[Bug 215167] Bluetooth: hci0: command 0xfc05 tx timeout

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=215167

--- Comment #48 from Oleksandr Natalenko (oleksandr@natalenko.name) ---
(In reply to Chaim Eliyah from comment #46)
> | Reloading `btusb` module several times makes it working.
> 
> Any specific steps for this? I have not been able to get it to work. Issue
> persists despite reboots incl. hard power off/on. This happened suddenly.

No specific steps, just `modprobe -r btusb && modprobe btusb`.

I'm not facing the issue regularly, for me it happened only once recently after
I powered off the system completely for a couple of days. The issue does not
occur across reboots or suspends/resumes. It also doesn't occur after each
power off (at least, so far).

I've adopted the patch from c#38 like below just to be on the safe side:

```
commit 2875e3ab82d1777a06a356167c52a745827b2ad1
Author: Oleksandr Natalenko <oleksandr@natalenko.name>
Date:   Sun Feb 26 00:17:09 2023 +0100

    Bluetooth: btusb: work around command 0xfc05 tx timeout

    Instead of realoding `btusb` module to tackle this:

    ```
    Bluetooth: hci0: command 0xfc05 tx timeout
    Bluetooth: hci0: Reading Intel version command failed (-110)
    ```

    increase `btusb_qca_cmd_timeout()` sleep duration while hoping
    for the best.

    This looks like an ugly hack.

    Link: https://bugzilla.kernel.org/show_bug.cgi?id=215167
    Signed-off-by: Oleksandr Natalenko <oleksandr@natalenko.name>

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 2ad4efdd9e40..7aff6c468c0d 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -901,7 +901,7 @@ static void btusb_qca_cmd_timeout(struct hci_dev *hdev)
                }

                gpiod_set_value_cansleep(reset_gpio, 0);
-               msleep(200);
+               usleep_range(USEC_PER_SEC / 2, USEC_PER_SEC);
                gpiod_set_value_cansleep(reset_gpio, 1);

                return;
```

Let me know if you are able to test it.

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