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Bluetooth: btnxpuart: Fix driver sending truncated data

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[ Upstream commit 8023dd2204 ]

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: 689ca16e52 ("Bluetooth: NXP: Add protocol support for NXP Bluetooth chipsets")
Signed-off-by: Neeraj Sanjay Kale <neeraj.sanjaykale@nxp.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Neeraj Sanjay Kale
2024-12-20 18:32:52 +05:30
committed by Greg Kroah-Hartman
parent 327bd191bb
commit b455f05070
1 changed files with 1 additions and 0 deletions
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drivers/bluetooth/btnxpuart.c
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@@ -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);