CVS commit: src/sys/arch/xen/x86

[Jean-Yves Migeon <jym%netbsd.org@localhost>]

Module Name:    src
Committed By:   jym
Date:           Tue Mar  9 23:12:06 UTC 2010

Modified Files:
        src/sys/arch/xen/x86: xen_bus_dma.c

Log Message:
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 -r1.19 -r1.20 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.