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mmc: dw_mmc: guarantee stop-abort cmd in data errors

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In error cases, DTO interrupt may or may not be generated depending
on remained data. Stop/Abort command ensures DTO generation for that
situation. Currently if 'stop' field of data is empty, there is no
stop/abort command. So, it could hang waiting DTO. This change
reinforces these cases.

Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Tested-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Seungwon Jeon
2013-08-31 00:14:05 +09:00
committed by Chris Ball
parent 71abb13394
commit 90c2143a8f
2 changed files with 66 additions and 20 deletions
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2
include/linux/mmc/dw_mmc.h
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@@ -15,6 +15,7 @@
#define LINUX_MMC_DW_MMC_H
#include <linux/scatterlist.h>
#include <linux/mmc/core.h>
#define MAX_MCI_SLOTS 2
@@ -129,6 +130,7 @@ struct dw_mci {
struct mmc_request *mrq;
struct mmc_command *cmd;
struct mmc_data *data;
struct mmc_command stop_abort;
unsigned int prev_blksz;
unsigned char timing;
struct workqueue_struct *card_workqueue;