Possible memory leak in function (wil_write_file_wmi) not freeing pointer (wmi) on error path

Bug Report: https://bugzilla.kernel.org/show_bug.cgi?id=88971
Linux Version [3.17-rc1]
Configuration: Default configuration for x86

Function (wil_write_file_wmi) in file
(drivers/net/wireless/ath/wil6210/debugfs.c) allocates pointer (wmi)
on line (536) and passes it as a parameter to function
(simple_write_to_buffer) at line (540). Function
(simple_write_to_buffer) returns on line (539) with a negative value.
This causes function (wil_write_file_wmi) to return on line (542)
without freeing pointer (wmi). Thus, causing a possible memory leak
not freeing pointer (wmi).

(wil_write_file_wmi) source code reference:
http://lxr.free-electrons.com/source/drivers/net/wireless/ath/wil6210/debugfs.c#L523
(simple_write_to_buffer) source code reference:
http://lxr.free-electrons.com/source/fs/libfs.c#L625


~Ahmed