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Re: Instability issues with NetBSD-9, xen-4.11 and the xbdb backend driver

	Hello.  Here is a simple patch that I think addresses the issue I'm
seeing with the dom0 causing domu's to panic with biodon2 already errors
when errors occur with the hypervisor granting process.  I think this is
the more correct way to deal with such errors.
this makes the error handling path match in the two places where error
handling is treated.



Index: xbdback_xenbus.c
RCS file: /cvsroot/src/sys/arch/xen/xen/xbdback_xenbus.c,v
retrieving revision 1.72
diff -u -r1.72 xbdback_xenbus.c
--- xbdback_xenbus.c	7 Apr 2019 12:21:20 -0000	1.72
+++ xbdback_xenbus.c	15 Nov 2019 03:20:25 -0000
@@ -1805,7 +1805,7 @@
 		xbdback_io_error(xbdi->xbdi_io, error);
 		xbdi->xbdi_io = NULL;
-		xbdi->xbdi_cont = xbdi->xbdi_cont_aux;
+		xbdi->xbdi_cont = xbdback_co_main_incr;
 		return xbdi;

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