svn commit: r269770 - head/sys/dev/ofw

Ian Lepore ian at FreeBSD.org
Sun Aug 10 00:30:13 UTC 2014


Author: ian
Date: Sun Aug 10 00:30:12 2014
New Revision: 269770
URL: http://svnweb.freebsd.org/changeset/base/269770

Log:
  Handle various ways that interrupt config data can be malformed by
  warning and assuming more or less reasonable values.

Modified:
  head/sys/dev/ofw/ofwbus.c

Modified: head/sys/dev/ofw/ofwbus.c
==============================================================================
--- head/sys/dev/ofw/ofwbus.c	Sun Aug 10 00:23:57 2014	(r269769)
+++ head/sys/dev/ofw/ofwbus.c	Sun Aug 10 00:30:12 2014	(r269770)
@@ -435,6 +435,7 @@ ofwbus_setup_dinfo(device_t dev, phandle
 {
 	struct ofwbus_softc *sc;
 	struct ofwbus_devinfo *ndi;
+	const char *nodename;
 	uint32_t *reg, *intr, icells;
 	uint64_t phys, size;
 	phandle_t iparent;
@@ -449,8 +450,8 @@ ofwbus_setup_dinfo(device_t dev, phandle
 		free(ndi, M_DEVBUF);
 		return (NULL);
 	}
-	if (OFWBUS_EXCLUDED(ndi->ndi_obdinfo.obd_name,
-	    ndi->ndi_obdinfo.obd_type)) {
+	nodename = ndi->ndi_obdinfo.obd_name;
+	if (OFWBUS_EXCLUDED(nodename, ndi->ndi_obdinfo.obd_type)) {
 		ofw_bus_gen_destroy_devinfo(&ndi->ndi_obdinfo);
 		free(ndi, M_DEVBUF);
 		return (NULL);
@@ -463,7 +464,7 @@ ofwbus_setup_dinfo(device_t dev, phandle
 	if (nreg % (sc->acells + sc->scells) != 0) {
 		if (bootverbose)
 			device_printf(dev, "Malformed reg property on <%s>\n",
-			    ndi->ndi_obdinfo.obd_name);
+			    nodename);
 		nreg = 0;
 	}
 
@@ -487,11 +488,24 @@ ofwbus_setup_dinfo(device_t dev, phandle
 	nintr = OF_getencprop_alloc(node, "interrupts",  sizeof(*intr),
 	    (void **)&intr);
 	if (nintr > 0) {
-		iparent = 0;
-		OF_searchencprop(node, "interrupt-parent", &iparent,
-		    sizeof(iparent));
-		OF_searchencprop(OF_xref_phandle(iparent), "#interrupt-cells",
-		    &icells, sizeof(icells));
+		if (OF_searchencprop(node, "interrupt-parent", &iparent,
+		    sizeof(iparent)) == -1) {
+			device_printf(dev, "No interrupt-parent found, "
+			    "assuming nexus on <%s>\n", nodename);
+			iparent = 0xffffffff;
+		}
+		if (OF_searchencprop(OF_xref_phandle(iparent), 
+		    "#interrupt-cells", &icells, sizeof(icells)) == -1) {
+			device_printf(dev, "Missing #interrupt-cells property, "
+			    "assuming <1> on <%s>\n", nodename);
+			icells = 1;
+		}
+		if (icells < 1 || icells > nintr) {
+			device_printf(dev, "Invalid #interrupt-cells property "
+			    "value <%d>, assuming <1> on <%s>\n", icells, 
+			    nodename);
+			icells = 1;
+		}
 		for (i = 0, rid = 0; i < nintr; i += icells, rid++) {
 			intr[i] = ofw_bus_map_intr(dev, iparent, icells,
 			    &intr[i]);


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