From: Guenter Roeck <linux@roeck-us.net>
To: regressions@lists.linux.dev
Cc: stable <stable@vger.kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Kai-Heng Feng <kai.heng.feng@canonical.com>,
Marcel Holtmann <marcel@holtmann.org>
Subject: regression: Bluetooth interface broken on systems with Mediatek CPU
Date: Fri, 6 Aug 2021 15:21:58 -0700 [thread overview]
Message-ID: <a9cd03da-b816-eed3-7e77-d539924cbe88@roeck-us.net> (raw)
[ Greg asked me to submit a report to regressions@, so here it is. ]
The following error was observed on Chromebooks with MT8183 CPU
(ASUS Chromebook Detachable CM3, HP Chromebook 11a, and others):
[ 224.735198] Bluetooth: qca_setup() hci0: setting up ROME/QCA6390
[ 225.205024] Bluetooth: qca_read_soc_version() hci0: QCA Product ID :0x00000008
[ 225.205040] Bluetooth: qca_read_soc_version() hci0: QCA SOC Version :0x00000044
[ 225.205045] Bluetooth: qca_read_soc_version() hci0: QCA ROM Version :0x00000302
[ 225.205049] Bluetooth: qca_read_soc_version() hci0: QCA Patch Version:0x000003e8
[ 225.205055] Bluetooth: qca_uart_setup() hci0: QCA controller version 0x00440302
[ 225.205061] Bluetooth: qca_download_firmware() hci0: QCA Downloading qca/rampatch_00440302.bin
[ 227.252653] Bluetooth: hci_cmd_timeout() hci0: command 0xfc00 tx timeout
...
[ 223.604971] Bluetooth: qca_recv() hci0: Frame reassembly failed (-84)
[ 223.605027] Bluetooth: qca_recv() hci0: Frame reassembly failed (-84)
(repeated several times)
...
The Bluetooth interface on those Chromebooks can not be enabled.
Bisect suggests that upstream commit 0ea9fd001a14 ("Bluetooth: Shutdown
controller after workqueues are flushed or cancelled") introduced the problem.
Reverting it fixes the problem.
The problem was also reported at [1] on a Mediatek Pumpkin board.
As of this writing, the problem is still present in the upstream kernel
as well as in all stable releases which include commit 0ea9fd001a14.
Thanks,
Guenter
---
[1] https://lkml.org/lkml/2021/7/28/569
next reply other threads:[~2021-08-06 22:22 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-06 22:21 Guenter Roeck [this message]
2021-08-09 2:35 ` regression: Bluetooth interface broken on systems with Mediatek CPU Kai-Heng Feng
2021-08-09 4:10 ` Guenter Roeck
2021-08-09 4:48 ` Kai-Heng Feng
2021-08-09 19:18 ` Guenter Roeck
2021-08-09 13:26 ` Marcel Holtmann
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