On Wed, Oct 10, 2018 at 01:00:17PM -0700, Stephen Boyd wrote:

This irq handler is always reading bytes from the device into a
kmalloced buffer, so it's safe to mark this transaction as DMA safe.
This avoids bouncing the buffer when an i2c controller decides to use
DMA for a transaction.

Cc: Wolfram Sang <redacted>
Signed-off-by: Stephen Boyd <redacted>

For the record:

Acked-by: Wolfram Sang <redacted>