disconnect - * processing starts - */ - if (udev->state == USB_STATE_NOTATTACHED) - break; - /* when everyone grabs locks top->bottom, - * non-overlapping work may be concurrent - */ - usb_lock_device(udev); - usb_unlock_device(hdev); - return t + 1; - } + /* everything is fail-fast once disconnect + * processing starts + */ + if (udev->state == USB_STATE_NOTATTACHED) { + usb_unlock_device(hdev); + return -ENODEV; } + + /* when everyone grabs locks top->bottom, + * non-overlapping work may be concurrent + */ + usb_lock_device(udev); usb_unlock_device(hdev); - return -ENODEV; + return udev->portnum; } static void recursively_mark_NOTATTACHED(struct usb_device *udev) @@ -1335,15 +1332,9 @@ int usb_new_device(struct usb_device *udev) le16_to_cpu(udev->config[0].desc.wTotalLength), USB_DT_OTG, (void **) &desc) == 0) { if (desc->bmAttributes & USB_OTG_HNP) { - unsigned port1; + unsigned port1 = udev->portnum; struct usb_device *root = udev->parent; - for (port1 = 1; port1 <= root->maxchild; - port1++) { - if (root->children[port1-1] == udev) - break; - } - dev_info(&udev->dev, "Dual-Role OTG device on %sHNP port\n", (port1 == bus->otg_port) @@ -1720,22 +1711,9 @@ static int __usb_suspend_device (struct usb_device *udev, int port1) int usb_suspend_device(struct usb_device *udev) { #ifdef CONFIG_USB_SUSPEND - int port1; - if (udev->state == USB_STATE_NOTATTACHED) return -ENODEV; - if (!udev->parent) - port1 = 0; - else { - for (port1 = udev->parent->maxchild; port1 > 0; --port1) { - if (udev->parent->children[port1-1] == udev) - break; - } - if (port1 == 0) - return -ENODEV; - } - - return __usb_suspend_device(udev, port1); + return __usb_suspend_device(udev, udev->portnum); #else /* NOTE: udev->state unchanged, it's not lying ... */ udev->dev.power.power_state = PMSG_SUSPEND; @@ -1893,20 +1871,10 @@ hub_port_resume(struct usb_hub *hub, int port1, struct usb_device *udev) */ int usb_resume_device(struct usb_device *udev) { - int port1, status; + int status; if (udev->state == USB_STATE_NOTATTACHED) return -ENODEV; - if (!udev->parent) - port1 = 0; - else { - for (port1 = udev->parent->maxchild; port1 > 0; --port1) { - if (udev->parent->children[port1-1] == udev) - break; - } - if (port1 == 0) - return -ENODEV; - } #ifdef CONFIG_USB_SUSPEND /* selective resume of one downstream hub-to-device port */ @@ -1915,7 +1883,7 @@ int usb_resume_device(struct usb_device *udev) // NOTE swsusp may bork us, device state being wrong... // NOTE this fails if parent is also suspended... status = hub_port_resume(hdev_to_hub(udev->parent), - port1, udev); + udev->portnum, udev); } else status = 0; } else @@ -3029,7 +2997,8 @@ int usb_reset_device(struct usb_device *udev) struct usb_hub *parent_hub; struct usb_device_descriptor descriptor = udev->descriptor; struct usb_hub *hub = NULL; - int i, ret = 0, port1 = -1; + int i, ret = 0; + int port1 = udev->portnum; if (udev->state == USB_STATE_NOTATTACHED || udev->state == USB_STATE_SUSPENDED) { @@ -3043,18 +3012,6 @@ int usb_reset_device(struct usb_device *udev) dev_dbg(&udev->dev, "%s for root hub!\n", __FUNCTION__); return -EISDIR; } - - for (i = 0; i < parent_hdev->maxchild; i++) - if (parent_hdev->children[i] == udev) { - port1 = i + 1; - break; - } - - if (port1 < 0) { - /* If this ever happens, it's very bad */ - dev_err(&udev->dev, "Can't locate device's port!\n"); - return -ENOENT; - } parent_hub = hdev_to_hub(parent_hdev); /* If we're resetting an active hub, take some special actions */ diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c index fcfda21be49..39e6b61b898 100644 --- a/drivers/usb/core/usb.c +++ b/drivers/usb/core/usb.c @@ -439,6 +439,7 @@ usb_alloc_dev(struct usb_device *parent, struct usb_bus *bus, unsigned port1) /* hub driver sets up TT records */ } + dev->portnum = port1; dev->bus = bus; dev->parent = parent; INIT_LIST_HEAD(&dev->filelist); diff --git a/include/linux/usb.h b/include/linux/usb.h index 27575e678a7..e59d1bd52d4 100644 --- a/include/linux/usb.h +++ b/include/linux/usb.h @@ -348,6 +348,7 @@ struct usb_device { char **rawdescriptors; /* Raw descriptors for each config */ unsigned short bus_mA; /* Current available from the bus */ + u8 portnum; /* Parent port number (origin 1) */ int have_langid; /* whether string_langid is valid */ int string_langid; /* language ID for strings */ |