> Here is a proposed patch. I haven't tried running it, but it compiles > okay.
Looks about right, too; thanks. Minor comments: > --- usb-2.6.orig/drivers/usb/core/hcd.h > +++ usb-2.6/drivers/usb/core/hcd.h > @@ -470,5 +472,9 @@ static inline void usbmon_urb_complete(s > : (in_interrupt () ? "in_interrupt" : "can sleep")) > > > -#endif /* __KERNEL__ */ > +/* Mutual exclusion for EHCI CF initialization. This interferes with > + * port reset on some companion controllers. > + */ > +extern struct rw_semaphore ehci_cf_port_reset_rwsem; You have two copies of that comment; I'd drop this one, and add a better one around CF initialization. What I'd have here is a comment that this symbol is exported ONLY for use by the EHCI driver, trespassers will be violated, etc. > --- usb-2.6.orig/drivers/usb/host/ehci-hcd.c > +++ usb-2.6/drivers/usb/host/ehci-hcd.c > @@ -646,9 +646,11 @@ static int ehci_run (struct usb_hcd *hcd > * involved with the root hub. (Except where one is integrated, > * and there's no companion controller unless maybe for USB OTG.) > */ > + down_write(&ehci_cf_port_reset_rwsem); > hcd->state = HC_STATE_RUNNING; > ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag); > ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ > + up_write(&ehci_cf_port_reset_rwsem); That deserves a comment about how CF and companion port resets don't mix well. ... assuming this does check out as the problem, which I expect it will. - Dave > > temp = HC_VERSION(ehci_readl(ehci, &ehci->caps->hc_capbase)); > ehci_info (ehci, > ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Linux-usb-users@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
