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Bluetooth: ATT: Rework buffer pools to minimize extra data

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This uses net_buf_simple_{save/restore} so the same buffer can be reused
if the buffer needs to be resent, also since the responses don't need to
be saved a pool with 1 element is enough while it keeps the code safe
from deadlocking when both request and responses use the same pool.

Change-Id: Ibaa8e7ef39f4b466d5cd4d55874bd609f0a1d67c
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This commit is contained in:
Luiz Augusto von Dentz 2016-10-31 12:53:43 +02:00 • committed by Johan Hedberg
commit 07c8be1791
3 changed files with 26 additions and 60 deletions
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11
include/bluetooth/att.h
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@ -57,12 +57,13 @@ typedef void (*bt_att_destroy_t)(void *user_data);
/* ATT request context */
struct bt_att_req {
sys_snode_t node;
bt_att_func_t func;
bt_att_destroy_t destroy;
struct net_buf *buf;
sys_snode_t node;
bt_att_func_t func;
bt_att_destroy_t destroy;
struct net_buf_simple_state state;
struct net_buf *buf;
#if defined(CONFIG_BLUETOOTH_SMP)
bool retrying;
bool retrying;
#endif /* CONFIG_BLUETOOTH_SMP */
};