APPLIED Re: [PATCH 0/2][SRU][OEM-5.14] Need to reset MT7921 BT when the firmware hang or command no response

Timo Aaltonen tjaalton at ubuntu.com
Tue Mar 22 11:00:06 UTC 2022


AceLan Kao kirjoitti 18.3.2022 klo 4.15:
> From: "Chia-Lin Kao (AceLan)" <acelan.kao at canonical.com>
> 
> BugLink: https://bugs.launchpad.net/bugs/1965467
> 
> [Impact]
> Encounter BT command timeout issue when doing reboot test, and BT becomes
> unusable.
> Mar 15 22:04:44 u-Inspiron-15-3525 kernel: [ 463.633675] usb 3-4: reset high-speed USB device number 3 using xhci_hcd
> Mar 15 22:04:45 u-Inspiron-15-3525 kernel: [ 465.027012] Bluetooth: hci0: command 0x2005 tx timeout
> Mar 15 22:04:47 u-Inspiron-15-3525 kernel: [ 467.043176] Bluetooth: hci0: command 0x2041 tx timeout
> 
> [Fix]
> Backport below 2 commit from v5.15-rc1 fix this issue
> e947802657cb Bluetooth: btusb: Support Bluetooth Reset for Mediatek Chip(MT7921)
> 0b10c8c84c0c Bluetooth: btusb: Record debug log for Mediatek Chip.
> 
> [Test]
> Verified on the problem machine, and confirmed it works
> 
> [Where problems could occur]
> It adds a new function to cmd_timeout callback, so it won't affect old
> behaviors. This only affects the chip which has command timeout issue,
> and could reset the chip when encounter the issue.
> 
> mark-yw.chen (2):
>    Bluetooth: btusb: Record debug log for Mediatek Chip.
>    Bluetooth: btusb: Support Bluetooth Reset for Mediatek Chip(MT7921)
> 
>   drivers/bluetooth/btusb.c | 154 +++++++++++++++++++++++++++++++++++++-
>   1 file changed, 153 insertions(+), 1 deletion(-)
> 

applied to oem-5.14, thanks

-- 
t



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