From: Seungwon Jeon <tgih.jun@samsung.com>
Date: Sun, 20 May 2012 04:27:21 +0000 (+0900)
Subject: mmc: dw_mmc: fix the transmission handling in IDMAC
X-Git-Tag: v3.5-rc4~28^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=eed6c63cefaf935e6fb28c4dd9977a280ae544a8;p=pandora-kernel.git

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>
---

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