Changes for kernel versions >= 5.0.14 are now also required for 4.x branch

[fonic]

It seems the changes introduced in kernel 5.0.14 were recently backported to the 4.x branch. I encountered compiling problems after upgrading to kernel 4.19.52. With the changes implemented by #11, the driver compiles and works fine again.

I simple changed:
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5, 0, 14))
to
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5, 0, 14)) || (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 19, 52))

[svfed]

The same with 4.15.0 starting with 4.15.0-60.

[aayushbhan]

@svfed what did you change to make it work for 4.15.0-60 ?

[svfed]

Since the change of power usage count may go to any kernel version, I have chosen not to add version check as @fonic, but rather defined in rts51x.h:
#define OLD_KERNEL_PM_CNT_UPDATED 1
and right after that
#if ((LINUX_VERSION_CODE >= KERNEL_VERSION(5, 0, 14)) || OLD_KERNEL_PM_CNT_UPDATED)
and the same in all source files that require it (5 places in rts51x.c, for example)

[aayushbhan]

Ok thanks. I'll check if it works for me.

[vladki77]

I confirm that this change is needed for Debian stretch kernels too:
Linux 4.9.0-11-amd64 #1 SMP Debian 4.9.189-3+deb9u1 (2019-09-20) x86_64 GNU/Linux

[michael-xiii]

It helps for Dell Inspiron 3180

Linux small-note 4.15.0-65-generic #74-Ubuntu SMP Tue Sep 17 17:06:04 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

Changes appear somewhere after the 4.15.0-58 but before 4.15.0-65,, hard to tell

Also - I don't see the freezes now, they were the headache on 4.15.0-58 #15

But need some time for being sure