[PATCH 1/2] thunderbolt: Use const qualifier for `ring_interrupt_index`

[Mario Limonciello]

`ring_interrupt_index` doesn't change the data for `ring` so
mark it as const.

Cc: Sanju Mehta <Sanju.Mehta@xxxxxxx>
Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
---
 drivers/thunderbolt/nhi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/thunderbolt/nhi.c b/drivers/thunderbolt/nhi.c
index 4dce2edd86ea0..fdc0c3ba2ef01 100644
--- a/drivers/thunderbolt/nhi.c
+++ b/drivers/thunderbolt/nhi.c
@@ -46,7 +46,7 @@
 #define QUIRK_AUTO_CLEAR_INT	BIT(0)
 #define QUIRK_E2E		BIT(1)
 
-static int ring_interrupt_index(struct tb_ring *ring)
+static int ring_interrupt_index(const struct tb_ring *ring)
 {
 	int bit = ring->hop;
 	if (!ring->is_tx)
-- 
2.25.1