linux-kernel - [PATCH] Revert "Bluetooth: hci_qca: Add delay for wcn3990 stability"

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Date:   Mon, 21 Oct 2019 07:18:27 -0700
From:   Jeffrey Hugo <jeffrey.l.hugo@...il.com>
To:     marcel@...tmann.org, johan.hedberg@...il.com,
        c-hbandi@...eaurora.org, bgodavar@...eaurora.org
Cc:     linux-bluetooth@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Jeffrey Hugo <jeffrey.l.hugo@...il.com>
Subject: [PATCH] Revert "Bluetooth: hci_qca: Add delay for wcn3990 stability"

This reverts commit cde9dde6e11a5ab54b6462cd46d82878926783bc.

The frame reassembly errors were root caused to a transient gpio issue.
The missing response was root caused to an issue with properly managing
RFR in the uart driver.  Addressing those root causes occurs outside of
hci_qca and eliminates the need for the 50ms delay, so remove it.

Signed-off-by: Jeffrey Hugo <jeffrey.l.hugo@...il.com>
---
 drivers/bluetooth/hci_qca.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index 8ae91e0f8102..c591a8ba9d93 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -1155,10 +1155,8 @@ static int qca_set_speed(struct hci_uart *hu, enum qca_speed_type speed_type)
 		host_set_baudrate(hu, speed);
 
 error:
-		if (qca_is_wcn399x(soc_type)) {
-			msleep(50);
+		if (qca_is_wcn399x(soc_type))
 			hci_uart_set_flow_control(hu, false);
-		}
 
 		if (soc_type == QCA_WCN3990) {
 			/* Wait for the controller to send the vendor event
-- 
2.17.1