diff options
Diffstat (limited to 'drivers/mmc/mmc.c')
| -rw-r--r-- | drivers/mmc/mmc.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index ee8863c123e..766bc54406e 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -475,7 +475,7 @@ static u32 mmc_select_voltage(struct mmc_host *host, u32 ocr) if (bit) { bit -= 1; - ocr = 3 << bit; + ocr &= 3 << bit; host->ios.vdd = bit; mmc_set_ios(host); @@ -1178,14 +1178,29 @@ static void mmc_rescan(void *data) { struct mmc_host *host = data; struct list_head *l, *n; + unsigned char power_mode; mmc_claim_host(host); - if (host->ios.power_mode == MMC_POWER_ON) + /* + * Check for removed cards and newly inserted ones. We check for + * removed cards first so we can intelligently re-select the VDD. + */ + power_mode = host->ios.power_mode; + if (power_mode == MMC_POWER_ON) mmc_check_cards(host); mmc_setup(host); + /* + * Some broken cards process CMD1 even in stand-by state. There is + * no reply, but an ILLEGAL_COMMAND error is cached and returned + * after next command. We poll for card status here to clear any + * possibly pending error. + */ + if (power_mode == MMC_POWER_ON) + mmc_check_cards(host); + if (!list_empty(&host->cards)) { /* * (Re-)calculate the fastest clock rate which the |