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platform/x86: asus-wmi: Use kmemdup rather than duplicating its implementation 

kmemdup is introduced to duplicate a region of memory in a neat way.
Rather than kmalloc/kzalloc + memcpy, which the programmer needs to
write the size twice (sometimes lead to mistakes), kmemdup improves
readability, leads to smaller code and also reduce the chances of mistakes.
Suggestion to use kmemdup rather than using kmalloc/kzalloc + memcpy.

Signed-off-by: Fuqian Huang <huangfq.daxian@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
This commit is contained in:
Fuqian Huang 2019-07-04 00:29:51 +08:00 committed by Andy Shevchenko
parent 4215484f8e
commit 340f25ff1d
1 changed files with 1 additions and 2 deletions
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3
drivers/platform/x86/asus-wmi.c
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@ -292,12 +292,11 @@ static int asus_wmi_evaluate_method_agfn(const struct acpi_buffer args)
* Copy to dma capable address otherwise memory corruption occurs as
* bios has to be able to access it.
*/
input.pointer = kzalloc(args.length, GFP_DMA | GFP_KERNEL);
input.pointer = kmemdup(args.pointer, args.length, GFP_DMA | GFP_KERNEL);
input.length = args.length;
if (!input.pointer)
return -ENOMEM;
phys_addr = virt_to_phys(input.pointer);
memcpy(input.pointer, args.pointer, args.length);
status = asus_wmi_evaluate_method(ASUS_WMI_METHODID_AGFN,
phys_addr, 0, &retval);