thunderbolt: Use const qualifier for `ring_interrupt_index`
commit 1716efdb07
upstream.
`ring_interrupt_index` doesn't change the data for `ring` so mark it as
const. This is needed by the following patch that disables interrupt
auto clear for rings.
Cc: Sanju Mehta <Sanju.Mehta@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -30,7 +30,7 @@
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#define NHI_MAILBOX_TIMEOUT 500 /* ms */
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static int ring_interrupt_index(struct tb_ring *ring)
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static int ring_interrupt_index(const struct tb_ring *ring)
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{
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int bit = ring->hop;
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if (!ring->is_tx)
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