i2c: ocores: generate stop condition after timeout in polling mode

In polling mode, no stop condition is generated after a timeout. This
causes SCL to remain low and thereby block the bus. If this happens
during a transfer it can cause slaves to misinterpret the subsequent
transfer and return wrong values.

To solve this, pass the ETIMEDOUT error up from ocores_process_polling()
instead of setting STATE_ERROR directly. The caller is adjusted to call
ocores_process_timeout() on error both in polling and in IRQ mode, which
will set STATE_ERROR and generate a stop condition.

Fixes: 69c8c0c0efa8 ("i2c: ocores: add polling interface")
Signed-off-by: Gregor Herburger <[email protected]>
Signed-off-by: Matthias Schiffer <[email protected]>
Acked-by: Peter Korsgaard <[email protected]>
Reviewed-by: Andrew Lunn <[email protected]>
Reviewed-by: Federico Vaga <[email protected]>
Signed-off-by: Wolfram Sang <[email protected]>

0 files changed, 0 insertions, 0 deletions