[PATCH] ppc32: Check return of ppc_sys_get_pdata before accessing pointer

Ensure that the returned pointer from ppc_sys_get_pdata is not NULL before we
start using it.  This handles any cases where we have variants of processors
on the same board with different functionality.

Signed-off-by: Kumar Gala <kumar.gala@freescale.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 16 insertions, 12 deletions

diff --git a/arch/ppc/platforms/83xx/mpc834x_sys.c b/arch/ppc/platforms/83xx/mpc834x_sys.c
index 37ece154279..ddd04d4c1ea 100644
--- a/arch/ppc/platforms/83xx/mpc834x_sys.c
+++ b/arch/ppc/platforms/83xx/mpc834x_sys.c
@@ -94,20 +94,24 @@ mpc834x_sys_setup_arch(void)
 
         /* setup the board related information for the enet controllers */
         pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC83xx_TSEC1);
-        pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR;
-        pdata->interruptPHY = MPC83xx_IRQ_EXT1;
-        pdata->phyid = 0;
-        /* fixup phy address */
-        pdata->phy_reg_addr += binfo->bi_immr_base;
-        memcpy(pdata->mac_addr, binfo->bi_enetaddr, 6);
+        if (pdata) {
+                pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR;
+                pdata->interruptPHY = MPC83xx_IRQ_EXT1;
+                pdata->phyid = 0;
+                /* fixup phy address */
+                pdata->phy_reg_addr += binfo->bi_immr_base;
+                memcpy(pdata->mac_addr, binfo->bi_enetaddr, 6);
+        }
 
         pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC83xx_TSEC2);
-        pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR;
-        pdata->interruptPHY = MPC83xx_IRQ_EXT2;
-        pdata->phyid = 1;
-        /* fixup phy address */
-        pdata->phy_reg_addr += binfo->bi_immr_base;
-        memcpy(pdata->mac_addr, binfo->bi_enet1addr, 6);
+        if (pdata) {
+                pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR;
+                pdata->interruptPHY = MPC83xx_IRQ_EXT2;
+                pdata->phyid = 1;
+                /* fixup phy address */
+                pdata->phy_reg_addr += binfo->bi_immr_base;
+                memcpy(pdata->mac_addr, binfo->bi_enet1addr, 6);
+        }
 
 #ifdef CONFIG_BLK_DEV_INITRD
         if (initrd_start)