tree c8093cf8803bfe3793c46edcea965f9583e35e93
parent 8f588e40c788e63756ca1028c253f9f663d7d1c5
author Shinya Kuribayashi <shinya.kuribayashi@necel.com> 1257511896 +0900
committer Ben Dooks <ben-linux@fluff.org> 1260317952 +0000

i2c-designware: Skip RX_FULL and TX_EMPTY bits on tx abort errors

Suppose TX_ABRT occurs in the middle of processing i2c_msg msgs[], and
a STOP condition has already been generated on the bus.  In this case,
subsequent i2c_dw_xfer_msg() might initiate a new and unnecessary I2C
transaction, which we'd have to avoid.

Furthermore, anytime TX_ABRT is set, the contents of tx/rx buffers are
flushed, so we don't have to process RX_FULL and TX_EMPTY.

Disable interrupts, and skip them.

Signed-off-by: Shinya Kuribayashi <shinya.kuribayashi@necel.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>