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Input: max8997-haptic - fix NULL pointer dereference
commit 6ae645d 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> Fixes: 104594b ("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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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