CRIS v32: Should index be positive?

`port' is used as index for writing to pins during
allocation/deallocation. It should be positive.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/cris/arch-v32/mach-a3/pinmux.c b/arch/cris/arch-v32/mach-a3/pinmux.c
index 0a28c9bedfb..18648ef2d87 100644
--- a/arch/cris/arch-v32/mach-a3/pinmux.c
+++ b/arch/cris/arch-v32/mach-a3/pinmux.c
@@ -242,7 +242,7 @@ crisv32_pinmux_dealloc(int port, int first_pin, int last_pin)
 
         crisv32_pinmux_init();
 
-        if (port > PORTS)
+        if (port > PORTS || port < 0)
                 return -EINVAL;
 
         spin_lock_irqsave(&pinmux_lock, flags);