mmc: dw_mmc: fix the transmission handling in IDMAC

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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>

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Seungwon Jeon 2012-05-20 13:27:21 +09:00 • committed by Chris Ball

parent 2a0fe914a3

commit eed6c63cef

1 changed files with 0 additions and 1 deletions

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drivers/mmc/host/dw_mmc.c

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