SD-cards cannot be reset, but they can be power cycled. Power cycling
a buggy SD-card sometimes helps it get back on track.
Signed-off-by: Johan Rudholm <johanru@xxxxxxxx>
---
drivers/mmc/core/core.c | 16 +++++++++++-----
1 files changed, 11 insertions(+), 5 deletions(-)
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index d03a080..9171aa9 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -2250,19 +2250,25 @@ static int mmc_do_hw_reset(struct mmc_host *host, int check)
{
struct mmc_card *card = host->card;
- if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset)
- return -EOPNOTSUPP;
-
if (!card)
return -EINVAL;
- if (!mmc_can_reset(card))
+ if (!mmc_card_sd(card) && !((host->caps & MMC_CAP_HW_RESET) &&
+ host->ops->hw_reset))
+ return -EOPNOTSUPP;
+
+ if (!mmc_card_sd(card) && !mmc_can_reset(card))
return -EOPNOTSUPP;
mmc_host_clk_hold(host);
mmc_set_clock(host, host->f_init);
- host->ops->hw_reset(host);
+ if (mmc_card_sd(card))
+ mmc_power_cycle(host, card->ocr);
+ else
+ host->ops->hw_reset(host);
+
+ pr_warning("%s: reset device\n", mmc_hostname(host));
/* If the reset has happened, then a status command will fail */
if (check) {
--
1.7.2.5
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