On 25/11/24 14:24, Ulf Hansson wrote:
> Disabling card detect from the host's ->shutdown_pre() callback turned out
> to not be the complete solution. More precisely, beyond the point when the
> mmc_bus->shutdown() has been called, to gracefully power off the card, we
> need to prevent card detect. Otherwise the mmc_rescan work may poll for the
> card with a CMD13, to see if it's still alive, which then will fail and
> hang as the card has already been powered off.
>
> To fix this problem, let's disable mmc_rescan prior to power off the card
> during shutdown.
>
> Reported-by: Anthony Pighin <anthony.pighin@xxxxxxxxx>
Could add a closes tag here
> Fixes: 66c915d09b94 ("mmc: core: Disable card detect during shutdown")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Reviewed-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
> ---
> drivers/mmc/core/bus.c | 2 ++
> drivers/mmc/core/core.c | 3 +++
> 2 files changed, 5 insertions(+)
>
> diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
> index 9283b28bc69f..1cf64e0952fb 100644
> --- a/drivers/mmc/core/bus.c
> +++ b/drivers/mmc/core/bus.c
> @@ -149,6 +149,8 @@ static void mmc_bus_shutdown(struct device *dev)
> if (dev->driver && drv->shutdown)
> drv->shutdown(card);
>
> + __mmc_stop_host(host);
> +
> if (host->bus_ops->shutdown) {
> ret = host->bus_ops->shutdown(host);
> if (ret)
> diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
> index a499f3c59de5..d996d39c0d6f 100644
> --- a/drivers/mmc/core/core.c
> +++ b/drivers/mmc/core/core.c
> @@ -2335,6 +2335,9 @@ void mmc_start_host(struct mmc_host *host)
>
> void __mmc_stop_host(struct mmc_host *host)
> {
> + if (host->rescan_disable)
> + return;
> +
> if (host->slot.cd_irq >= 0) {
> mmc_gpio_set_cd_wake(host, false);
> disable_irq(host->slot.cd_irq);
