[PATCH 1/2] mmc: core: use card pointer as the first parameter of execute_tuning()

Ulf Hansson ulf.hansson at linaro.org
Mon Feb 2 00:17:04 PST 2015

On 2 February 2015 at 09:16, Ulf Hansson <ulf.hansson at linaro.org> wrote:
>>> about bus_ops->alive, I think it can't use in tuning state.
>>> Because:
>>> bus_ops->alive() --> mmc_sd_alive(host) /* sd card */ -->mmc_send_status(host->card, NULL);
>>> But host->card == NULL in tuning state(mmc_sd_init_card->mmc_sd_init_uhs_card).
>>> Only if sd is initialized successfully, we can get card pointer by host->card.
>>> see: mmc_sd_init_card(drivers/mmc/core/sd.c), the end of this function: host->card = card
>> And bus_ops->alive only check whether mmc is alive or not, the second parameter(*status) is NULL,
>> We can not get the card status.
>> But in tuning state, we need wait until card is idle, if the previous tuning is failed.
> You are right that we can't use bus_ops->alive() in its current form.
> Changing it to take "card" and "status" as parameter should fix this
> for us. My point was more that we can't use mmc_send_status() since
> that doesn't work for SDIO.
> Anyway, it seems like we need to put this patchset on hold for a while.
> You I merge the below patch instead so we at least have something

/s /You / Should

> working for 3.20?
> [PATCH] mmc: dw_mmc: rockchip: Add DW_MCI_QUIRK_RETRY_DELAY
> https://lkml.org/lkml/2015/1/13/562
> Kind regards
> Uffe

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