[PATCH] i2c: qcom-geni: Fix GPI DMA buffer sync-back

[Robin Reckmann]

On Mon, 8 Aug 2022, Wolfram Sang wrote:

> On Sun, Aug 07, 2022 at 11:04:54PM +0900, Robin Reckmann wrote:
>> Fix i2c transfers using GPI DMA mode for all message types that do not set
>> the I2C_M_DMA_SAFE flag (e.g. SMBus "read byte").
>>
>> In this case a bounce buffer is returned by i2c_get_dma_safe_msg_buf(),
>> and it has to synced back to the message after the transfer is done.
>>
>> Add missing assignment of dma buffer in geni_i2c_gpi().
>>
>> Set xferred in i2c_put_dma_safe_msg_buf() to true in case of no error to
>> ensure the sync-back of this dma buffer to the message.
>>
>> Signed-off-by: Robin Reckmann <robin.reckmann at gmail.com>
>
> Thank you! What would be a Fixes tag for this?
>
>
Thanks for having a look!

Fixes: d8703554f4de ("i2c: qcom-geni: Add support for GPI DMA")