mmc: card: Don't access RPMB partitions for normal read/write

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: f298654eadd4 ("mmc: core: Expose access to RPMB partition")
Signed-off-by: Yunpeng Gao <yunpeng.gao@intel.com>
Signed-off-by: Chuanxiao Dong <chuanxiao.dong@intel.com>
Tested-by: Michael Shigorin <mike@altlinux.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index 2c25271f8c417e21982e43b2d163e65556e6aca1..60f7141a6b02e66c23b59404ea59ba7d716c057f 100644 (file)
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -1029,6 +1029,18 @@ static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type)
        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;

diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c
index 236d194c28835e87adb9bc108c55f5e122353c68..8efa3684aef849174ccef4053e049e3c95d8646f 100644 (file)
--- a/drivers/mmc/card/queue.c
+++ b/drivers/mmc/card/queue.c
@@ -38,7 +38,7 @@ static int mmc_prep_request(struct request_queue *q, struct request *req)
                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;

diff --git a/drivers/mmc/card/queue.h b/drivers/mmc/card/queue.h
index 5752d50049a34c2a9ee8f6585105990f1e018d05..99e6521e61696202c036dfb00fe6bdcd96c0f613 100644 (file)
--- a/drivers/mmc/card/queue.h
+++ b/drivers/mmc/card/queue.h
@@ -73,4 +73,6 @@ extern void mmc_queue_bounce_post(struct mmc_queue_req *);
 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