Hello All,
We are working on OMAP4430 based board which has EHCI and OHCI ports and
are testing OHCI functionality. We are using kernel-3.4.
When the USB bus is in suspend, a device connected to OHCI port does
not get detected, whereas the device connected to EHCI port is getting detected.
We are testing using the below commands:
echo enabled > /sys/bus/usb/devices/usb2/power/wakeup
echo enabled > /sys/bus/usb/devices/2-2/power/wakeup
echo auto > /sys/bus/usb/devices/usb2/power/control
echo auto > /sys/bus/usb/devices/2-2/power/control
We see that after making the below change in "ohci_irq", the device
gets detected.
---------------------------------------------------------------------------------------------------
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -819,7 +819,7 @@ static irqreturn_t ohci_irq (struct usb_hcd *hcd)
* to turn on RHSC along with RD. But for remote wakeup events
* this might not happen.
*/
- else if (ints & OHCI_INTR_RD) {
+ if (ints & OHCI_INTR_RD) {
---------------------------------------------------------------------------------------------------
Even in the OHCI specification (Sec 5.3 page 80), it is recommended to
check individual bits
(RHSC and RD).
Can you please let us know if this change is valid and will not cause
any regression?
Thanks,
Mohan
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