tree c8be5ba50ffd562d35bccbb140bd4ba5644185e4
parent 2a0fe914a38745f5b03534c4e4f4056cbd6978b8
author Seungwon Jeon <tgih.jun@samsung.com> 1337488041 +0900
committer Chris Ball <cjb@laptop.org> 1338989747 -0400

mmc: dw_mmc: fix the transmission handling in IDMAC

DTO interrupt can be later than transmit interrupt(IDMAC) in case of
write. Current handling of IDMAC interrupt sets EVENT_DATA_COMPLETE as
well as EVENT_XFER_COMPLETE regardless of DTO rising. This makes the
current request finish in tasklet and permits the next request even
though current data transfer is still in progress. As a result, sequence
is broken and lock-up happens. Setting EVENT_DATA_COMPLETE is not proper
after IDMAC interrupt. It should be taken after DTO interrupt is
generated.

Reported-by: Dmitry Shmidt <dimitrysh@android.com>
Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Signed-off-by: Hyeonsu Kim <hyeonsu.kim@samsung.com>
Acked-by: Will Newton <will.newton@imgtec.com>
Signed-off-by: Chris Ball <cjb@laptop.org>