On Mon, 25 Nov 2024 at 13:24, Ulf Hansson <ulf.hansson@xxxxxxxxxx> 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> > Fixes: 66c915d09b94 ("mmc: core: Disable card detect during shutdown") > Cc: stable@xxxxxxxxxxxxxxx > Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx> Applied for fixes and by adding a Closes tag, 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); > -- > 2.43.0 >