[IA64] unsigned cannot be less than 0 in sn_hwperf_ioctl()

struct sn_hwperf_ioctl_args member arg (u64) cannot be less than 0.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/arch/ia64/sn/kernel/sn2/sn_hwperf.c b/arch/ia64/sn/kernel/sn2/sn_hwperf.c
index 4c7e74790958..55ac3c4e11d2 100644
--- a/arch/ia64/sn/kernel/sn2/sn_hwperf.c
+++ b/arch/ia64/sn/kernel/sn2/sn_hwperf.c
@@ -786,17 +786,18 @@ sn_hwperf_ioctl(struct inode *in, struct file *fp, u32 op, unsigned long arg)
                 break;
 
         case SN_HWPERF_GET_OBJ_NODE:
-                if (a.sz != sizeof(u64) || a.arg < 0) {
+                i = a.arg;
+                if (a.sz != sizeof(u64) || i < 0) {
                         r = -EINVAL;
                         goto error;
                 }
                 if ((r = sn_hwperf_enum_objects(&nobj, &objs)) == 0) {
-                        if (a.arg >= nobj) {
+                        if (i >= nobj) {
                                 r = -EINVAL;
                                 vfree(objs);
                                 goto error;
                         }
-                        if (objs[(i = a.arg)].id != a.arg) {
+                        if (objs[i].id != a.arg) {
                                 for (i = 0; i < nobj; i++) {
                                         if (objs[i].id == a.arg)
                                                 break;