* [PATCH 3/3] Bluetooth: hci_bcm: Ignore deprecated command fail case
@ 2020-10-14 5:47 Amitesh Chandra
2020-11-11 11:07 ` Marcel Holtmann
0 siblings, 1 reply; 2+ messages in thread
From: Amitesh Chandra @ 2020-10-14 5:47 UTC (permalink / raw)
To: marcel, johan.hedberg, linux-bluetooth, linux-kernel
Cc: amitesh.chandra, ravi.nagarajan, cheneyni, Manoj Babulal
From: Manoj Babulal <manoj.babulal@broadcom.com>
Broadcom VSC uart_clock_setting is deprecated in
newer controllers. Ignore error if the controller
returns invalid or bad request error code.
Signed-off-by: Amitesh Chandra <amitesh.chandra@broadcom.com>
Signed-off-by: Manoj Babulal <manoj.babulal@broadcom.com>
---
drivers/bluetooth/hci_bcm.c | 15 +++++++++------
1 file changed, 9 insertions(+), 6 deletions(-)
diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c
index 680478f..d316788 100644
--- a/drivers/bluetooth/hci_bcm.c
+++ b/drivers/bluetooth/hci_bcm.c
@@ -158,15 +158,18 @@ static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed)
skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
int err = PTR_ERR(skb);
- bt_dev_err(hdev, "BCM: failed to write clock (%d)",
- err);
- return err;
+ /* Ignore err if command is deprecated in controller */
+ if (err != -EBADRQC) {
+ bt_dev_err(hdev, "BCM: failed to write "
+ "clock (%d)", err);
+ return err;
+ }
+ } else {
+ kfree_skb(skb);
}
-
- kfree_skb(skb);
}
- bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed);
+ bt_dev_info(hdev, "Set Controller UART speed to %d bit/s", speed);
param.zero = cpu_to_le16(0);
param.baud_rate = cpu_to_le32(speed);
--
2.7.4
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH 3/3] Bluetooth: hci_bcm: Ignore deprecated command fail case
2020-10-14 5:47 [PATCH 3/3] Bluetooth: hci_bcm: Ignore deprecated command fail case Amitesh Chandra
@ 2020-11-11 11:07 ` Marcel Holtmann
0 siblings, 0 replies; 2+ messages in thread
From: Marcel Holtmann @ 2020-11-11 11:07 UTC (permalink / raw)
To: Amitesh Chandra
Cc: Johan Hedberg, linux-bluetooth, open list, amitesh.chandra,
ravi.nagarajan, cheneyni, Manoj Babulal
Hi Amitesh,
> Broadcom VSC uart_clock_setting is deprecated in
> newer controllers. Ignore error if the controller
> returns invalid or bad request error code.
>
> Signed-off-by: Amitesh Chandra <amitesh.chandra@broadcom.com>
> Signed-off-by: Manoj Babulal <manoj.babulal@broadcom.com>
> ---
> drivers/bluetooth/hci_bcm.c | 15 +++++++++------
> 1 file changed, 9 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c
> index 680478f..d316788 100644
> --- a/drivers/bluetooth/hci_bcm.c
> +++ b/drivers/bluetooth/hci_bcm.c
> @@ -158,15 +158,18 @@ static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed)
> skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT);
> if (IS_ERR(skb)) {
> int err = PTR_ERR(skb);
> - bt_dev_err(hdev, "BCM: failed to write clock (%d)",
> - err);
> - return err;
> + /* Ignore err if command is deprecated in controller */
> + if (err != -EBADRQC) {
> + bt_dev_err(hdev, "BCM: failed to write "
> + "clock (%d)", err);
> + return err;
> + }
> + } else {
> + kfree_skb(skb);
> }
> -
> - kfree_skb(skb);
> }
So I really disliked try-and-error of HCI commands. Can we know up-front
somehow if the controller supports a command or not. It is a total waste of
time to send a command that might fail. So we better know this before
sending it.
Regards
Marcel
^ permalink raw reply [flat|nested] 2+ messages in thread
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2020-11-11 11:07 ` Marcel Holtmann
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