On Tue, 22 Oct 2002, Pete Zaitcev wrote:
| Out of the blue an ALi engineer contacted me and offered a fix for
| lockups in IBM i-series laptops (RH Bugzilla #50225). I would
| really appreciate if someone ran it on their _regular_ ohci
| to ensure that it does not break non-ALi silicon. Both 2.4 and 2.5
| are the same (approximately), the patch is against 2.4.
Hi Pete-
Ah, good to see some help from silicon mfrs.
I tested in on vanilla 2.4.19 (applied patch by hand).
Is that OK for you?
My OHCI adapter is Lucent QuadraBus.
I used a keyboard with the hid driver and a USB hard drive
with usb-storage. Both worked fine in limited testing.
I played an mp3 file from the hard disk. Good music. (The Who :)
HTH.
~Randy
| --- linux-2.4.19/drivers/usb/usb-ohci.c 2002-08-02 17:39:45.000000000 -0700
| +++ linux-2.4.19-p3/drivers/usb/usb-ohci.c 2002-10-22 10:29:03.000000000 -0700
| @@ -12,6 +12,7 @@
| *
| * History:
| *
| + * 2002/10/22 OHCI_USB_OPER for ALi lockup in IBM i1200 (ALEX <thchou@ali>)
| * 2002/03/08 interrupt unlink fix (Matt Hughes), better cleanup on
| * load failure (Matthew Frederickson)
| * 2002/01/20 async unlink fixes: return -EINPROGRESS (per spec) and
| @@ -2165,7 +2166,11 @@
|
| /* Reset USB (needed by some controllers) */
| writel (0, &ohci->regs->control);
| -
| +
| + /* Force a state change from USBRESET to USBOPERATIONAL for ALi */
| + (void) readl (&ohci->regs->control); /* PCI posting */
| + writel (ohci->hc_control = OHCI_USB_OPER, &ohci->regs->control);
| +
| /* HC Reset requires max 10 ms delay */
| writel (OHCI_HCR, &ohci->regs->cmdstatus);
| while ((readl (&ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
|
|
| -------------------------------------------------------
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