USB: serial: keyspan_pda: refactor write-room handling

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Add helper to retrieve the available device transfer-buffer space.

Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>

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Johan Hovold 2020-10-25 18:45:53 +01:00

parent 320f9028c7

commit 79fe6826a5

1 changed files with 50 additions and 63 deletions

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drivers/usb/serial/keyspan_pda.c

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