> -----Original Message----- > From: David Brownell [mailto:[EMAIL PROTECTED] > Sent: Friday, May 18, 2007 6:49 PM > To: Andrew Morton > Cc: Stefan Meyer; linux-usb-devel@lists.sourceforge.net; Alan Stern; Greg KH; > [EMAIL PROTECTED]; Natalie Protasevich; Li Yang-r58472 > Subject: Re: [Bulk] Re: [Bugme-new] [Bug 7482] New: usb ehci driver crash on system > with more tahn 256MByte memory > > On Friday 18 May 2007, Andrew Morton wrote: > > On Fri, 10 Nov 2006 00:47:59 -0800 David Brownell <[EMAIL PROTECTED]> wrote: > > > > > On Thursday 09 November 2006 11:56 pm, Stefan Meyer wrote: > > > > > > > Changing it to 0x0000001C creates a 512MByte windows (this was of course a > > > > non-generic quick fix). > > > > Running with anything up to 256MByte is fine. > > > > My system has 512MByte and it took quite a bit of chasing to find this > > > > issue. > > > > > > A better patch would (a) fix the comment which says both lines of > > > code affects the PHY, (b) not hard-wire the amount of memory on > > > the system. > > > > > > Assuming it's possible to put non-cacheable memory into that chunk > > > of address space (memory mapped peripherals etc) then it's dangerous > > > to hard-wire _any_ value. > > > > > > > So, did this ever get fixed? (Full history at > > http://bugzilla.kernel.org/show_bug.cgi?id=7482) > > Not from what I can tell. I cc'd the Freescale person who seems > to be maintaining EHCI on that platform ...
I see. The complete fix that I expect is to set snooping on the whole 4G memory space as fsl_usb2_udc did. Also, we need to take care of the case that the Soc used on architectures other than powerpc which don't have snooping mechanism. Shall I provide a patch to fix this? - Leo ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
