thunderbolt: Make tb_sw_write() take const parameter

The function does not modify the argument in any way so make it const.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>

diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h
index 1565af2..455ca49 100644 (file)
--- a/drivers/thunderbolt/tb.h
+++ b/drivers/thunderbolt/tb.h
@@ -399,7 +399,7 @@ static inline int tb_sw_read(struct tb_switch *sw, void *buffer,
                           length);
 }
 
-static inline int tb_sw_write(struct tb_switch *sw, void *buffer,
+static inline int tb_sw_write(struct tb_switch *sw, const void *buffer,
                              enum tb_cfg_space space, u32 offset, u32 length)
 {
        if (sw->is_unplugged)