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thunderbolt: Allow passing NULL to tb_ctl_free()

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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.shevchenko@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Andreas Noever <andreas.noever@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mika Westerberg 2017-06-06 15:24:59 +03:00 committed by Greg Kroah-Hartman
parent da2da04b8d
commit c9843ebbb8
1 changed files with 4 additions and 0 deletions
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4
drivers/thunderbolt/ctl.c
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@ -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)