usb: gadget: u_serial: process RX in workqueue instead of tasklet

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Switch RX processing from tasklet to (delayed) work queue. This allows
receiver more room to process incoming data and prevents flood of
"ttyGS0: RX not scheduled?" messages on HS receive on slow CPU.

A side effect is 2.4MB/s zmodem transfer speed (up from 1.8MB/s)
on my test board.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

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Michał Mirosław 2018-12-16 21:23:47 +01:00 • committed by Felipe Balbi

parent 539cf10391

commit 8b4c62aef6

1 changed files with 14 additions and 21 deletions

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35

drivers/usb/gadget/function/u_serial.c

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