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mmc: mmc_test: Disable Command Queue while mmc_test is used

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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@intel.com>
Reviewed-by: Harjani Ritesh <riteshh@codeaurora.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Adrian Hunter 2017-03-13 14:36:38 +02:00 committed by Ulf Hansson
parent b658af7184
commit 9d4579a85c
3 changed files with 23 additions and 0 deletions
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7
drivers/mmc/core/mmc.c
View File

@ -1789,6 +1789,13 @@ 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

14
drivers/mmc/core/mmc_test.c
View File

@ -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);
}

2
include/linux/mmc/card.h
View File

@ -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 */