[PATCH v3 07/27] thunderbolt: Allow passing NULL to tb_ctl_free()

[Mika Westerberg]

Following the usual pattern used in many places, we allow passing NULL
pointer to tb_ctl_free(). Then the user can call the function regardless
if it has allocated control channel or not making the code bit simpler.

Suggested-by: Andy Shevchenko <andriy.shevche...@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerb...@linux.intel.com>
---
 drivers/thunderbolt/ctl.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/thunderbolt/ctl.c b/drivers/thunderbolt/ctl.c
index 889a32dd21e7..f8290a577b2b 100644
--- a/drivers/thunderbolt/ctl.c
+++ b/drivers/thunderbolt/ctl.c
@@ -520,6 +520,10 @@ struct tb_ctl *tb_ctl_alloc(struct tb_nhi *nhi, hotplug_cb 
cb, void *cb_data)
 void tb_ctl_free(struct tb_ctl *ctl)
 {
        int i;
+
+       if (!ctl)
+               return;
+
        if (ctl->rx)
                ring_free(ctl->rx);
        if (ctl->tx)
-- 
2.11.0