Re: [PATCH v7 2/2] Bluetooth: qca: Fix BT enable failure for QCA6390 after disable then warm reboot

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On Wed, Apr 24, 2024 at 12:26:47PM +0800, Zijun Hu wrote:
> From: Zijun Hu <zijuhu@xxxxxxxxxxxxxxxx>
> Commit 272970be3dab ("Bluetooth: hci_qca: Fix driver shutdown on closed
> serdev") will cause below regression issue:
> BT can't be enabled after below steps:
> cold boot -> enable BT -> disable BT -> warm reboot -> BT enable failure
> if property enable-gpios is not configured within DT|ACPI for QCA6390.
> The commit is to fix a use-after-free issue within qca_serdev_shutdown()
> during reboot, but also introduces this regression issue regarding above
> steps since the VSC is not sent to reset controller during warm reboot.
> Fixed by sending the VSC to reset controller within qca_serdev_shutdown()
> once BT was ever enabled, and the use-after-free issue is also be fixed
> by this change since serdev is still opened when send to serdev.
> Fixes: 272970be3dab ("Bluetooth: hci_qca: Fix driver shutdown on closed serdev")
> Cc: stable@xxxxxxxxxxxxxx

That is not a valid email address :(

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