Normal read and write commands may not be used while the command queue is
enabled. Disable the Command Queue when mmc_test is probed and re-enable it
when it is removed.
Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
---
drivers/mmc/card/mmc_test.c | 13 +++++++++++++
drivers/mmc/core/mmc.c | 7 +++++++
include/linux/mmc/card.h | 1 +
3 files changed, 21 insertions(+)
diff --git a/drivers/mmc/card/mmc_test.c b/drivers/mmc/card/mmc_test.c
index 5a8dc5a76e0d..7dee9e5a8cfb 100644
--- a/drivers/mmc/card/mmc_test.c
+++ b/drivers/mmc/card/mmc_test.c
@@ -3240,6 +3240,14 @@ static int mmc_test_probe(struct mmc_card *card)
if (ret)
return ret;
+ if (card->ext_csd.cmdq_en) {
+ mmc_claim_host(card->host);
+ ret = mmc_cmdq_disable(card);
+ mmc_release_host(card->host);
+ if (ret)
+ return ret;
+ }
+
dev_info(&card->dev, "Card claimed for testing.\n");
return 0;
@@ -3247,6 +3255,11 @@ static int mmc_test_probe(struct mmc_card *card)
static void mmc_test_remove(struct mmc_card *card)
{
+ if (card->reenable_cmdq) {
+ mmc_claim_host(card->host);
+ mmc_cmdq_enable(card);
+ mmc_release_host(card->host);
+ }
mmc_test_free_result(card);
mmc_test_free_dbgfs_file(card);
}
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index b5c4cf276b49..bb11797a74b2 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -1732,6 +1732,13 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
}
/*
+ * In some cases (e.g. RPMB or mmc_test), the Command Queue must be
+ * disabled for a time, so a flag is needed to indicate to re-enable the
+ * Command Queue.
+ */
+ card->reenable_cmdq = card->ext_csd.cmdq_en;
+
+ /*
* The mandatory minimum values are defined for packed command.
* read: 5, write: 3
*/
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 476ccbe3f831..3d7434e48566 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -285,6 +285,7 @@ struct mmc_card {
#define MMC_QUIRK_TRIM_BROKEN (1<<12) /* Skip trim */
#define MMC_QUIRK_BROKEN_HPI (1<<13) /* Disable broken HPI support */
+ bool reenable_cmdq; /* Re-enable Command Queue */
unsigned int erase_size; /* erase size in sectors */
unsigned int erase_shift; /* if erase unit is power 2 */
--
1.9.1
--
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