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| author |   Ulf Hansson <ulf.hansson@linaro.org> | 2021-05-04 18:12:14 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2021-06-14 13:57:35 +0200 |
| commit | 1e0b069bdc583925d6207e091e55ad4d0f30eb4c (patch) | |
| tree | 2782acaef8cf0c38ac713068bc5e4a4d57f52dd0 /drivers/mmc/core | |
| parent | mmc: core: Take into account MMC_CAP_NEED_RSP_BUSY for eMMC HPI commands (diff) | |
| download | linux-dev-1e0b069bdc583925d6207e091e55ad4d0f30eb4c.tar.xz linux-dev-1e0b069bdc583925d6207e091e55ad4d0f30eb4c.zip | |
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
Diffstat (limited to 'drivers/mmc/core')
| -rw-r--r-- | drivers/mmc/core/mmc_ops.c | 27 |
1 files changed, 13 insertions, 14 deletions
diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c index 66ae699a410f..ccaee1cb7ff5 100644 --- a/drivers/mmc/core/mmc_ops.c +++ b/drivers/mmc/core/mmc_ops.c @@ -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; |