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mmc: core: Re-structure some code in __mmc_poll_for_busy() 

To make the code a bit more understandable, let's move the check about
whether polling is allowed or not, out to the caller instead. In this way,
we can also drop the send_status in-parameter, so let's do that.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Acked-by: Avri Altman <avri.altman@wdc.com>
Link: https://lore.kernel.org/r/20210504161222.101536-4-ulf.hansson@linaro.org
This commit is contained in:
Ulf Hansson 2021-05-04 18:12:14 +02:00
parent c7bedef053
commit 1e0b069bdc
1 changed files with 13 additions and 14 deletions
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27
drivers/mmc/core/mmc_ops.c
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@ -465,8 +465,7 @@ static int mmc_busy_status(struct mmc_card *card, bool retry_crc_err,
}
static int __mmc_poll_for_busy(struct mmc_card *card, unsigned int timeout_ms,
bool send_status, bool retry_crc_err,
enum mmc_busy_cmd busy_cmd)
bool retry_crc_err, enum mmc_busy_cmd busy_cmd)
{
struct mmc_host *host = card->host;
int err;
@ -475,16 +474,6 @@ static int __mmc_poll_for_busy(struct mmc_card *card, unsigned int timeout_ms,
bool expired = false;
bool busy = false;
/*
* In cases when not allowed to poll by using CMD13 or because we aren't
* capable of polling by using ->card_busy(), then rely on waiting the
* stated timeout to be sufficient.
*/
if (!send_status && !host->ops->card_busy) {
mmc_delay(timeout_ms);
return 0;
}
timeout = jiffies + msecs_to_jiffies(timeout_ms) + 1;
do {
/*
@ -518,7 +507,7 @@ static int __mmc_poll_for_busy(struct mmc_card *card, unsigned int timeout_ms,
int mmc_poll_for_busy(struct mmc_card *card, unsigned int timeout_ms,
enum mmc_busy_cmd busy_cmd)
{
return __mmc_poll_for_busy(card, timeout_ms, true, false, busy_cmd);
return __mmc_poll_for_busy(card, timeout_ms, false, busy_cmd);
}
bool mmc_prepare_busy_cmd(struct mmc_host *host, struct mmc_command *cmd,
@ -591,8 +580,18 @@ int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
mmc_host_is_spi(host))
goto out_tim;
/*
* If the host doesn't support HW polling via the ->card_busy() ops and
* when it's not allowed to poll by using CMD13, then we need to rely on
* waiting the stated timeout to be sufficient.
*/
if (!send_status && !host->ops->card_busy) {
mmc_delay(timeout_ms);
goto out_tim;
}
/* Let's try to poll to find out when the command is completed. */
err = __mmc_poll_for_busy(card, timeout_ms, send_status, retry_crc_err,
err = __mmc_poll_for_busy(card, timeout_ms, retry_crc_err,
MMC_BUSY_CMD6);
if (err)
goto out;