[IA64] Handle count==0 in sn2_ptc_proc_write()

[linux-2.6-omap-h63xx.git] / arch / ia64 / sn / kernel / sn2 / sn2_smp.c

diff --git a/arch/ia64/sn/kernel/sn2/sn2_smp.c b/arch/ia64/sn/kernel/sn2/sn2_smp.c
index 6dd886c5d860a29dd71b7c91a168728ff97b4611..e585f9a2afb936c74f9ec0ceea13beb1ef7271c4 100644 (file)
--- a/arch/ia64/sn/kernel/sn2/sn2_smp.c
+++ b/arch/ia64/sn/kernel/sn2/sn2_smp.c
@@ -512,7 +512,7 @@ static ssize_t sn2_ptc_proc_write(struct file *file, const char __user *user, si
        int cpu;
        char optstr[64];
 
-       if (count > sizeof(optstr))
+       if (count == 0 || count > sizeof(optstr))
                return -EINVAL;
        if (copy_from_user(optstr, user, count))
                return -EFAULT;