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mmc: core: Rename max_discard_to to max_busy_timeout 

Rename host->max_discard_to to host->max_busy_timeout, to reflect that
it tells the mmc core layer about the maximum supported busy detection
timeout by the host.

This timeout is at the moment only applicable to erase/trim/discard
commands. By the renaming we provide the option of make use of it for
other commands that cares about busy detection. In other words, those
commands that wants an R1B response, like for example the mmc switch
command.

Do note that the max_busy_timeout is supposed to be specified only by
hosts supporting MMC_CAP_WAIT_WHILE_BUSY.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Chris Ball <chris@printf.net>
This commit is contained in:
Ulf Hansson 2013-12-18 09:57:38 +01:00 committed by Chris Ball
parent e18eaf8ff9
commit 68eb80e06b
3 changed files with 5 additions and 5 deletions
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6
drivers/mmc/core/core.c
View File

@ -2120,7 +2120,7 @@ static unsigned int mmc_do_calc_max_discard(struct mmc_card *card,
y = 0;
for (x = 1; x && x <= max_qty && max_qty - x >= qty; x <<= 1) {
timeout = mmc_erase_timeout(card, arg, qty + x);
if (timeout > host->max_discard_to)
if (timeout > host->max_busy_timeout)
break;
if (timeout < last_timeout)
break;
@ -2152,7 +2152,7 @@ unsigned int mmc_calc_max_discard(struct mmc_card *card)
struct mmc_host *host = card->host;
unsigned int max_discard, max_trim;
if (!host->max_discard_to)
if (!host->max_busy_timeout)
return UINT_MAX;
/*
@ -2172,7 +2172,7 @@ unsigned int mmc_calc_max_discard(struct mmc_card *card)
max_discard = 0;
}
pr_debug("%s: calculated max. discard sectors %u for timeout %u ms\n",
mmc_hostname(host), max_discard, host->max_discard_to);
mmc_hostname(host), max_discard, host->max_busy_timeout);
return max_discard;
}
EXPORT_SYMBOL(mmc_calc_max_discard);

2
drivers/mmc/host/sdhci.c
View File

@ -2941,7 +2941,7 @@ int sdhci_add_host(struct sdhci_host *host)
if (host->quirks & SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK)
host->timeout_clk = mmc->f_max / 1000;
mmc->max_discard_to = (1 << 27) / host->timeout_clk;
mmc->max_busy_timeout = (1 << 27) / host->timeout_clk;
mmc->caps |= MMC_CAP_SDIO_IRQ | MMC_CAP_ERASE | MMC_CAP_CMD23;

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

@ -300,7 +300,7 @@ struct mmc_host {
unsigned int max_req_size; /* maximum number of bytes in one req */
unsigned int max_blk_size; /* maximum size of one mmc block */
unsigned int max_blk_count; /* maximum number of blocks in one req */
unsigned int max_discard_to; /* max. discard timeout in ms */
unsigned int max_busy_timeout; /* max busy timeout in ms */
/* private data */
spinlock_t lock; /* lock for claim and bus ops */