On Mon, Apr 03, 2017 at 02:41:37PM +0200, gregkh@xxxxxxxxxxxxxxxxxxx wrote: > > This is a note to let you know that I've just added the patch titled > > mmc: sdhci: Disable runtime pm when the sdio_irq is enabled > > to the 4.4-stable tree which can be found at: > http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary > > The filename of the patch is: > mmc-sdhci-disable-runtime-pm-when-the-sdio_irq-is-enabled.patch > and it can be found in the queue-4.4 subdirectory. > > If you, or anyone else, feels it should not be added to the stable tree, > please let <stable@xxxxxxxxxxxxxxx> know about it. > Sorry, this broke the build, now removed. greg k-h > > >From 923713b357455cfb9aca2cd3429cb0806a724ed2 Mon Sep 17 00:00:00 2001 > From: Hans de Goede <hdegoede@xxxxxxxxxx> > Date: Sun, 26 Mar 2017 13:14:45 +0200 > Subject: mmc: sdhci: Disable runtime pm when the sdio_irq is enabled > > From: Hans de Goede <hdegoede@xxxxxxxxxx> > > commit 923713b357455cfb9aca2cd3429cb0806a724ed2 upstream. > > SDIO cards may need clock to send the card interrupt to the host. > > On a cherrytrail tablet with a RTL8723BS wifi chip, without this patch > pinging the tablet results in: > > PING 192.168.1.14 (192.168.1.14) 56(84) bytes of data. > 64 bytes from 192.168.1.14: icmp_seq=1 ttl=64 time=78.6 ms > 64 bytes from 192.168.1.14: icmp_seq=2 ttl=64 time=1760 ms > 64 bytes from 192.168.1.14: icmp_seq=3 ttl=64 time=753 ms > 64 bytes from 192.168.1.14: icmp_seq=4 ttl=64 time=3.88 ms > 64 bytes from 192.168.1.14: icmp_seq=5 ttl=64 time=795 ms > 64 bytes from 192.168.1.14: icmp_seq=6 ttl=64 time=1841 ms > 64 bytes from 192.168.1.14: icmp_seq=7 ttl=64 time=810 ms > 64 bytes from 192.168.1.14: icmp_seq=8 ttl=64 time=1860 ms > 64 bytes from 192.168.1.14: icmp_seq=9 ttl=64 time=812 ms > 64 bytes from 192.168.1.14: icmp_seq=10 ttl=64 time=48.6 ms > > Where as with this patch I get: > > PING 192.168.1.14 (192.168.1.14) 56(84) bytes of data. > 64 bytes from 192.168.1.14: icmp_seq=1 ttl=64 time=3.96 ms > 64 bytes from 192.168.1.14: icmp_seq=2 ttl=64 time=1.97 ms > 64 bytes from 192.168.1.14: icmp_seq=3 ttl=64 time=17.2 ms > 64 bytes from 192.168.1.14: icmp_seq=4 ttl=64 time=2.46 ms > 64 bytes from 192.168.1.14: icmp_seq=5 ttl=64 time=2.83 ms > 64 bytes from 192.168.1.14: icmp_seq=6 ttl=64 time=1.40 ms > 64 bytes from 192.168.1.14: icmp_seq=7 ttl=64 time=2.10 ms > 64 bytes from 192.168.1.14: icmp_seq=8 ttl=64 time=1.40 ms > 64 bytes from 192.168.1.14: icmp_seq=9 ttl=64 time=2.04 ms > 64 bytes from 192.168.1.14: icmp_seq=10 ttl=64 time=1.40 ms > > Cc: Dong Aisheng <b29396@xxxxxxxxxxxxx> > Cc: Ian W MORRISON <ianwmorrison@xxxxxxxxx> > Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> > Acked-by: Adrian Hunter <adrian.hunter@xxxxxxxxx> > Acked-by: Dong Aisheng <aisheng.dong@xxxxxxx> > Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx> > Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> > > --- > drivers/mmc/host/sdhci.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > --- a/drivers/mmc/host/sdhci.c > +++ b/drivers/mmc/host/sdhci.c > @@ -1886,6 +1886,9 @@ static int sdhci_prepare_hs400_tuning(st > struct sdhci_host *host = mmc_priv(mmc); > unsigned long flags; > > + if (enable) > + pm_runtime_get_noresume(host->mmc->parent); > + > spin_lock_irqsave(&host->lock, flags); > host->flags |= SDHCI_HS400_TUNING; > spin_unlock_irqrestore(&host->lock, flags); > @@ -2236,6 +2239,9 @@ static void sdhci_card_event(struct mmc_ > } > > spin_unlock_irqrestore(&host->lock, flags); > + > + if (!enable) > + pm_runtime_put_noidle(host->mmc->parent); > } > > static const struct mmc_host_ops sdhci_ops = { > > > Patches currently in stable-queue which might be from hdegoede@xxxxxxxxxx are > > queue-4.4/mmc-sdhci-disable-runtime-pm-when-the-sdio_irq-is-enabled.patch