serial: sh-sci: Do not resubmit DMA descriptors

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Resubmission of DMA descriptors is explicitly forbidden by the DMA
engine API.

Hence pass DMA_CTRL_ACK to dmaengine_prep_slave_sg(), and prepare a new
DMA descriptor instead of reusing the old one.
Remove sci_port.desc_rx[], as there's no longer a need to access the
active descriptor.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Geert Uytterhoeven 2015-08-21 20:02:48 +02:00 • committed by Greg Kroah-Hartman

parent 658daa95b6

commit 47aceb927f

1 changed files with 18 additions and 12 deletions

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drivers/tty/serial/sh-sci.c

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