Martin Wilck 9e5d4a6c79 base/platform: Fix platform drivers with no probe callback ... commit 25cad69f21 upstream. Since b8b2c7d845, platform_drv_probe() is called for all platform devices. If drv->probe is NULL, and dev_pm_domain_attach() fails, platform_drv_probe() will return the error code from dev_pm_domain_attach(). This causes real_probe() to enter the "probe_failed" path and set dev->driver to NULL. Before b8b2c7d845, real_probe() would assume success if both dev->bus->probe and drv->probe were missing. As a result, a device and driver could be "bound" together just by matching their names; this doesn't work any more after b8b2c7d845. This may cause problems later for certain usage of platform_driver_register() and platform_device_register_simple(). I observed a panic while loading the tpm_tis driver with parameter "force=1" (i.e. registering tpm_tis as a platform driver), because tpm_tis_init's assumption that the device returned by platform_device_register_simple() was bound didn't hold any more (tpmm_chip_alloc() dereferences chip->pdev->driver, causing panic). This patch restores the previous (4.3.0 and earlier) behavior of platform_drv_probe() in the case when the associated platform driver has no "probe" function. Fixes: b8b2c7d845 ("base/platform: assert that dev_pm_domain callbacks are called unconditionally") Signed-off-by: Martin Wilck <Martin.Wilck@ts.fujitsu.com> Cc: Martin Fuzzey <mfuzzey@parkeon.com> Acked-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2016-02-17 12:30:55 -08:00
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power	Merge branches 'powercap', 'pm-cpufreq' and 'pm-domains'	2015-12-14 22:58:57 +01:00
regmap	driver core update for 4.4-rc1	2015-11-04 21:50:37 -08:00
attribute_container.c
base.h
bus.c
cacheinfo.c
class.c
component.c
container.c
core.c
cpu.c
dd.c
devcoredump.c
devres.c
devtmpfs.c
dma-coherent.c
dma-contiguous.c	driver core update for 4.4-rc1	2015-11-04 21:50:37 -08:00
dma-mapping.c
driver.c
firmware_class.c
firmware.c
hypervisor.c
init.c
isa.c
Kconfig
Makefile
map.c
memory.c	drivers/base/memory.c: prohibit offlining of memory blocks with missing sections	2015-12-12 10:15:34 -08:00
module.c
node.c
pinctrl.c
platform-msi.c
platform.c	base/platform: Fix platform drivers with no probe callback	2016-02-17 12:30:55 -08:00
property.c	device property: ACPI: Remove unused DMA APIs	2015-11-07 01:29:22 +01:00
soc.c
syscore.c
topology.c
transport_class.c