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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 <[email protected]>
Reviewed-by: Harjani Ritesh <[email protected]>
Reviewed-by: Linus Walleij <[email protected]>
Signed-off-by: Ulf Hansson <[email protected]>
This commit is contained in:
Adrian Hunter 2017-03-13 14:36:38 +02:00 • committed by Ulf Hansson
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);
}