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mmc: core: always check status after reset 

Always check if the card is alive after a successful reset. This allows
us to remove mmc_hw_reset_check(), leaving mmc_hw_reset() as the only
card reset interface.

Signed-off-by: Johan Rudholm <johanru@axis.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Johan Rudholm 2015-01-12 15:38:04 +01:00 committed by Ulf Hansson
parent 25185f3f31
commit 83533ab283
3 changed files with 13 additions and 32 deletions
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20
drivers/mmc/card/mmc_test.c
View File

@ -2342,20 +2342,16 @@ static int mmc_test_hw_reset(struct mmc_test_card *test)
struct mmc_host *host = card->host;
int err;
err = mmc_hw_reset_check(host);
if (!err)
return RESULT_OK;
if (err == -ENOSYS)
return RESULT_FAIL;
if (err != -EOPNOTSUPP)
return err;
if (!mmc_can_reset(card))
if (!mmc_card_mmc(card) || !mmc_can_reset(card))
return RESULT_UNSUP_CARD;
return RESULT_UNSUP_HOST;
err = mmc_hw_reset(host);
if (!err)
return RESULT_OK;
else if (err == -EOPNOTSUPP)
return RESULT_UNSUP_HOST;
return RESULT_FAIL;
}
static const struct mmc_test_case mmc_test_cases[] = {

24
drivers/mmc/core/core.c
View File

@ -2286,9 +2286,10 @@ int mmc_can_reset(struct mmc_card *card)
}
EXPORT_SYMBOL(mmc_can_reset);
static int mmc_do_hw_reset(struct mmc_host *host, int check)
int mmc_hw_reset(struct mmc_host *host)
{
struct mmc_card *card = host->card;
u32 status;
if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset)
return -EOPNOTSUPP;
@ -2305,13 +2306,9 @@ static int mmc_do_hw_reset(struct mmc_host *host, int check)
host->ops->hw_reset(host);
/* If the reset has happened, then a status command will fail */
if (check) {
u32 status;
if (!mmc_send_status(card, &status)) {
mmc_host_clk_release(host);
return -ENOSYS;
}
if (!mmc_send_status(card, &status)) {
mmc_host_clk_release(host);
return -ENOSYS;
}
/* Set initial state and call mmc_set_ios */
@ -2321,19 +2318,8 @@ static int mmc_do_hw_reset(struct mmc_host *host, int check)
return host->bus_ops->power_restore(host);
}
int mmc_hw_reset(struct mmc_host *host)
{
return mmc_do_hw_reset(host, 0);
}
EXPORT_SYMBOL(mmc_hw_reset);
int mmc_hw_reset_check(struct mmc_host *host)
{
return mmc_do_hw_reset(host, 1);
}
EXPORT_SYMBOL(mmc_hw_reset_check);
static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq)
{
host->f_init = freq;

1
include/linux/mmc/core.h
View File

@ -182,7 +182,6 @@ extern int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen);
extern int mmc_set_blockcount(struct mmc_card *card, unsigned int blockcount,
bool is_rel_write);
extern int mmc_hw_reset(struct mmc_host *host);
extern int mmc_hw_reset_check(struct mmc_host *host);
extern int mmc_can_reset(struct mmc_card *card);
extern void mmc_set_data_timeout(struct mmc_data *, const struct mmc_card *);