CVS commit: [netbsd-4] src/sys/arch/xen/x86

[Jeff Rizzo <riz%netbsd.org@localhost>]

Module Name:    src
Committed By:   riz
Date:           Sun Jun 13 05:48:58 UTC 2010

Modified Files:
        src/sys/arch/xen/x86 [netbsd-4]: xen_bus_dma.c

Log Message:
Pull up following revision(s) (requested by jym in ticket #1388):
        sys/arch/xen/x86/xen_bus_dma.c: revision 1.20
Although Xen's documentation states that the address_bits field is not used
by XENMEM_decrease_reservation, it is checked by the hypervisor. In certain
circumstances (stack leak), the field could have an improper value, leading
to a fail of the hypercall.
Set it to 0 ("no addressing restriction") to avoid that.
Patch tested by Sam Fourman and haad@.
This should fix the rare "failed allocating DMA memory" encountered
under NetBSD dom0. Will ask for a pull-up.


To generate a diff of this commit:
cvs rdiff -u -r1.8 -r1.8.6.1 src/sys/arch/xen/x86/xen_bus_dma.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.