Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-28 23:21:31 +00:00
Code Issues Packages Projects Releases Wiki Activity

usb: cleanup setting udev->removable from port_dev->connect_type

Browse Source 
Once usb-acpi has set the port's connect type the usb_device's
->removable attribute can be set in the standard location
set_usb_port_removable().

This also changes behavior in the case where the firmware says that the
port connect type is unknown.  In that case just use the default setting
determined from the hub descriptor.

Note, we no longer pass udev->portnum to acpi_find_child_device() in the
root hub case since:
1/ the usb-core sets this to zero
2/ acpi always expects zero
...just pass zero.

Suggested-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dan Williams 2014-05-20 18:08:22 -07:00 committed by Greg Kroah-Hartman
parent d99f6b4130
commit a4204ff0bd
2 changed files with 23 additions and 33 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/usb/core/hub.c
View File

@ -2305,6 +2305,22 @@ static void set_usb_port_removable(struct usb_device *udev)
udev->removable = USB_DEVICE_REMOVABLE;
else
udev->removable = USB_DEVICE_FIXED;
/*
* Platform firmware may have populated an alternative value for
* removable. If the parent port has a known connect_type use
* that instead.
*/
switch (hub->ports[udev->portnum - 1]->connect_type) {
case USB_PORT_CONNECT_TYPE_HOT_PLUG:
udev->removable = USB_DEVICE_REMOVABLE;
break;
case USB_PORT_CONNECT_TYPE_HARD_WIRED:
udev->removable = USB_DEVICE_FIXED;
break;
default: /* use what was set above */
break;
}
}
/**
@ -2374,11 +2390,7 @@ int usb_new_device(struct usb_device *udev)
device_enable_async_suspend(&udev->dev);
/*
* check whether the hub marks this port as non-removable. Do it
* now so that platform-specific data can override it in
* device_add()
*/
/* check whether the hub or firmware marks this port as non-removable */
if (udev->parent)
set_usb_port_removable(udev);

34
drivers/usb/core/usb-acpi.c
View File

@ -136,8 +136,8 @@ out:
static struct acpi_device *usb_acpi_find_companion(struct device *dev)
{
int port1;
struct usb_device *udev;
struct acpi_device *adev;
acpi_handle *parent_handle;
/*
@ -155,40 +155,18 @@ static struct acpi_device *usb_acpi_find_companion(struct device *dev)
*/
if (is_usb_device(dev)) {
udev = to_usb_device(dev);
port1 = udev->portnum;
if (udev->parent) {
struct usb_hub *hub;
hub = usb_hub_to_struct_hub(udev->parent);
/*
* According usb port's connect type to set usb device's
* removability.
*/
switch (hub->ports[port1 - 1]->connect_type) {
case USB_PORT_CONNECT_TYPE_HOT_PLUG:
udev->removable = USB_DEVICE_REMOVABLE;
break;
case USB_PORT_CONNECT_TYPE_HARD_WIRED:
udev->removable = USB_DEVICE_FIXED;
break;
default:
udev->removable = USB_DEVICE_REMOVABLE_UNKNOWN;
break;
}
if (udev->parent)
return NULL;
}
/* root hub's parent is the usb hcd. */
return acpi_find_child_device(ACPI_COMPANION(dev->parent),
port1, false);
/* root hub is only child (_ADR=0) under its parent, the HC */
adev = ACPI_COMPANION(dev->parent);
return acpi_find_child_device(adev, 0, false);
} else if (is_usb_port(dev)) {
struct usb_port *port_dev = to_usb_port(dev);
struct acpi_device *adev = NULL;
int port1 = port_dev->portnum;
/* Get the struct usb_device point of port's hub */
udev = to_usb_device(dev->parent->parent);
port1 = port_dev->portnum;
/*
* The root hub ports' parent is the root hub. The non-root-hub