linux-kernel - Re: [PATCH] Revert "Bluetooth: hci_ll: set operational frequency earlier"

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Date:   Wed, 2 Oct 2019 22:31:49 +0200
From:   Sebastian Reichel <sre@...nel.org>
To:     Adam Ford <aford173@...il.com>
Cc:     linux-bluetooth@...r.kernel.org, marcel@...tmann.org,
        johan.hedberg@...il.com, linux-kernel@...r.kernel.org,
        adam.ford@...icpd.com
Subject: Re: [PATCH] Revert "Bluetooth: hci_ll: set operational frequency
 earlier"

Hi,

On Wed, Oct 02, 2019 at 06:46:26AM -0500, Adam Ford wrote:
> As nice as it would be to update firmware faster, that patch broke
> at least two different boards, an OMAP4+WL1285 based Motorola Droid
> 4, as reported by Sebasian Reichel and the Logic PD i.MX6Q +
> WL1837MOD.
> 
> This reverts commit a2e02f38eff84f199c8e32359eb213f81f270047.
>
> Signed-off-by: Adam Ford <aford173@...il.com>

Acked-by: Sebastian Reichel <sebastian.reichel@...labora.com>

This should be backported stable

-- Sebastian

> diff --git a/drivers/bluetooth/hci_ll.c b/drivers/bluetooth/hci_ll.c
> index 285706618f8a..d9a4c6c691e0 100644
> --- a/drivers/bluetooth/hci_ll.c
> +++ b/drivers/bluetooth/hci_ll.c
> @@ -621,13 +621,6 @@ static int ll_setup(struct hci_uart *hu)
>  
>  	serdev_device_set_flow_control(serdev, true);
>  
> -	if (hu->oper_speed)
> -		speed = hu->oper_speed;
> -	else if (hu->proto->oper_speed)
> -		speed = hu->proto->oper_speed;
> -	else
> -		speed = 0;
> -
>  	do {
>  		/* Reset the Bluetooth device */
>  		gpiod_set_value_cansleep(lldev->enable_gpio, 0);
> @@ -639,20 +632,6 @@ static int ll_setup(struct hci_uart *hu)
>  			return err;
>  		}
>  
> -		if (speed) {
> -			__le32 speed_le = cpu_to_le32(speed);
> -			struct sk_buff *skb;
> -
> -			skb = __hci_cmd_sync(hu->hdev,
> -					     HCI_VS_UPDATE_UART_HCI_BAUDRATE,
> -					     sizeof(speed_le), &speed_le,
> -					     HCI_INIT_TIMEOUT);
> -			if (!IS_ERR(skb)) {
> -				kfree_skb(skb);
> -				serdev_device_set_baudrate(serdev, speed);
> -			}
> -		}
> -
>  		err = download_firmware(lldev);
>  		if (!err)
>  			break;
> @@ -677,7 +656,25 @@ static int ll_setup(struct hci_uart *hu)
>  	}
>  
>  	/* Operational speed if any */
> +	if (hu->oper_speed)
> +		speed = hu->oper_speed;
> +	else if (hu->proto->oper_speed)
> +		speed = hu->proto->oper_speed;
> +	else
> +		speed = 0;
> +
> +	if (speed) {
> +		__le32 speed_le = cpu_to_le32(speed);
> +		struct sk_buff *skb;
>  
> +		skb = __hci_cmd_sync(hu->hdev, HCI_VS_UPDATE_UART_HCI_BAUDRATE,
> +				     sizeof(speed_le), &speed_le,
> +				     HCI_INIT_TIMEOUT);
> +		if (!IS_ERR(skb)) {
> +			kfree_skb(skb);
> +			serdev_device_set_baudrate(serdev, speed);
> +		}
> +	}
>  
>  	return 0;
>  }
> -- 
> 2.17.1
> 

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