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thunderbolt: Fix bandwidth group reservation indexing

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Valid bandwidth group IDs range from 1 through MAX_GROUPS, while Group
ID 0 is reserved. tb_consumed_dp_bandwidth() uses the Group ID directly
to index its local group_reserved[] array.

The array currently has MAX_GROUPS entries, so its valid indices are 0
through MAX_GROUPS - 1. Group ID MAX_GROUPS therefore accesses one
element past the end, and the final group's reserved bandwidth is not
included when the array is summed.

Give group_reserved[] MAX_GROUPS + 1 entries so direct Group ID
indexing covers the reserved ID 0 and valid IDs 1 through MAX_GROUPS.

Fixes: 52a4490e89 ("thunderbolt: Reserve released DisplayPort bandwidth for a group for 10 seconds")
Cc: stable@vger.kernel.org
Signed-off-by: Xu Rao <raoxu@uniontech.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This commit is contained in:
Xu Rao
2026-06-24 14:27:03 +08:00
committed by Mika Westerberg
parent 97b228e596
commit d2ee4d47aa
1 changed files with 1 additions and 1 deletions
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2
drivers/thunderbolt/tb.c
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@@ -609,7 +609,7 @@ static int tb_consumed_dp_bandwidth(struct tb *tb,
int *consumed_up,
int *consumed_down)
{
int group_reserved[MAX_GROUPS] = {};
int group_reserved[MAX_GROUPS + 1] = {};
struct tb_cm *tcm = tb_priv(tb);
struct tb_tunnel *tunnel;
bool downstream;