Am Montag, den 14.04.2014, 13:58 -0400 schrieb Alan Stern: > On Mon, 14 Apr 2014, Stefani Seibold wrote: > > > > > An other PowerPC device which is nearly eactly the same HW but without > > > > this USB HUB works perfectly. > > > > > > Maybe you should replace that hub with a different brand. > > > > > > > Thats not possible, because the Hub is soldered on the board. And it is > > also not a HW issue, since the Hub works perfectly which all previous > > kernels including 3.4. > > One other thing you can try is to increase the reset timeout in > drivers/usb/host/ehci-hub.c. This is under the USB_PORT_FEAT_RESET > case in ehci_hub_control(), around line 1225: > > /* > * caller must wait, then call GetPortStatus > * usb 2.0 spec says 50 ms resets on root > */ > ehci->reset_done [wIndex] = jiffies > + msecs_to_jiffies (50); > > Increasing the 50 to 100 or more might help. > > Alan Stern > I tried this, when i increase the value to 1000, the reset and enumeration process will be faster after a kexec: 28 Seconds vs. 162 Seconds. - Stefani -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
