Some cards apply too larg timeout value for host to response,
So limit the maximum data transfer timeout value and maximum erase
timeout value to aviod timeout issue.
Signed-off-by: Haijun Zhang <Haijun.Zhang@xxxxxxxxxxxxx>
Signed-off-by: Jerry Huang <Chang-Ming.Huang@xxxxxxxxxxxxx>
CC: Anton Vorontsov <cbouatmailru@xxxxxxxxx>
---
changes for v2:
- Add limit to data and erase timeout value calculation
- split the V1 patch into two V2 patchs.
drivers/mmc/core/core.c | 27 ++++++++++++++++-----------
1 files changed, 16 insertions(+), 11 deletions(-)
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index c241fc1..c90b791 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -721,6 +721,10 @@ void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card)
data->timeout_ns = 100000000; /* 100ms */
}
}
+
+ if (card->host->max_discard_to &&
+ card->host->max_discard_to < div_u64(data->timeout_ns, 1000000))
+ data->timeout_ns = (u64)card->host->max_discard_to * 1000000;
}
EXPORT_SYMBOL(mmc_set_data_timeout);
@@ -1880,7 +1884,7 @@ static unsigned int mmc_do_calc_max_discard(struct mmc_card *card,
return 0;
if (qty == 1)
- return 1;
+ return 1 << card->erase_shift;
/* Convert qty to sectors */
if (card->erase_shift)
@@ -1898,16 +1902,17 @@ 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)
- return UINT_MAX;
-
- /*
- * Without erase_group_def set, MMC erase timeout depends on clock
- * frequence which can change. In that case, the best choice is
- * just the preferred erase size.
- */
- if (mmc_card_mmc(card) && !(card->ext_csd.erase_group_def & 1))
- return card->pref_erase;
+ if (!host->max_discard_to) {
+ if (mmc_card_sd(card))
+ return UINT_MAX;
+ /*
+ * Without erase_group_def set, MMC erase timeout depends on
+ * clock frequence which can change. In that case, the best
+ * choice is just the preferred erase size.
+ */
+ if (mmc_card_mmc(card) && !(card->ext_csd.erase_group_def & 1))
+ return card->pref_erase;
+ }
max_discard = mmc_do_calc_max_discard(card, MMC_ERASE_ARG);
if (mmc_can_trim(card)) {
--
1.7.0.4
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