svn commit: r323549 - head/sys/dev/intpm

[Conrad Meyer]

Author: cem
Date: Wed Sep 13 16:23:59 2017
New Revision: 323549
URL: https://svnweb.freebsd.org/changeset/base/323549

Log:
  intpm(4): Do not attach if io_res can not be allocated
  
  Attempts to use the driver without an io_res result in immediate panic.
  
  Sponsored by:	Dell EMC Isilon

Modified:
  head/sys/dev/intpm/intpm.c

Modified: head/sys/dev/intpm/intpm.c
==============================================================================
--- head/sys/dev/intpm/intpm.c	Wed Sep 13 16:21:11 2017	(r323548)
+++ head/sys/dev/intpm/intpm.c	Wed Sep 13 16:23:59 2017	(r323549)
@@ -191,6 +191,10 @@ sb8xx_attach(device_t dev)
 	}
 	sc->io_res = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &sc->io_rid,
 	    RF_ACTIVE);
+	if (sc->io_res == NULL) {
+		device_printf(dev, "Could not allocate I/O space\n");
+		return (ENXIO);
+	}
 	sc->poll = 1;
 	return (0);
 }