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UPSTREAM: usb: hub: identify the hub-device to usb_hub_reset_devices 

When usb_hub_reset_devices is called, it should be passed both an
indicator which hub it should operate on and what port number (local
to that hub) should be reset.

Previously, the usb_hub.c code did not include such context and
always started resets from port number 1, performing multiple
reset-requests for the same devices:

       /*
        * Reset any devices that may be in a bad state when applying
        * the power.  This is a __weak function.  Resetting of the devices
        * should occur in the board file of the device.
        */
       for (i = 0; i < dev->maxchild; i++)
              usb_hub_reset_devices(i + 1);

This adds an additional 'hub' parameter to usb_hub_reset_devices
that provides the context to fully qualify the port-number in.

Existing implementations are changed to accept and ignore the new
parameter.

Change-Id: I2f201cb9c52522f6e553cbf54aae9bbb2e549a21
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Tested-by: Jakob Unterwurzacher <jakob.unterwurzacher@theobroma-systems.com>
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
(cherry picked from commit 883946e8e7c5dacb5e12f18703e20d49a4886f0e)
This commit is contained in:
Philipp Tomsich 2017-11-22 17:15:17 +01:00 committed by Kever Yang
parent 1bee64cb36
commit 3f6e9bd9ff
3 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
board/compulab/cm_t54/cm_t54.c
View File

@ -246,7 +246,7 @@ int ehci_hcd_stop(void)
return ret;
}
void usb_hub_reset_devices(int port)
void usb_hub_reset_devices(struct usb_hub_device *hub, int port)
{
/* The LAN9730 needs to be reset after the port power has been set. */
if (port == 3) {

2
board/ti/omap5_uevm/evm.c
View File

@ -249,7 +249,7 @@ int ehci_hcd_stop(void)
return omap_ehci_hcd_stop();
}
void usb_hub_reset_devices(int port)
void usb_hub_reset_devices(struct usb_hub_device *hub, int port)
{
/* The LAN9730 needs to be reset after the port power has been set. */
if (port == 3) {

4
common/usb_hub.c
View File

@ -57,7 +57,7 @@ struct usb_device_scan {
static LIST_HEAD(usb_scan_list);
__weak void usb_hub_reset_devices(int port)
__weak void usb_hub_reset_devices(struct usb_hub_device *hub, int port)
{
return;
}
@ -853,7 +853,7 @@ static int usb_hub_configure(struct usb_device *dev)
* should occur in the board file of the device.
*/
for (i = 0; i < dev->maxchild; i++)
usb_hub_reset_devices(i + 1);
usb_hub_reset_devices(hub, i + 1);
/*
* Only add the connected USB devices, including potential hubs,