[PATCH] omap_hsmmc: cater for weird CMD6 behaviour

[Adrian Hunter]

Sometimes the controller unexpectedly produces a TC (transfer
complete) interrupt before the CC (command complete) interrupt for
command 6 (SWITCH).  This is a problem because the CC interrupt
can get mixed up with the next request.  Add a hack for CMD6.

Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
---
 drivers/mmc/host/omap_hsmmc.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 315d1df..28563d6 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -474,6 +474,13 @@ mmc_omap_xfer_done(struct mmc_omap_host *host, struct mmc_data *data)
 	if (!data) {
 		struct mmc_request *mrq = host->mrq;
 
+		/* TC before CC from CMD6 - don't know why, but it happens */
+		if (host->cmd && host->cmd->opcode == 6 &&
+		    host->response_busy) {
+			host->response_busy = 0;
+			return;
+		}
+
 		host->mrq = NULL;
 		mmc_request_done(host->mmc, mrq);
 		return;
-- 
1.5.6.3

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