[Skiboot] [PATCH] PLAT: Use NULL check instead assertion

[Neelesh Gupta]

There could be some processor chips not populated in the system.
So, if we are not able to get chip data of given chip id, we should
just move on to the next or return instead of aborting (bz 120562).

Signed-off-by: Neelesh Gupta <neelegup at linux.vnet.ibm.com>
---
 platforms/ibm-fsp/firenze.c |   42 +++++++++++++++++++++++++-----------------
 1 file changed, 25 insertions(+), 17 deletions(-)

diff --git a/platforms/ibm-fsp/firenze.c b/platforms/ibm-fsp/firenze.c
index d971d57..258a6b3 100644
--- a/platforms/ibm-fsp/firenze.c
+++ b/platforms/ibm-fsp/firenze.c
@@ -130,29 +130,37 @@ static void firenze_dt_fixup_i2cm(void)
 	case LX_VPD_SHARK_BACKPLANE: /* XXX confirm ? */
 		/* i2c nodes on chip 0x10 */
 		c = get_chip(0x10);
-		assert(c);
-
-		/* Engine 1 */
-		master = dt_create_i2c_master(c->devnode, 1);
-		assert(master);
-		snprintf(name, sizeof(name), "p8_%08x_e%dp%d", c->id, 1, 0);
-		bus = dt_create_i2c_bus(master, name, 0);
-		assert(bus);
-		dev = dt_create_i2c_device(bus, 0x39, "power-control",
-					   "maxim,5961", "pcie-hotplug");
-		assert(dev);
-		dt_add_property_strings(dev, "target-list", "slot-C4", "slot-C5");
+		if (c) {
+			/* Engine 1 */
+			master = dt_create_i2c_master(c->devnode, 1);
+			assert(master);
+			snprintf(name, sizeof(name), "p8_%08x_e%dp%d", c->id, 1, 0);
+			bus = dt_create_i2c_bus(master, name, 0);
+			assert(bus);
+			dev = dt_create_i2c_device(bus, 0x39, "power-control",
+						   "maxim,5961", "pcie-hotplug");
+			assert(dev);
+			dt_add_property_strings(dev, "target-list", "slot-C4",
+						"slot-C5");
+
+			dev = dt_create_i2c_device(bus, 0x3a, "power-control",
+						   "maxim,5961", "pcie-hotplug");
+			assert(dev);
+			dt_add_property_strings(dev, "target-list", "slot-C2",
+						"slot-C3");
+		} else {
+			prlog(PR_INFO, "PLAT: Chip not found for the id 0x10\n");
+		}
 
-		dev = dt_create_i2c_device(bus, 0x3a, "power-control",
-					   "maxim,5961", "pcie-hotplug");
-		assert(dev);
-		dt_add_property_strings(dev, "target-list", "slot-C2", "slot-C3");
 	/* Fall through */
 	case LX_VPD_1S4U_BACKPLANE:
 	case LX_VPD_1S2U_BACKPLANE:
 		/* i2c nodes on chip 0 */
 		c = get_chip(0);
-		assert(c);
+		if (!c) {
+			prlog(PR_INFO, "PLAT: Chip not found for the id 0x0\n");
+			break;
+		}
 
 		/* Engine 1*/
 		master = dt_create_i2c_master(c->devnode, 1);