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thunderbolt: Allow passing NULL to tb_ctl_free()
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>
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@ -520,6 +520,10 @@ err:
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void tb_ctl_free(struct tb_ctl *ctl)
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{
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int i;
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if (!ctl)
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return;
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if (ctl->rx)
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ring_free(ctl->rx);
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if (ctl->tx)
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