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>
Reviewed-by: Harjani Ritesh <riteshh@xxxxxxxxxxxxxx>
---
drivers/mmc/core/mmc.c | 7 +++++++
drivers/mmc/core/mmc_test.c | 14 ++++++++++++++
include/linux/mmc/card.h | 2 ++
3 files changed, 23 insertions(+)
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index df154b951a10..8c290264cf2d 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -1800,6 +1800,13 @@ 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/drivers/mmc/core/mmc_test.c b/drivers/mmc/core/mmc_test.c
index 45e623cc1624..e6f1c3fae849 100644
--- a/drivers/mmc/core/mmc_test.c
+++ b/drivers/mmc/core/mmc_test.c
@@ -26,6 +26,7 @@
#include "card.h"
#include "host.h"
#include "bus.h"
+#include "mmc_ops.h"
#define RESULT_OK 0
#define RESULT_FAIL 1
@@ -3264,6 +3265,14 @@ 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;
@@ -3271,6 +3280,11 @@ 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/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 94637796b99c..85b5f2bc8bb9 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -269,6 +269,8 @@ 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 */
unsigned int pref_erase; /* in sectors */
--
1.9.1
--
To unsubscribe from this list: send the line "unsubscribe linux-mmc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
