In patch 2e2aa1bc7eff90ecm, USB suspend and wakeup control requests are
passed to SFR_OHCIICR register. If a processor does not have such a
register, this hub control request will be dropped.
If no such a SFR register is available, all USB suspend control requests
will now be processed using ohci_hub_control()
(like before patch 2e2aa1bc7eff90ecm.)
Tested on an Atmel AT91SAM9G20 with an on-board TI TUSB2046B hub chip
If the last USB device is unplugged from the USB hub, the hub goes into
sleep and will not wakeup when an USB devices is inserted.
Fixes: 2e2aa1bc7eff90ec ("usb: ohci-at91: Forcibly suspend ports while USB
suspend")
Signed-off-by: Jelle Martijn Kok <[email protected]>
Tested-by: Wenyou Yang <[email protected]>
Cc: Wenyou Yang <[email protected]>
Cc: Alexandre Belloni <[email protected]>
Cc: Nicolas Ferre <[email protected]>
Cc: Alan Stern <[email protected]>
---
drivers/usb/host/ohci-at91.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c
index b38a228..af0566d 100644
--- a/drivers/usb/host/ohci-at91.c
+++ b/drivers/usb/host/ohci-at91.c
@@ -361,7 +361,7 @@ static int ohci_at91_hub_control(struct usb_hcd *hcd, u16
typeReq, u16 wValue,
case USB_PORT_FEAT_SUSPEND:
dev_dbg(hcd->self.controller, "SetPortFeat: SUSPEND\n");
- if (valid_port(wIndex)) {
+ if (valid_port(wIndex) && ohci_at91->sfr_regmap) {
ohci_at91_port_suspend(ohci_at91->sfr_regmap,
1);
return 0;
@@ -404,7 +404,7 @@ static int ohci_at91_hub_control(struct usb_hcd *hcd, u16
typeReq, u16 wValue,
case USB_PORT_FEAT_SUSPEND:
dev_dbg(hcd->self.controller, "ClearPortFeature:
SUSPEND\n");
- if (valid_port(wIndex)) {
+ if (valid_port(wIndex) && ohci_at91->sfr_regmap) {
ohci_at91_port_suspend(ohci_at91->sfr_regmap,
0);
return 0;
--
2.1.4
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
