Re: [PATCH] Bluetooth: hci_mrvl: Fix wrong return value check of wait_on_bit_timeout()

[Loic Poulain]

On Mon, Aug 24, 2026 at 9:13 AM Gongwei Li <13875017792@xxxxxxx> wrote:
>
> From: Gongwei Li <ligongwei@xxxxxxxxxx>
>
> wait_on_bit_timeout() returns 0 if the bit was cleared, -EINTR if the
> process received a signal and the mode permitted wake up on that signal,
> or -EAGAIN if the timeout elapsed.  It never returns 1.
>
> Hence the check "err == 1" in mrvl_load_firmware() is dead code: when
> the waiting task is interrupted by a signal (-EINTR), the code falls
> into the "else if (err)" branch and misreports it as "Firmware request
> timeout" with -ETIMEDOUT instead of propagating -EINTR.
>
> Fix this by testing for -EINTR so that an interrupted firmware load is
> properly detected and reported.
>
> Fixes: 162f812f23ba ("Bluetooth: hci_uart: Add Marvell support")
> Signed-off-by: Gongwei Li <ligongwei@xxxxxxxxxx>
> ---
>  drivers/bluetooth/hci_mrvl.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/bluetooth/hci_mrvl.c b/drivers/bluetooth/hci_mrvl.c
> index 516b8f74c434..52badd1fe81a 100644
> --- a/drivers/bluetooth/hci_mrvl.c
> +++ b/drivers/bluetooth/hci_mrvl.c
> @@ -307,7 +307,7 @@ static int mrvl_load_firmware(struct hci_dev *hdev, const char *name)
>                 err = wait_on_bit_timeout(&mrvl->flags, STATE_FW_REQ_PENDING,
>                                           TASK_INTERRUPTIBLE,
>                                           msecs_to_jiffies(2000));
> -               if (err == 1) {
> +               if (err == -EINTR) {
>                         bt_dev_err(hdev, "Firmware load interrupted");
>                         err = -EINTR;

Then we can drop the above line.

>                         break;
> --
> 2.25.1
>