linux

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Davidlohr Bueso 8653d71ce3 usb/gadget: f_midi: Replace tasklet with work

Currently a tasklet is used to transmit input substream buffer
data. However, tasklets have long been deprecated as being too
heavy on the system by running in irq context - and this is not
a performance critical path. If a higher priority process wants
to run, it must wait for the tasklet to finish before doing so.

Deferring work to a workqueue and executing in process context
should be fine considering the callback already does
f_midi_do_transmit() under the transmit_lock and thus changes in
semantics are ok regarding concurrency - tasklets being serialized
against itself.

Cc: Takashi Iwai <tiwai@suse.de>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Link: https://lore.kernel.org/r/20210111042855.73289-1-dave@stgolabs.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2021-01-12 12:52:28 +01:00

function

usb/gadget: f_midi: Replace tasklet with work

2021-01-12 12:52:28 +01:00

legacy

USB: gadget: legacy: fix return error code in acm_ms_bind()

2020-12-28 15:45:50 +01:00

udc

usb: udc: core: Introduce started state

2021-01-12 12:50:20 +01:00

composite.c

Merge 5.11-rc3 into usb-next