[PATCH] tile: array underflow in setup_maxnodemem()

[Dan Carpenter]

My static checker correctly complains that we should have a lower bound
on "node" to prevent an array underflow.

Fixes: 867e359b97c9 ("arch/tile: core support for Tilera 32-bit chips.")
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>

diff --git a/arch/tile/kernel/setup.c b/arch/tile/kernel/setup.c
index 443a70bccc1c..b1474e7d9afb 100644
--- a/arch/tile/kernel/setup.c
+++ b/arch/tile/kernel/setup.c
@@ -140,7 +140,7 @@ static int __init setup_maxnodemem(char *str)
 {
        char *endp;
        unsigned long long maxnodemem;
-       long node;
+       unsigned long node;
 
        node = str ? simple_strtoul(str, &endp, 0) : INT_MAX;
        if (node >= MAX_NUMNODES || *endp != ':')