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authorAdrian Hunter <adrian.hunter@intel.com>2012-04-05 11:45:48 (GMT)
committerChris Ball <cjb@laptop.org>2012-04-21 00:28:58 (GMT)
commit283028122db37621b124f079ca8eae5b64807ad4 (patch)
tree54ffa48017525a2df2acd3404e43490c88b6c49a
parent7194efb8f063ee3aa0cb50d9002348887e68ec10 (diff)
downloadlinux-283028122db37621b124f079ca8eae5b64807ad4.tar.xz
mmc: fixes for eMMC v4.5 sanitize operation
eMMC v4.5 sanitize operation erases all copies of unmapped data. However trim or erase operations must be used first to unmap the required sectors. That was not being done. Fixes apply to linux 3.2 on. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: <stable@vger.kernel.org> Acked-by: Jaehoon Chung <jh80.chung@samsung.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Chris Ball <cjb@laptop.org>
-rw-r--r--drivers/mmc/card/block.c54
-rw-r--r--drivers/mmc/core/core.c2
2 files changed, 40 insertions, 16 deletions
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index b180965..4232bc4 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -873,7 +873,7 @@ static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
{
struct mmc_blk_data *md = mq->data;
struct mmc_card *card = md->queue.card;
- unsigned int from, nr, arg;
+ unsigned int from, nr, arg, trim_arg, erase_arg;
int err = 0, type = MMC_BLK_SECDISCARD;
if (!(mmc_can_secure_erase_trim(card) || mmc_can_sanitize(card))) {
@@ -881,20 +881,26 @@ static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
goto out;
}
+ from = blk_rq_pos(req);
+ nr = blk_rq_sectors(req);
+
/* The sanitize operation is supported at v4.5 only */
if (mmc_can_sanitize(card)) {
- err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
- EXT_CSD_SANITIZE_START, 1, 0);
- goto out;
+ erase_arg = MMC_ERASE_ARG;
+ trim_arg = MMC_TRIM_ARG;
+ } else {
+ erase_arg = MMC_SECURE_ERASE_ARG;
+ trim_arg = MMC_SECURE_TRIM1_ARG;
}
- from = blk_rq_pos(req);
- nr = blk_rq_sectors(req);
-
- if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr))
- arg = MMC_SECURE_TRIM1_ARG;
- else
- arg = MMC_SECURE_ERASE_ARG;
+ if (mmc_erase_group_aligned(card, from, nr))
+ arg = erase_arg;
+ else if (mmc_can_trim(card))
+ arg = trim_arg;
+ else {
+ err = -EINVAL;
+ goto out;
+ }
retry:
if (card->quirks & MMC_QUIRK_INAND_CMD38) {
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
@@ -904,25 +910,41 @@ retry:
INAND_CMD38_ARG_SECERASE,
0);
if (err)
- goto out;
+ goto out_retry;
}
+
err = mmc_erase(card, from, nr, arg);
- if (!err && arg == MMC_SECURE_TRIM1_ARG) {
+ if (err == -EIO)
+ goto out_retry;
+ if (err)
+ goto out;
+
+ if (arg == MMC_SECURE_TRIM1_ARG) {
if (card->quirks & MMC_QUIRK_INAND_CMD38) {
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
INAND_CMD38_ARG_EXT_CSD,
INAND_CMD38_ARG_SECTRIM2,
0);
if (err)
- goto out;
+ goto out_retry;
}
+
err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG);
+ if (err == -EIO)
+ goto out_retry;
+ if (err)
+ goto out;
}
-out:
- if (err == -EIO && !mmc_blk_reset(md, card->host, type))
+
+ if (mmc_can_sanitize(card))
+ err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+ EXT_CSD_SANITIZE_START, 1, 0);
+out_retry:
+ if (err && !mmc_blk_reset(md, card->host, type))
goto retry;
if (!err)
mmc_blk_reset_success(md, type);
+out:
spin_lock_irq(&md->lock);
__blk_end_request(req, err, blk_rq_bytes(req));
spin_unlock_irq(&md->lock);
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 83db5ef..e541efb 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1702,6 +1702,8 @@ EXPORT_SYMBOL(mmc_can_discard);
int mmc_can_sanitize(struct mmc_card *card)
{
+ if (!mmc_can_trim(card) && !mmc_can_erase(card))
+ return 0;
if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_SANITIZE)
return 1;
return 0;