6.12-stable review patch. If anyone has any objections, please let me know.
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From: Chandrashekar Devegowda chandrashekar.devegowda@intel.com
[ Upstream commit bf2ffc4d14db29cab781549912d2dc69127f4d3e ]
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 chandrashekar.devegowda@intel.com Signed-off-by: Kiran K kiran.k@intel.com Fixes: c2b636b3f788 ("Bluetooth: btintel_pcie: Add support for PCIe transport") Signed-off-by: Luiz Augusto von Dentz luiz.von.dentz@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- 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 c02d671396e24..34812bf7587d6 100644 --- a/drivers/bluetooth/btintel_pcie.c +++ b/drivers/bluetooth/btintel_pcie.c @@ -233,7 +233,11 @@ 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;