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Cássio Gabriel
6438d07070
[ Upstream commitb9bdd68b8b] request_firmware_nowait() keeps the callback module pinned and holds a device reference until the firmware work completes. Callers still have no way to cancel or synchronize the queued callback before tearing down their driver-private state. Track scheduled async firmware work in an internal list and add request_firmware_nowait_cancel(). The helper cancels work matching the device, callback context and callback function. It cancels work that has not started yet and waits for an already-running callback to return. If the request has already completed, it is a no-op. Keep the existing request_firmware_nowait() lifetime model manual. A devres-managed variant can be layered on top separately if needed. Signed-off-by: Cássio Gabriel <cassiogabrielcontato@gmail.com> Reviewed-by: Takashi Iwai <tiwai@suse.de> Acked-by: Danilo Krummrich <dakr@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de> Link: https://patch.msgid.link/20260505-alsa-hda-tas2781-fw-callback-teardown-v4-1-e7c4bf930dc8@gmail.com Stable-dep-of:5367e2ad14("ALSA: hda/tas2781: Cancel async firmware request at unbind") Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>