On Tue, 26 Nov 2024 at 12:57, Adrian Hunter <adrian.hunter@xxxxxxxxx> wrote:
>
> 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
Good point, I will add it when applying!
>
> > 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>
Thanks!
Kind regards
Uffe
>
> > ---
> > 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);
>
