2017-01-10 03:46:28

by Jesse Sung

Subject: [PATCH] Bluetooth: btbcm: Add a delay for module reset

Some btbcm devices require more time to complete its reset process.
They won't reply any hci command until reset is done.

[ 17.218554] Bluetooth: hci0 command 0x1001 tx timeout
[ 25.214999] Bluetooth: hci0: BCM: Reading local version info failed (-110)

Signed-off-by: Wen-chien Jesse Sung <[email protected]>
---
drivers/bluetooth/btbcm.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/bluetooth/btbcm.c b/drivers/bluetooth/btbcm.c
index fdb4482..195763f 100644
--- a/drivers/bluetooth/btbcm.c
+++ b/drivers/bluetooth/btbcm.c
@@ -177,6 +177,8 @@ static int btbcm_reset(struct hci_dev *hdev)
return err;
}
kfree_skb(skb);
+ /* 100 msec delay for module to complete reset process */
+ msleep(100);

return 0;
}
--
2.7.4

2017-02-16 16:33:11

by Marcel Holtmann

Subject: Re: [PATCH] Bluetooth: btbcm: Add a delay for module reset

Hi Wen-chien,

> Some btbcm devices require more time to complete its reset process.
> They won't reply any hci command until reset is done.
>
> [ 17.218554] Bluetooth: hci0 command 0x1001 tx timeout
> [ 25.214999] Bluetooth: hci0: BCM: Reading local version info failed (-110)
>
> Signed-off-by: Wen-chien Jesse Sung <[email protected]>
> ---
> drivers/bluetooth/btbcm.c | 2 ++
> 1 file changed, 2 insertions(+)

patch has been applied to bluetooth-next tree.

Regards

Marcel