linux_dsm_epyc7002/drivers
Rafael J. Wysocki e841a7c69b mmc: sdio: Use empty system suspend/resume callbacks at the bus level
Neil Brown reports that commit 35cd133c

   PM: Run the driver callback directly if the subsystem one is not there

breaks suspend for his libertas wifi, because SDIO has a protocol
where the suspend method can return -ENOSYS and this means "There is
no point in suspending, just turn me off".  Moreover, the suspend
methods provided by SDIO drivers are not supposed to be called by
the PM core or bus-level suspend routines (which aren't presend for
SDIO).  Instead, when the SDIO core gets to suspend the device's
ancestor, it calls the device driver's suspend function, catches the
ENOSYS, and turns the device off.

The commit above breaks the SDIO core's assumption that the device
drivers' callbacks won't be executed if it doesn't provide any
bus-level callbacks.  If fact, however, this assumption has never
been really satisfied, because device class or device type suspend
might very well use the driver's callback even without that commit.

The simplest way to address this problem is to make the SDIO core
tell the PM core to ignore driver callbacks, for example by providing
no-operation suspend/resume callbacks at the bus level for it,
which is implemented by this change.

Reported-and-tested-by: Neil Brown <neilb@suse.de>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
[stable: please apply to 3.3-stable only]
Cc: <stable@vger.kernel.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
2012-04-05 20:32:26 -04:00
..
accessibility
acpi Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux 2012-03-30 16:45:39 -07:00
amba
ata 1) AHCI regression fix. A recent "make driver conform to spec" change 2012-03-22 20:22:30 -07:00
atm Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
auxdisplay
base Merge branch 'for-linus-3.4' of git://git.linaro.org/people/sumitsemwal/linux-dma-buf 2012-03-28 15:02:41 -07:00
bcma
block Merge branch 'akpm' (Andrew's patch-bomb) 2012-03-28 17:19:28 -07:00
bluetooth Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
cdrom powerpc: Remove some of the legacy iSeries specific device drivers 2012-03-16 09:28:05 +11:00
char Merge branch 'x86-x32-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2012-03-29 18:12:23 -07:00
clk clk: make CONFIG_COMMON_CLK invisible 2012-03-19 09:37:11 +00:00
clocksource Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2012-03-29 16:53:48 -07:00
connector
cpufreq Disintegrate and delete asm/system.h 2012-03-28 15:58:21 -07:00
cpuidle Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux 2012-03-30 16:45:39 -07:00
crypto Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2012-03-22 18:15:32 -07:00
dca
devfreq ARM: global cleanups 2012-03-27 16:03:32 -07:00
dio
dma MTD merge for 3.4 2012-03-30 17:31:56 -07:00
edac Merge branch 'linux_next' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-edac 2012-03-28 14:24:40 -07:00
eisa
firewire Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
firmware
gpio Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2012-03-29 16:53:48 -07:00
gpu drm/i915: suspend fbdev device around suspend/hibernate 2012-03-29 07:44:27 +01:00
hid Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media 2012-03-23 14:39:09 -07:00
hv Tools: hv: Support enumeration from all the pools 2012-03-16 13:36:04 -07:00
hwmon MFD changes for 3.4 2012-03-28 13:56:35 -07:00
hwspinlock
i2c Disintegrate and delete asm/system.h 2012-03-28 15:58:21 -07:00
ide Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
idle drivers/idle/intel_idle.c: fix confusing code identation 2012-03-21 17:54:54 -07:00
ieee802154
infiniband Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2012-03-29 23:17:44 -07:00
iommu The IOMMU updates for this round are not very large patch-wise. But 2012-03-23 14:15:07 -07:00
isdn Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
leds MFD changes for 3.4 2012-03-28 13:56:35 -07:00
lguest
macintosh Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
mca
md dm: add verity target 2012-03-28 18:43:38 +01:00
media ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
memstick memstick: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:19 +08:00
message Disintegrate and delete asm/system.h 2012-03-28 15:58:21 -07:00
mfd Disintegrate and delete asm/system.h 2012-03-28 15:58:21 -07:00
misc Disintegrate and delete asm/system.h 2012-03-28 15:58:21 -07:00
mmc mmc: sdio: Use empty system suspend/resume callbacks at the bus level 2012-04-05 20:32:26 -04:00
mtd Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-03-31 13:42:57 -07:00
net MTD merge for 3.4 2012-03-30 17:31:56 -07:00
nfc
nubus Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
of GPIO changes for v3.4 2012-03-28 14:08:46 -07:00
oprofile tidy up after d_make_root() conversion 2012-03-20 21:29:37 -04:00
parisc Disintegrate and delete asm/system.h 2012-03-28 15:58:21 -07:00
parport
pci ASPM: Fix pcie devices with non-pcie children 2012-03-31 12:49:56 -07:00
pcmcia Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia 2012-03-29 16:00:48 -07:00
pinctrl
platform Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux 2012-03-30 16:45:39 -07:00
pnp Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux 2012-03-30 16:45:39 -07:00
power Various small bugfixes and enhancements, plus two new drivers: 2012-03-30 16:09:02 -07:00
pps
ps3
ptp phc: Update author's email address. 2012-03-17 01:41:43 -07:00
rapidio rapidio/tsi721: fix bug in register offset definitions 2012-03-15 17:03:03 -07:00
regulator ARM: driver specific updates 2012-03-27 16:41:24 -07:00
remoteproc
rpmsg
rtc ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
s390 Disintegrate and delete asm/system.h 2012-03-28 15:58:21 -07:00
sbus Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
scsi SCSI updates on 20120331 2012-03-31 13:31:23 -07:00
sfi
sh SuperH updates for 3.4 merge window 2012-03-30 00:09:17 -07:00
sn
spi Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma 2012-03-29 15:34:57 -07:00
ssb Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-03-20 21:04:47 -07:00
staging Documentation: remove references to /etc/modprobe.conf 2012-03-30 16:03:15 -07:00
target Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2012-03-22 12:38:04 -07:00
tc
thermal thermal: Fix for setting the thermal zone mode to enable/disable 2012-03-22 01:10:18 -04:00
tty Documentation: remove references to /etc/modprobe.conf 2012-03-30 16:03:15 -07:00
uio
usb Documentation: remove references to /etc/modprobe.conf 2012-03-30 16:03:15 -07:00
uwb uwb: use for_each_clear_bit() 2012-03-23 16:58:34 -07:00
vhost Merge branch 'vhost-net' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost 2012-03-23 14:46:48 -04:00
video ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
virt
virtio virtio-pci: switch to PM ops macro to initialise PM functions 2012-03-31 08:09:51 +05:30
vlynq
w1
watchdog ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
xen One tiny feature that accidentally got lost in the initial git pull: 2012-03-24 12:20:25 -07:00
zorro
Kconfig remoteproc/rpmsg: new subsystem 2012-03-27 16:30:09 -07:00
Makefile remoteproc/rpmsg: new subsystem 2012-03-27 16:30:09 -07:00