--- a/drivers/usb/host/adm5120-dbg.c
+++ b/drivers/usb/host/adm5120-dbg.c
@@ -133,7 +133,7 @@ urb_print(struct admhcd *ahcd, struct ur
#define admhc_dbg_sw(ahcd, next, size, format, arg...) \
do { \
- if (next) { \
+ if (next != NULL) { \
unsigned s_len; \
s_len = scnprintf(*next, *size, format, ## arg); \
*size -= s_len; *next += s_len; \
