This is a note to let you know that I've just added the patch titled
mmc: card: Don't access RPMB partitions for normal read/write
to the 3.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mmc-card-don-t-access-rpmb-partitions-for-normal-read-write.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 4e93b9a6abc0d028daf3c8a00cb77b679d8a4df4 Mon Sep 17 00:00:00 2001
From: Chuanxiao Dong <[email protected]>
Date: Tue, 12 Aug 2014 12:01:30 +0800
Subject: mmc: card: Don't access RPMB partitions for normal read/write
From: Chuanxiao Dong <[email protected]>
commit 4e93b9a6abc0d028daf3c8a00cb77b679d8a4df4 upstream.
During kernel boot, it will try to read some logical sectors
of each block device node for the possible partition table.
But since RPMB partition is special and can not be accessed
by normal eMMC read / write CMDs, it will cause below error
messages during kernel boot:
...
mmc0: Got data interrupt 0x00000002 even though no data operation was in
progress.
mmcblk0rpmb: error -110 transferring data, sector 0, nr 32, cmd response
0x900, card status 0xb00
mmcblk0rpmb: retrying using single block read
mmcblk0rpmb: timed out sending r/w cmd command, card status 0x400900
mmcblk0rpmb: timed out sending r/w cmd command, card status 0x400900
mmcblk0rpmb: timed out sending r/w cmd command, card status 0x400900
mmcblk0rpmb: timed out sending r/w cmd command, card status 0x400900
mmcblk0rpmb: timed out sending r/w cmd command, card status 0x400900
mmcblk0rpmb: timed out sending r/w cmd command, card status 0x400900
end_request: I/O error, dev mmcblk0rpmb, sector 0
Buffer I/O error on device mmcblk0rpmb, logical block 0
end_request: I/O error, dev mmcblk0rpmb, sector 8
Buffer I/O error on device mmcblk0rpmb, logical block 1
end_request: I/O error, dev mmcblk0rpmb, sector 16
Buffer I/O error on device mmcblk0rpmb, logical block 2
end_request: I/O error, dev mmcblk0rpmb, sector 24
Buffer I/O error on device mmcblk0rpmb, logical block 3
...
This patch will discard the access request in eMMC queue if
it is RPMB partition access request. By this way, it avoids
trigger above error messages.
Fixes: 090d25fe224c ("mmc: core: Expose access to RPMB partition")
Signed-off-by: Yunpeng Gao <[email protected]>
Signed-off-by: Chuanxiao Dong <[email protected]>
Tested-by: Michael Shigorin <[email protected]>
Signed-off-by: Ulf Hansson <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/mmc/card/block.c | 12 ++++++++++++
drivers/mmc/card/queue.c | 2 +-
drivers/mmc/card/queue.h | 2 ++
3 files changed, 15 insertions(+), 1 deletion(-)
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -908,6 +908,18 @@ static inline void mmc_blk_reset_success
md->reset_done &= ~type;
}
+int mmc_access_rpmb(struct mmc_queue *mq)
+{
+ struct mmc_blk_data *md = mq->data;
+ /*
+ * If this is a RPMB partition access, return ture
+ */
+ if (md && md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
+ return true;
+
+ return false;
+}
+
static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
{
struct mmc_blk_data *md = mq->data;
--- a/drivers/mmc/card/queue.c
+++ b/drivers/mmc/card/queue.c
@@ -37,7 +37,7 @@ static int mmc_prep_request(struct reque
return BLKPREP_KILL;
}
- if (mq && mmc_card_removed(mq->card))
+ if (mq && (mmc_card_removed(mq->card) || mmc_access_rpmb(mq)))
return BLKPREP_KILL;
req->cmd_flags |= REQ_DONTPREP;
--- a/drivers/mmc/card/queue.h
+++ b/drivers/mmc/card/queue.h
@@ -73,4 +73,6 @@ extern void mmc_queue_bounce_post(struct
extern int mmc_packed_init(struct mmc_queue *, struct mmc_card *);
extern void mmc_packed_clean(struct mmc_queue *);
+extern int mmc_access_rpmb(struct mmc_queue *);
+
#endif
Patches currently in stable-queue which might be from [email protected]
are
queue-3.10/mmc-card-don-t-access-rpmb-partitions-for-normal-read-write.patch
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