i2c: rcar: skip DMA if buffer is not safe

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This HW is prone to races, so it needs to setup new messages in irq
context. That means we can't alloc bounce buffers if a message buffer is
not DMA safe. So, in that case, simply fall back to PIO.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

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Wolfram Sang 2017-11-04 21:20:09 +01:00 • committed by Wolfram Sang

parent fe23aa9a16

commit adbd77b589

1 changed files with 1 additions and 1 deletions

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drivers/i2c/busses/i2c-rcar.c

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