[PATCH i2c-next v9 0/5] i2c: aspeed: Add bus idle waiting logic for multi-master use cases

[Wolfram Sang <wsa@the-dreams.de>]

On Tue, Oct 30, 2018 at 02:09:11PM -0700, Jae Hyun Yoo wrote:
> In multi-master environment, this driver's master cannot know
> exactly when a peer master sends data to this driver's slave so a
> case can be happened that this master tries to send data through
> the master_xfer function but slave data from peer master is still
> being processed by this driver. To prevent state corruption in the
> case, this patch adds checking code if any slave operation is
> ongoing and it waits up to the bus timeout duration before starting
> a master_xfer operation.
> 
> To support this change, it introduces changes on i2c-core-base to
> make that able to read the bus timeout and master transfer retries
> count values from device tree properties.
> 
> Please review this patch set.

Marking this as "Changes requested". I think if the mutex approach
works, these patches become obsolete then.

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 833 bytes
Desc: not available
URL: <http://lists.ozlabs.org/pipermail/linux-aspeed/attachments/20190115/7fd71a22/attachment.sig>