[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>

diff --git a/arch/ia64/sn/kernel/sn2/sn_hwperf.c b/arch/ia64/sn/kernel/sn2/sn_hwperf.c
index 4c7e747..55ac3c4 100644 (file)
--- 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;