[POWERPC] mpc5200: Fix null dereference if bestcomm fails to initialize
If the bestcomm initialization fails, calls to the task allocate
function should fail gracefully instead of oopsing with a NULL deref.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/sysdev/bestcomm/bestcomm.c b/arch/powerpc/sysdev/bestcomm/bestcomm.c
index f589999..b18cab5 100644
--- a/arch/powerpc/sysdev/bestcomm/bestcomm.c
+++ b/arch/powerpc/sysdev/bestcomm/bestcomm.c
@@ -52,6 +52,10 @@
int i, tasknum = -1;
struct bcom_task *tsk;
+ /* Don't try to do anything if bestcomm init failed */
+ if (!bcom_eng)
+ return NULL;
+
/* Get and reserve a task num */
spin_lock(&bcom_eng->lock);
