This is a note to let you know that I've just added the patch titled
Bluetooth: btnxpuart: Fix driver sending truncated data
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
bluetooth-btnxpuart-fix-driver-sending-truncated-dat.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 0cfebc93271d766dd75f3f185111dd3c0b86b012
Author: Neeraj Sanjay Kale <neeraj.sanjaykale@xxxxxxx>
Date: Fri Dec 20 18:32:52 2024 +0530
Bluetooth: btnxpuart: Fix driver sending truncated data
[ Upstream commit 8023dd2204254a70887f5ee58d914bf70a060b9d ]
This fixes the apparent controller hang issue seen during stress test
where the host sends a truncated payload, followed by HCI commands. The
controller treats these HCI commands as a part of previously truncated
payload, leading to command timeouts.
Adding a serdev_device_wait_until_sent() call after
serdev_device_write_buf() fixed the issue.
Fixes: 689ca16e5232 ("Bluetooth: NXP: Add protocol support for NXP Bluetooth chipsets")
Signed-off-by: Neeraj Sanjay Kale <neeraj.sanjaykale@xxxxxxx>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/bluetooth/btnxpuart.c b/drivers/bluetooth/btnxpuart.c
index 5ee9a8b8dcfd..e809bb2dbe5e 100644
--- a/drivers/bluetooth/btnxpuart.c
+++ b/drivers/bluetooth/btnxpuart.c
@@ -1280,6 +1280,7 @@ static void btnxpuart_tx_work(struct work_struct *work)
while ((skb = nxp_dequeue(nxpdev))) {
len = serdev_device_write_buf(serdev, skb->data, skb->len);
+ serdev_device_wait_until_sent(serdev, 0);
hdev->stat.byte_tx += len;
skb_pull(skb, len);
