From bf2ffc4d14db29cab781549912d2dc69127f4d3e Mon Sep 17 00:00:00 2001 From: Chandrashekar Devegowda Date: Tue, 3 Jun 2025 15:34:40 +0530 Subject: [PATCH] Bluetooth: btintel_pcie: Reduce driver buffer posting to prevent race condition Modify the driver to post 3 fewer buffers than the maximum rx buffers (64) allowed for the firmware. This change mitigates a hardware issue causing a race condition in the firmware, improving stability and data handling. Signed-off-by: Chandrashekar Devegowda Signed-off-by: Kiran K Fixes: c2b636b3f788 ("Bluetooth: btintel_pcie: Add support for PCIe transport") Signed-off-by: Luiz Augusto von Dentz --- drivers/bluetooth/btintel_pcie.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/bluetooth/btintel_pcie.c b/drivers/bluetooth/btintel_pcie.c index 03f13de4a723..563165c5efae 100644 --- a/drivers/bluetooth/btintel_pcie.c +++ b/drivers/bluetooth/btintel_pcie.c @@ -398,7 +398,11 @@ static int btintel_pcie_start_rx(struct btintel_pcie_data *data) int i, ret; struct rxq *rxq = &data->rxq; - for (i = 0; i < rxq->count; i++) { + /* Post (BTINTEL_PCIE_RX_DESCS_COUNT - 3) buffers to overcome the + * hardware issues leading to race condition at the firmware. + */ + + for (i = 0; i < rxq->count - 3; i++) { ret = btintel_pcie_submit_rx(data); if (ret) return ret; -- 2.25.1