hwmon: (ina2xx) Fix access to uninitialized mutex
commit
0c4c5860e9983eb3da7a3d73ca987643c3ed034b upstream.
Initialize data->config_lock mutex before it is used by the driver code.
This fixes following warning on Odroid XU3 boards:
INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
turning off the locking correctness validator.
CPU: 5 PID: 1 Comm: swapper/0 Not tainted 4.15.0-rc7-next-
20180115-00001-gb75575dee3f2 #107
Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
[<
c0111504>] (unwind_backtrace) from [<
c010dbec>] (show_stack+0x10/0x14)
[<
c010dbec>] (show_stack) from [<
c09b3f74>] (dump_stack+0x90/0xc8)
[<
c09b3f74>] (dump_stack) from [<
c0179528>] (register_lock_class+0x1c0/0x59c)
[<
c0179528>] (register_lock_class) from [<
c017bd1c>] (__lock_acquire+0x78/0x1850)
[<
c017bd1c>] (__lock_acquire) from [<
c017de30>] (lock_acquire+0xc8/0x2b8)
[<
c017de30>] (lock_acquire) from [<
c09ca59c>] (__mutex_lock+0x60/0xa0c)
[<
c09ca59c>] (__mutex_lock) from [<
c09cafd0>] (mutex_lock_nested+0x1c/0x24)
[<
c09cafd0>] (mutex_lock_nested) from [<
c068b0d0>] (ina2xx_set_shunt+0x70/0xb0)
[<
c068b0d0>] (ina2xx_set_shunt) from [<
c068b218>] (ina2xx_probe+0x88/0x1b0)
[<
c068b218>] (ina2xx_probe) from [<
c0673d90>] (i2c_device_probe+0x1e0/0x2d0)
[<
c0673d90>] (i2c_device_probe) from [<
c053a268>] (driver_probe_device+0x2b8/0x4a0)
[<
c053a268>] (driver_probe_device) from [<
c053a54c>] (__driver_attach+0xfc/0x120)
[<
c053a54c>] (__driver_attach) from [<
c05384cc>] (bus_for_each_dev+0x58/0x7c)
[<
c05384cc>] (bus_for_each_dev) from [<
c0539590>] (bus_add_driver+0x174/0x250)
[<
c0539590>] (bus_add_driver) from [<
c053b5e0>] (driver_register+0x78/0xf4)
[<
c053b5e0>] (driver_register) from [<
c0675ef0>] (i2c_register_driver+0x38/0xa8)
[<
c0675ef0>] (i2c_register_driver) from [<
c0102b40>] (do_one_initcall+0x48/0x18c)
[<
c0102b40>] (do_one_initcall) from [<
c0e00df0>] (kernel_init_freeable+0x110/0x1d4)
[<
c0e00df0>] (kernel_init_freeable) from [<
c09c8120>] (kernel_init+0x8/0x114)
[<
c09c8120>] (kernel_init) from [<
c01010b4>] (ret_from_fork+0x14/0x20)
Fixes:
5d389b125186 ("hwmon: (ina2xx) Make calibration register value fixed")
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>