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fix(ble/bluedroid): preserve ATT error on prepare write completion

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Skip prepare-write echo validation when the GATT stack reports a
non-success status. ATT Error Response carries no prepare-write echo
body (rsp_len=0), so the check incorrectly overwrote errors such as
GATT_INSUF_AUTHENTICATION (0x05) with GATT_INVALID_PDU (0x04).


(cherry picked from commit d5b9350d0f)

Co-authored-by: zhanghaipeng <zhanghaipeng@espressif.com>
This commit is contained in:
Zhang Hai Peng
2026-06-26 20:23:38 +08:00
parent 4bf3d52183
commit f00c216ce2
1 changed files with 3 additions and 2 deletions
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5
components/bt/host/bluedroid/bta/gatt/bta_gattc_act.c
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@@ -1486,8 +1486,9 @@ void bta_gattc_write_cmpl(tBTA_GATTC_CLCB *p_clcb, tBTA_GATTC_OP_CMPL *p_data)
( *p_clcb->p_rcb->p_cback)(BTA_GATTC_PREP_WRITE_EVT, (tBTA_GATTC *)&cb_data);
return;
}
/* Rsp value is one ATT chunk (<= MTU-5), not necessarily full api_write.len. */
{
/* Rsp value is one ATT chunk (<= MTU-5), not necessarily full api_write.len.
* Only validate echo on success; ATT Error Response has no prepare-write body. */
if (p_data->status == BTA_GATT_OK) {
UINT16 rsp_len = p_data->p_cmpl->att_value.len;
UINT16 req_len = p_clcb->p_q_cmd->api_write.len;
tGATT_VALUE *a = &p_data->p_cmpl->att_value;