commit 6ae645d5fa385f3787bf1723639cd907fe5865e7 upstream.

NULL pointer derefence happens when booting with DTB because the
platform data for haptic device is not set in supplied data from parent
MFD device.

The MFD device creates only platform data (from Device Tree) for itself,
not for haptic child.

Unable to handle kernel NULL pointer dereference at virtual address 0000009c
pgd = c0004000
	[0000009c] *pgd=00000000
	Internal error: Oops: 5 [#1] PREEMPT SMP ARM
	(max8997_haptic_probe) from [<c03f9cec>] (platform_drv_probe+0x4c/0xb0)
	(platform_drv_probe) from [<c03f8440>] (driver_probe_device+0x214/0x2c0)
	(driver_probe_device) from [<c03f8598>] (__driver_attach+0xac/0xb0)
	(__driver_attach) from [<c03f67ac>] (bus_for_each_dev+0x68/0x9c)
	(bus_for_each_dev) from [<c03f7a38>] (bus_add_driver+0x1a0/0x218)
	(bus_add_driver) from [<c03f8db0>] (driver_register+0x78/0xf8)
	(driver_register) from [<c0101774>] (do_one_initcall+0x90/0x1d8)
	(do_one_initcall) from [<c0a00dbc>] (kernel_init_freeable+0x15c/0x1fc)
	(kernel_init_freeable) from [<c06bb5b4>] (kernel_init+0x8/0x114)
	(kernel_init) from [<c0107938>] (ret_from_fork+0x14/0x3c)

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: <stable@vger.kernel.org>
Fixes: 104594b01ce7 ("Input: add driver support for MAX8997-haptic")
[k.kozlowski: Write commit message, add CC-stable]
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>

CONFIG_HOTPLUG is going away as an option so __devexit is no
longer needed.

Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

CONFIG_HOTPLUG is going away as an option so __devinit is no longer
needed.

Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Javier Martinez Canillas <javier@dowhile0.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

CONFIG_HOTPLUG is going away as an option so __devexit_p is no longer
needed.

Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

The MAX8997-haptic function can be used to control motor. User can
control the haptic driver by using force feedback framework.

Signed-off-by: Donggeun Kim <dg77.kim@samsung.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>